Desórdenes conativos en la enfermedad de Alzheimer. Presentación de un caso / Conative disorders in Alzheimer's disease. Case report

RESUMEN Se presenta el caso de una paciente femenina de 76 años, estudiada por demencia tipo Alzheimer con trastornos en la esfera conativa y agresividad. El contexto personal y social del paciente, por las características de su enfermedad, especialmente trastornos de conducta, comportamiento agresivo, agitación, irritabilidad, hiperactividad, desinhibición sexual, deambulación errática y reacciones catastróficas, hacen interesante el conocimiento de esta patología, sus implicaciones y el abordaje terapéutico. Por lo expuesto anteriormente se decide realizar esta investigación con el objetivo de describir los desórdenes conativos en la enfermedad de Alzheimer (AU).

ABSTRACT The case of a 76-years-old female patient, studied for Alzheimer-type dementia with disorders in the conative sphere and aggressiveness is presented. The patient´s personal and social context makes it interesting knowing this pathology, its implications and therapeutic approach due to the nature of the illness, especially the behavior disorder, aggressive behavior, agitation, irritability, hyperactivity, sexual disinhibition, erratic wandering and catastrophic reactions. For all the before said, it was decided to make this research with the aim of describing the conative disorders in Alzheimer's disease (AU).

Correlation of Behavioral and Psychological Symptoms and Homocysteine in Patients with Dementia of Alzheimer's Type / 정신신체의학

OBJECTIVES: Homocysteine has been associated with cognitive impairment and various psychiatric symptoms. This study was designed to examine the relationship exists between plasma homocysteine concentration and behavioral and psychological symptoms of dementia(BPSD). METHODS: 41 subjects with dementia of Alzheimer's type were included in this study. We carried out history taking, physical examination, and cognitive assessment for the diagnosis of dementia of Alzheimer's type based on DSM-IV. We scored the Mini Mental State Examination(MMSE), Global Deterioration Scale(GDS), Clinical Dementia Rating(CDR), and the Korean Neuropsychiatric Inventory(K-NPI). We also measured levels of homocysteine, folate, and vitamin B12 in the plasma. RESULTS: We found statistically significant positive correlations between homocysteine concentration with NPI total score, and with scores of several sub-domains such as delusion, agitation/aggression, depression/dysphoria, and elation/euphoria. No significant correlation existed between homocysteine levels and scores of MMSE, GDS, and CDR. CONCLUSIONS: This study shows that plasma homocysteine levels are associated with BPSD. Further research is necessary to identify pathophysiologic mechanisms underlying these relationships.

The Differences of Serum Homocysteine Levels in Mild Cognitive Impairment and Dementia of Alzheimer's Type with or without Depressive Symptoms / 정신신체의학

OBJECTIVES: Mild cognitive impairment(MCI) and dementia of Alzheimer's type(AD) are characterized by progressive decline of cognitive abilities and a wide range of neuropsychiatric symptoms like depression. Among various diagnostic tools of AD, many studies showed that elevated levels of serum total homocysteine are associated with increased risk of developing Alzheimer's disease, depression and other neuropsychiatric disorders. We investigated whether elevated homocysteine concentrations are associated with depressive symptoms in MCI and AD. METHODS: A total of 86 patients diagnosed with MCI or AD participated. Total serum homocysteine levels in fasting blood samples were measured. We examined cognitive symptoms by MMSE-KC, Global Deterioration Scale(GDS), Clinical dementia rating(CDR) and depressive symptoms by Korean version of Geriatric Depression Scale(K-GDS). RESULTS: The total serum homocysteine levels were significantly higher in MCI with depression than in MCI without depression. There was no significant difference in the mean homocysteine levels between AD patients with depression and AD patients without depression. The total homocysteine levels showed a negative correlation with MMSE-KC and a positive correlation with CDR, GDS. CONCLUSIONS: These findings suggest that elevated homocysteine level is a risk factor for the decline of cognitive function and depression. We found a significant relationship between elevated serum homocysteine level and depressive symptoms in MCI. But our study had several limitations, thus more research is needed to confirm this finding.

Senile dementia and pharmacological drugs / A demência senil e drogas farmacológicas

Side effects and drug interactions are common in the elderly and highly relevant in the demented, being routinely confused with symptoms of cognitive impairment. Which drugs are most consumed by this patient group? Do prescription patterns differ between the demented and non-demented? OBJECTIVE: To define drug consumption quantitatively and qualitatively in demented (D) and non-demented (ND) elderly. METHODS: Patients were divided into men and women, by age group (<80 and >80 years), non-demented and demented status, and consumers of <3 or >3 drugs. As a criterion comparing groups, the Chi-square (Fisher's exact) test was employed. This study is part of Project No. 405/10 approved by the Ethics Committee of the institution. RESULTS: The sample had a mean age of 81.5±8.8 years, 29 D (21 women and 8 men) and 21 ND (16 women and 5 men), 12 consumers of up to three drugs (7 D and 5 ND) and 38 consumers of 3 medications or more (22 D and 16 ND). The most used drugs among dementia patients were aspirin, angiotensin-converting enzyme inhibitors, statins, selective serotonin reuptake inhibitors, and vitamins. Drugs most consumed by non-demented included vitamins, aspirin, calcium carbonate, proton pump inhibitors, statins and alendronate sodium. There was no statistical significance on any of the comparisons, although the number of elderly consumers of vitamins in the ND had a p-value of 0.06 (Yates). CONCLUSION: The elderly in this series, regardless of dementia status, gender or age group, had similar drug consumption patterns and used multiple drugs simultaneously.

Iatrogenias, efeitos colaterais e interações medicamentosas são comuns em idosos e altamente relevantes em dementados, onde corriqueiramente as manifestações decorrentes são confundidas com disfunção cognitiva. Quais seriam os medicamentos mais consumidos por esses pacientes? O padrão de prescrição diferiria dos não-dementados? OBJETIVO: Definir os padrões de consumo medicamentoso, quantitativos e qualitativos em dementados (D) e não-dementados (ND). MÉTODOS: Casuística dividida entre homens e mulheres, por idade (<80 e >80 anos), dementados e não-dementados, consumidores de <3 ou >3 medicamentos. Como critério comparativo entre grupos, utilizou-se qui-quadrado (teste exato de Fisher). Esse estudo faz parte do Projeto No. 405/10 aprovado pelo Comitê de Ética em Pesquisa da Irmandade da Santa Casa de Misericórdia de São Paulo. RESULTADOS: A Idade média foi de 81,5±8,8 anos, 29 D (21 mulheres e 8 homens) e 21 ND (16 mulheres e 5 homens), 12 consumidores de até 3 medicamentos (7 D e 5 ND) e 38 consumidores de mais de 3 medicamentos (22 D e 16 ND). Os medicamentos mais consumidos entre os dementados foram: ácido acetil salicílico, inibidores da enzima conversora da angiotensina, estatinas, inibidores da recaptação da serotonina e vitaminas. Fármacos mais consumidos entre os não-dementados: vitaminas, ácido acetil salicílico, carbonato de cálcio, inibidores da bomba de prótons, estatinas e alendronato de sódio. Não houve significância estatística nas comparações entre os grupos D e ND, embora o número de idosos ND consumidores de vitaminas apresente p 0,06 (Yates). CONCLUSÃO: Na presente casuística, dementados ou não, independentemente do gênero ou da faixa de idade, apresentam padrão medicamentoso semelhante, merecendo ênfase a multiplicidade de fármacos em uso simultaneamente.

<b>The Effectiveness of Hangebyakujutsutemmato </b><b>for Alzheimer's Type Dementia </b> / 日本東洋医学雑誌

Dementia of the Alzheimer's type, in which cognitive impairment slowly progresses, accounts for more than half of dementia cases. Symptoms develop slowly and worsen over time, and there is no cure for Alzheimer's type dementia. We conducted a study on the efficacy of hangebyakujutsutemmato for cognitive impairment in dementia of the Alzheimer's type. Seventy-two patients with Alzheimer's type dementia were enrolled in our study. Hasegawa dementia scale-revised (HDS-R) was implemented for all patients, for whom hangebyakujutsutemmato medication was started at the initial visit. After 4-weeks' treatment the HDS-R was implemented again. Sixty-four patients were assessable and 8 patients dropped out from the study. In these 64 patients, mean age ± standard deviation was 79.9 ± 6.0, and 33 patients were male, and 31 patients were female. After 4 weeks of hangebyakujutsutemmato treatment, HDS-R scores were increased significantly compared with baseline (from 15.5 ± 5.2 to 16.9 ± 6.2, p < 0.01). In taking histories from families, clinical presentation was shown to have improved in 13 patients (20.3%). To our knowledge, this is the first report demonstrating that hangebyakujutsutemmato is effective for patients with dementia of the Alzheimer's type. In conclusion, hangebyakujutsutemmato is a useful option for the treatment of cognitive impairment in Alzheimer's type dementia.

Investigation of the Correlation between Seoul Neuropsychological Screening Battery Scores and the Gray Matter Volume after Correction of Covariates of the Age, Gender, and Genotypes in Patients with AD and MCI

PURPOSE: To investigate the correlations between Seoul Neuropsychological Screening Battery (SNSB) scores and the gray matter volumes (GMV) in patients with Alzheimer's disease (AD) and mild cognitive impairment (MCI) and cognitively normal (CN) elderly subjects with correcting the genotypes. MATERIALS AND METHODS: Total 75 subjects were enrolled with 25 subjects for each group. The apolipoprotein E (APOE) epsilon genotypes, SNSB scores, and the 3D T1-weighted images were obtained from all subjects. Correlations between SNSB scores and GMV were investigated with the multiple regression method for each subject group using both voxel-based and region-of-interest-based analyses with covariates of age, gender, and the genotype. RESULTS: In the AD group, Rey Complex Figure Test (RCFT) delayed recall scores were positively correlated with GMV. In the MCI group, Seoul Verbal Learning Test (SVLT) scores were positively correlated with GMV. In the CN group, GMV negatively correlated with Boston Naming Test (K-BNT) scores and Mini-Mental State Examimation (K-MMSE) scores, but positively correlated with RCFT scores. CONCLUSION: When we used covariates of age, gender, and the genotype, we found statistically significant correlations between some SNSB scores and GMV at some brain regions. It may be necessary to further investigate a longitudinal study to understand the correlation.

Features of Semantic Language Impairment in Patients with Amnestic Mild Cognitive Impairment

BACKGROUND: To elucidate the earliest changes of language function in patients with dementia of Alzheimer's type (DAT), performance on the various semantic language tasks were compared between patients with amnestic mild cognitive impairment (aMCI) (n=20), mild DAT (n=20) and normal cognition elderly individuals (NC, n=20). METHODS: Language tasks included levels of word, sentence and discourse. In the word level, confrontation naming test (Korean version-Boston Naming Test, K-BNT) and the verbal fluency (semantic and phonemic fluency) tasks were used. In the sentence level, the verbal definition tasks including 24 nouns four categories were used. In the discourse level, the Boston Cookie-Theft picture description task was used. The picture description task was analyzed for both productive aspect (total number of sentences, total number of phrases and phrases per sentence) and semantic aspect (ratio of CIU: Correct Information Unit). RESULTS: The results from this study are as follow: 1) In the confrontation naming test, mild DAT group showing worse performances than the NC and aMCI group. However, no differences were observed between the NC and aMCI group. 2) The performances of verbal fluency task showed significantly differences between the all groups. 3) In the verbal definition task, performances of NC group showing better performances than aMCI and mild DAT group. However, no differences were observed between the aMCI and mild DAT group. 4) In the picture description task, performances of the aMCI and mild DAT group were non-informative and inefficient in semantic aspect compared to the NC group. However, no differences were observed between the three groups on productive aspect. CONCLUSIONS: These results demonstrated that the deficit of semantic language is readily identified in the aMCI stage, and it can be revealed by tasks of sentence and discourse level.

Nivel de depresión experimentada por una muestra de cuidadores informales de pacientes con demencia tipo Alzheimer / Level of depression experienced by a sample of informal caregivers of patients with Alzheimer-type dementia

Estudio transversal descriptivo, tipo cuantitativo, cuyo objetivo fue identificar el nivel de depresión en una muestra de cuidadores informales de pacientes con Alzheimer, compuesta por 52 sujetos. Se tuvo en cuenta los siguientes criterios de inclusión: ser cuidador informal principal, tener mínimo 3 meses cuidando al enfermo, no recibir ningún tipo de remuneración económica y cuidar pacientes no institucionalizados. Se aplicó el Inventario de Depresión Estado/ Rasgo ( IDER ). Los resultados arrojados indican en la escala total de estado 46,2% y en la subescala de eutimia estado 51,9%, lo cual evidencia una alta presencia de depresión. En la escala total de rasgo se encuentra un total de ausencia de 76,9% y en la subescala de distimia rasgo una ausencia de 88,5%, lo cual indica que no hay relevancia en cuanto el nivel de depresión como rasgo.

Descriptive cross-sectional, quantitative study, aimed to identify the level of depression in a sample of informal caregivers of Alzheimer's patients, composed of 52 subjects. Consideration was given to the following inclusion criteria: primary informal caregiving, with at least 3 months in the care of the patient, with no financial compensation and taking care of non-institutionalized patients. The Depression Inventory (state / trait) IDER , was applied on the sample; The results of the test show a 46.2% in the scale of total state, and a 51.9% in euthymic state subscale, showing also a high incidence of depression. In full scale of trait, there is a total absence of 76.9%, but in the dysthymia subscale, the trait had an absence of 88.5%, therefore, there is no relevance in terms of the level of depression as a trait.

Neuropsychiatric Symptoms in Patients with Mild Cognitive Impairment and Dementia of Alzheimer's Type / 정신신체의학

OBJECTIVES: We investigated the prevalence and composite score of the neuropsychiatric symptoms in patients with mild cognitive impairment(MCI), and dementia of Alzheimer's type(AD). The aim of this study is to analyze the correlation between the result of Korean Neuropsychiatric Inventory(K-NPI) and cognitive function. METHODS: A total of 163 patients diagnosed with MCI or AD was divided into three groups(55 MCI patients, 56 dementia patients with mild stage, and 52 dementia patients with moderate, severe stage). We examined neuropsychiatric symptoms by K-NPI and compared the prevalence and composite score of each subdomain in K-NPI among three groups. RESULTS: The most common symptoms in the MCI group were depression/dysphoria, sleep/night-time behavior, anxiety, and irritability/lability. In mild AD group, the most frequent disturbance was agitation/aggression, depression/dysphoria, anxiety, apathy/indifference, and sleep/night-time behavior. In moderate to severe AD group, the most frequent disturbance was apathy/indifference, depression/dysphoria, agitation/aggression, and delusion. The frequencies of delusion, hallucination, agitation/aggression, apathy/indifference, aberrant motor behavior, appetite/eating change were statistically significant. The total NPI score showed a negative correlation with MMSE-KC and a positive correlation with GDS. CONCLUSIONS: Neuropsychiatric symptoms are common features of MCI and AD. These symptoms observed in MCI are similar to those of mild AD. Psychosis is most common in moderate to severe AD, leading to a faster rate of cognitive decline. Therefore, proper management according to the neuropsychiatric symptoms of MCI and three stages of dementia is needed.

Disociaciones en el rendimiento práxico en pacientes con demencia tipo alzheimer: Imitación de gestos transitivos, intransitivos y no familiares / Dissociations in the praxia performance of patients with alzheimer type dementia: Transitive, intransitive and non-familiar gestures imitation

En el contexto de evaluación de praxias, los gestos pueden clasificarse en tres categorías: transitivos, intransitivos y no familiares. Si bien ha sido reportada la disociación entre los distintos tipos de gestos, es usual que en la evaluación de praxias o en el análisis del desempeño de los pacientes no se consideren por separado estas tres categorías de gestos, o se varíe la definición de ellas. El objetivo del estudio que se informa fue evaluar si en un mismo grupo de pacientes con demencia tipo Alzheimer se encuentran disociaciones entre gestos transitivos, intransitivos y no familiares, previamente descriptas en el rendimiento práxico de pacientes con lesiones focales (González Rothi, Mack, Verfaellie, Brown & Heilman, 1988; Negri et al., 2007). Se evaluaron 50 pacientes con diagnóstico de demencia tipo Alzheimer probable en imitación de praxias (gestos transitivos, gestos intransitivos y gestos no familiares) y uso de objetos. Los estímulos fueron tomados de la batería cognitiva de evaluación de praxias (Politis, 2003). Los gestos eran inicialmente realizados por el examinador, quien mantenía su ejecución durante la imitación del paciente. El grupo con diagnóstico de demencia tipo Alzheimer rindió significativamente peor que el grupo de los controles sanos. En el grupo de pacientes, las cuatro pruebas de praxias correlacionaron entre si. Sin embargo, se hallaron disociaciones en el rendimiento individual de cada paciente en esas mismas pruebas. La disociación entre gestos transitivos, intransitivos y no familiares apoya la posibilidad de que estos diferentes tipos de gestos involucren sistemas de procesamiento distintos.

Apraxia is classically defined as a difficulty or inability to imitate gestures, produce pantomimes of tool's use, or make gestures to verbal command. In apraxia assessment, gestures can be classified in transitives, intransitives, and non-familiars. The movements are classified according to the purpose of the motor act: if involves manipulation of an object, if serves to communicate ideas or feelings, or if it lack of any practical or symbolical value. Whilst the selective impairment for the processing of transitive gestures was widely reported, a deficit restricted to intransitive gestures was reported only exceptionally. Although it has been reported dissociation between different types of gestures, is usual in apraxia assessment that these three categories of gestures don't be considered separately or that varies the definition of these categories. The aim of this study was verify the presence of dissociations between transitives, intransitives, and non-familiars gestures in a same group of patients with Alzheimer-type dementia, that was previously described in the praxias performance of patients with focal lesions (González Rothi, Mack, Verfaellie, Brown, & Heilman, 1988; Negri et al., 2007). It was assessed imitation of transitives, intransitives and non-familiar gestures, and the use of objects, in 50 patients of the Neurology Department of Eva Perón Hospital (Buenos Aires -Argentina) diagnosed with probable Alzheimer-type dementia, under the diagnostic criteria of NINCDS - ADRDA. The Alzheimer-type dementia group performed the tasks significantly worse than healthy controls. 72% showed deficit in the per formance of at least one of the praxis battery tests. In Alzheimer-type dementia group, each praxis subtest are significantly and positively correlated with the others. However, there were dissociations in the performances at the single-case level analysis. One patient (Case 3) showed a selective deficit in imitation of intransitives gestures, while retaining the imitation of transitives gestures and non-familiar gestures; five patients (Cases 16, 23, 31, 45, and 46) showed an exclusively impairment in the imitation of transitives gestures while retaining the imitation of intransitives gestures and non-familiar gestures; and five patients (Cases 2, 6, 12, 14, and 29) showed a deficit only in the imitation of non-familiar gestures, while retaining the imitation of transitives and intransitives gestures. The dissociation between transitives, intransitives, and non-familiar gestures supports the possibility that these different types of gestures implicate different processing systems. The presence of double dissociations points out that the processes underlying each task, at least, are partially independent, and can be affected in a differentiated way. The finding of alterations in the three types of gestures questions the hypothesis that ideomotor apraxia is a disorder in the representations underlying transitives gestures (Buxbaum et al., 2005). The double dissociation found in theimitation of familiar gestures and non-familiar gestures provides new evidence for a non-lexical path, exclusive for imitating non-familiar gestures (González Rothi, Ochipa, & Heilman, 1991) and contradicts the model of ideomotor apraxia that propose a common substrate for lexical path and non-lexical pathway, linked to body schema (Buxbaum, Giovannetti, & Libon, 2000). The results of this work show the value of the study of multiple cases for the validation of cognitive models in patients with brain injuries. It is transcendent the systematic exploration and analysis of the different types of gestures in apraxic patients, in theoretical terms and with a view to developing clinical advantages in identifying and potentially rehabilitate apraxia.

Jonathan Swift y su contribución científica en "Los viajes de Gulliver" / Jonathan Swift's scientific contribution on his "Gulliver's Travels"

Jonathan Swift is one of the most celebrated satirist writers in literature. His well-known "Gulliver's Travels", apartfrom being a serious human being criticism, contains many interesting ana unrecognized comments about medical and other scientific facts. Swift made what seems to be thefirst account of a dementing illness in the elderly; his description fits well with what we now know as Alzheimer's disease. He also described a condition now called synaesthesia, a very interestingphenomenon that may contribute to creativity. In thispaper, we review aspects ofhis Ufe and reveal these amazing descriptions as samples of Swift's extraordinary power of observation.

Datos normativos de pruebas neuropsicológicas en adultos mayores en una población Colombiana / Normative data of neuropsychological tests in elderly people in a Colombian population

Introducción: El Grupo de Neurociencias de Antioquia utiliza como protocolo de evaluación cognitiva la batería cognitiva del CERAD. Objetivo: Validar una serie de pruebas neuropsicológicas utilizadas para el diagnóstico de enfermedades neurodegenerativas en una población colombiana. Procedimiento: La muestra estuvo conformada por 848 participantes. Además 151 personas con demencia de Tipo Alzheimer (DTA) y 36 con Deterioro Cognitivo Leve (DCL). Resultados: Para los dominios cognoscitivos evaluados se encontraron coeficientes de consistencia superiores a 0.70. La confiabilidad test-retest presentó coeficientes de correlación intraclase mayores a 0.70. Entre grupos se encontraron diferencias estadísticamente significativas (p<0.05). Se encontraron correlaciones de moderadas a altas entre las pruebas neuropsicológicas y las escalas que miden severidad de la demencia y la funcionalidad. Discusión: Las pruebas utilizadas son útiles para la evaluación de las enfermedades neurodegenerativas, la comunidad científica podrá contar con normas ajustadas a los factores sociodemográficos característicos de nuestra población y otras que presenten características similares a esta población colombiana.

Introduction: Antioquia Neurosciences Group used as a cognitive assessment protocol, the CERAD cognitive battery. Objective: To validate a series of neuropsychological tests used for diagnosis of neurodegenerative disease in a Colombian population. Procedure: The sample consisted of 848 participants. In addition 151 people with dementia of Alzheimer type (DAT) and 36 with mild cognitive impairment (MCI). Results: For the cognitive domains assessed by this protocol consistency coefficients were above 0.70. The test-retest reliability intraclass correlation coefficients showed greater than 0.70. Between groups differences were statistically significant (p <0.05). We found moderate to high correlations between neuropsychological tests and scales that measure severity of dementia and functionality. Discussion: The tests used are useful for the evaluation of neurodegenerative diseases, the scientific community may have rules tailored to the sociodemographic characteristics of our population and that may be useful in populations that have similar characteristics to this Colombian population.

Power Spectral Analysis of Resting EEG in Elderly Patients With Dementia of Alzheimer and Those With Major Depression in Comparison With Normal Healthy Control

BACKGROUND: Depression is one of the most frequent neuropsychiatric comorbidities of dementia of Alzheimer type (DAT). The aim of the present study was to compare the quantitative EEG changes in patients with DAT with those in old age depression (OAD). METHODS: We recruited 39 subjects (mean age=65.4+/-5.9, 30 women, 13 DAT, 13 OAD, and 13 healthy controls) and performed the absolute and relative power spectral analyses for delta, theta, alpha, and beta activities. RESULTS: The DAT group showed higher frequency of delta in all the topographic areas than the OAD and controls (p<0.05). Delta activity was more frequent in the DAT than OAD group in the bilateral central (C3, C4) and temporal areas (T3, T4) (p<0.05). Compared with the controls, the DAT group showed decreased alpha activity in the left central (C3) and temporal (T3) areas (p<0.05). Beta activity was increased in the OAD group (O1 and O2), compared with that in the other two groups (p<0.05). CONCLUSIONS: Spectral analysis showed more prominent delta slowing in the DAT group, which is in line with more severe cognitive dysfunction in the DAT than the OAD group.

Comparison of Amisulpride and Risperidone in the Treatment of Psychosis in Patients with Dementia of the Alzheimer's Type

This study compared the effectiveness and tolerability of amisulpride and risperidone in patients with psychosis associated with dementia of the Alzheimer's type (DAT). This 8-week open label study randomized 72 patients with DAT associated psychosis either to amisulpride (n=36) and risperidone (n=36). The effectiveness of the treatments was assessed with the Korean version of Neuropsychiatry Inventory (K-NPI) psychosis subscale and total K-NPI and the Clinical Global Impression-Severity of Illness (CGI-S) scale. The Simpson-Angus Rating Scale, the Barnes Akathisia Rating Scale and the Abnormal Involuntary Movement Scale were used for the assessment of side effects. The K-NPI psychosis subscale, total K-NPI and CGI-S scores were significantly decreased over time in both treatment groups without any significant group difference and time by the group interaction effect. There were no serious adverse events in both groups. This study showed that either amisulpride or risperidone would be effective and tolerable for treating psychotic symptom associated with DAT. Adequately powered studies with a head-to-head comparison design will be mandatory to draw any definite conclusion.

Decreased Plasma Antioxidants Level in Patients with Dementia of Alzheimer's Type / 신경정신의학

OBJECTIVES: Previous studies have suggested that oxidative injuries to the neuron may have important role in the pathophysiologic mechanisms of dementia of Alzheimer's type. In the present study, we evaluate the plasma levels of albumin, total bilirubin, and uric acid in the patients with dementia of Alzheimer's type, and compare to those of the healthy controls. METHODS: The plasma albumin, bilirubin, and uric acid levels were measured by standard methods in 102 patients with dementia of Alzheimer's type (male 42, female 60) and 99 healthy controls (male 47, felmale 52). The Korean version of Mini Mental Status Examination (MMSE-K) was used to evaluate the cognitive functions of patients with dementia of Alzheimer's type. RESULTS: The plasma albumin (F=36.179, p<0.001), bilirubin (F=101.508, p<0.001), uric acid (F=12.688, p<0.001) levels in the patients with dementia of Alzheimer's type were significantly lower than those of the healthy controls. The scores of MMSE-K were positively correlated with the plasma albumin level in the patients with dementia of Alzheimer's type after adjusted for covariates such as age, gender, and body mass index (p=0.017). CONCLUSION: This study supported that oxidative injuries might be involved in the pathogenesis of dementia of Alzheimer's type, as well as suggested that some antioxidant might be associated with the cognitive functions in dementia of Alzheimer's type.

Relation of Serum Homocysteine Level to Oxidative Stress in Patients with Alzheimer's Dementia / 신경정신의학

OBJECTIVES: The goal of this study was to find an association between elevated blood homocysteine level in Korean patients with dementia of the Alzheimer's type (DAT), to analyze affecting factors, and to identify the role of oxidative stress which was known to be an underlying mechanism of hyperhomocysteinemia in DAT. METHODS: The subjected were consisted of 54 patients with dementia of the Alzheimer's type and 54 normal controls with age over 60. The clinical data was obtained by structured interview and medical records. Serum homocysteine, plasma total antioxidant capacity (TAC) and serum apolipoprotein E (apo E) levels were measured, and the cognitive function (Mini-Mental State Examination, MMSE), severity of dementia (Clinical Dementia Rating, CDR/Global Deterioration Scale, GDS), activities of daily living (Activities of Daily Living, ADL/Instrumental Activities of Daily Living, IADL) and severity of depression (Geriatric Depression Scale) were also evaluated using various rating scales. RESULTS: 1) The mean (+/-S.D.) serum homocysteine level in patients with dementia of the Alzheimer's type (21.69+/-8.24 micromol/L) was significantly (p<0.05) higher than the mean (+/-S.D.) serum homocysteine level in the control group (16.60+/-4.85 micromol/L) 2) The mean age and IADL scores of DAT patients with elevated serum homocysteine level were significantly higher than those of DAT patients with normal serum homocysteine level (p<0.05). However, there were no difference between groups in the MMSE, GDS, CDR, ADL, Geriatric Depression Scale, plasma TAC and serum apo E level. 3) The serum homocysteine level in patients with Alzheimer's dementia had no correlation with age, cognitive function, severity of dementia, activities of daily living, severity of depresseion nor plasma TAC and serum apo E level. CONCLUSION: This study does not support the association between elevated serum homocysteine level and oxidative stress.

Blood Markers of Oxidative Stress in Dementia

OBJECTIVES: To identify changes in blood markers of oxidative stress among dementic and healthy aged persons, and to compare levels of peripheral markers of oxidative stress between dementia of the Alzheimer's type (DAT) and vascular dementia (VD), and finally to analyze factors affecting those. DESIGN: Some antioxidants had been known to reduce the risk of dementia, while increase of 4-hydroxy-nonenal and decrease of heme oxygenase in DAT had been reported. Recently increased free radical activities were also found in VD. Therefore, this study was tried to search for a blood markers to discriminate DAT and VD. MATERIALS AND METHOD: The blood levels of total antioxidant capacity (TAC) and catalase activity of 50 patients with DAT and 50 patients with VD were compared with those of 56 healthy aged controls. In addition, variables including risk factors of dementia, degree of dementia measured by MMSE, Hasegawa Dementia Scale, GDS and CDR, and activities of daily living were also assessed. RESULTS: 1) The levels of TAC were significantly (p<0.01) lower in dementia than normal aged controls (1.47+/-0.08 mmol/L), while the catalase activities were significantly (p<0.01) higher in dementia than normal aged controls (45.61+/-11.67 kU/L). 2) The TAC levels were significantly (p<0.01) lower while the catalase significantly (p<0.01) higher in DAT (1.24+/-0.09 mmol/L, 133.42+/-58.45 kU/L respectively) than VD (1.31+/-0.08 mmol/L, 81.33+/-24.65 kU/L respectively). 3) The TAC and catalase activities were significantly (p<0.01) correlated with duration of dementia, behavior symptoms, activities of daily living, and the severity of dementia. CONCLUSIONS: Peripheral blood markers of oxidative stress were significantly different in dementia from normal aged controls. Furthermore, the difference was more severe in DAT than VD, which means the effect of oxidative stress is more in DAT than in VD. Therefore, they might be clinically useful to assess and discriminate dementia.

Cerebrovascular Reactivity in Dementia of Alzheimer's Type Assessed by Acetaxolamide Brain SPECT / 신경정신의학

OBJECTIVES: The purpose of this study was to investigate the abnormality of cerebrovascular reactivity in patients with dementia of Alzheimer's type by the acetazolamide brain SPECT, which has been used in the assessment of cerebrovascular diseases. METHODS: Eighteen patients with dementia of Alzheimer's type, as diagnosed by the criteria of DSM-IV and NINCDS-ADRDA, and ten normal comparison subjects were recruited. They were rated by Mini-Mental Status Examination, Mattis Ddementia Rating Scale, and Hamilton Depression Rating Scale. Acetazolamide brain SPECT scans of dementia patients and comparison subjects were analyzed by 3-dimensional volume of interest method. RESULTS: The results were as follows. There were significant differences in the values of cerebrovascular reactivity between the two groups. The cerebrovascular reactivity of dementia patients was significantly decreased in the right frontal lobes, and increased in left temporal lobe, compared to comparison subjects(p<0.05). CONCLUSION: These results imply the possible role of the abnormality of cerebrovascular reactivity in the pathophysiology of dementia of Alzheimer's type.

Longitudinal Study of Cerebral Blood Perfusion Deficits in 12 Cases of Dementia of Alzheimer's Typer / 신경정신의학

OBJECTIVES: The purpose of this study was to investigate the pattern of longitudinal changes in cerebral blood perfusion defects using SPECT in patients with dementia of Alzheimer's type . METHOD: Twelve patients with dementia of Alzheimer's type(10 male, 2 female; mean age 73.25+/- 10.62 years), diagnosed by the criteria of the DSM IV and the NINCDS-ADRDA, and ten normal comparison subjects(7 male, 3 female; mean age 75.10+/-5.76 years) were recruited. They were rated by Mini-Mental Status Examination, Mattis dementia Rating Scale, and Hamilton Depression Rating Scale. rCBF(regional cerebral blood flow) was measured using 99mTc-HMPAO SPECT at the initial study in all subjects, but rCBF was remeasured only in the patients after the follow-up period of average 2 years. SPECT scans of dementia patients and comparison subjects were analyzed by three- dimensional volume of interest method. RESULTS: Results were as follows. 1) There were significant perfusion defects in the bilateral frontal and temporoparietal areas in patients with dementia compared with normal comparison subjects at the baseline evaluation. More extensive perfusion defects including left superior frontal and medial temporal areas were observed in the follow-up SPECT scan compared with baseline scan. 2) There was significant negative correlation between rCBF of bilateral temporal lobe at the baseline scan and the rate of decline of scores of MMSE-K and Mattis dementia rating scale. 3) Various areas of the brain showed correlations between rCBF at the baseline scan and the rate of decline of scores of five subscales of Mattis dementia rating scale. CONCLUSIONS: Three-dimensional VOI approach using SPM analysis showed the characteristic perfusion defects and pattern of longitudinal changes in the patients of dementia of Alzheimer's type, which may be overlooked by the conventional region-of-interest technique. This alteration in rCBF may be closely related to the pathophysiological process of dementia of Alzheimer's type.

Clinical Validity of the Chinese Version of Mattis Dementia Rating Scale in Differentiating Dementia of Alzheimer Type in Shanghai / 中国临床心理学杂志

Objective:To assess clinical validity of the Chinese version of Mattis Dementia Rating Scale (DRS) in differentiating dementia of Alzheimer type (AD). Methods:Administered the DRS, mini-mental state examination (MMSE) and clinical dementia rating(CDR) to 61 outpatients with AD and 104 healthy elderly subjects in Shanghai.Results:There was significant correlation between DRS and the total score,and DRS and MMSE.DRS of the AD group had significant correlation with CDR.Its significant correlation with CDR suggested satisfactory concurrent validity of the scale. The optimal DRS cutoff score for AD according to education level revealed a sensitivity of 85%～94% and a specificity of 90%～94%.Conclusion:The DRS is a clinically valid test for the detection of AD and its severity of cognitive impairment.