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1.
Psychiatry Investigation ; : 1054-1060, 2023.
Article in English | WPRIM | ID: wpr-1002736

ABSTRACT

Objective@#Apolipoprotein E (APOE) gene is known to influence cerebral functional connectivity (FC) in Alzheimer’s disease continuum. We investigated association between APOE allotypes and FC, structural connectivity, and cortical thickness in amyloid-PET negative cognitive normal older adults (CN). @*Methods@#A total of 188 CN (37 had ε2/ε2 or ε2/ε3 [ε2 group], 113 had ε3/ε3 [ε3 group], and 38 had ε3/ε4 or ε4/ε4 [ε4 group]) were recruited. Voxel-based morphometry and cortical thickness analysis were used to investigate differences in cortical thickness between three APOE allotypes. To investigate integrity of structural connectivity, we analyzed diffusion weighted imaging using fractional anisotropy and mean diffusivity. In terms of FC, differences of FC in default mode network (DMN) among APOE allotypes were measured using functional magnetic resonance imaging. @*Results@#There were no significant differences in age, sex, education, cerebral beta-amyloid (Aβ) deposition severity, or neuropsychological profiles. No significant differences were found in cortical thickness and structural connectivity among the APOE allotypes. However, FC within the DMN was significantly lower in ε4 and ε2 carriers compared to ε3 homozygotes. @*Conclusion@#This study suggests that both ε4 and ε2 exhibit APOE-associated DMN FC changes before Aβ deposition, structural changes, and neurodegeneration.

2.
Psychiatry Investigation ; : 580-587, 2022.
Article in English | WPRIM | ID: wpr-938960

ABSTRACT

Objective@#Recently data has been accumulated regarding the role of coping strategies in the relationship between stress and sleep quality. Therefore, we set out to identify the mediating effects of coping strategies between stress and sleep quality. @*Methods@#A online-based cross-sectional study was performed using the Perceived Stress Scale-10, the Pittsburgh Sleep Quality Index, and a simplification of the 60-item Coping Orientation to Problems Experienced (Brief COPE) inventory in the nonclinical adult sample. The 24 items of Brief COPE were categorized into four factors (social support, problem solving, avoidance, positive thinking). Then, we used the PROCESS macro to conduct the multiple mediation analysis for the four coping styles as potential mediators in the relationship between stress and sleep quality, and an additional subgroup analysis was examined to identify a gender difference for the mediation effect. @*Results@#As a group, four coping styles mediated significantly the association between perceived stress and poor sleep quality. And avoidance has maintained its significance thought all regression analyses. Finally, this results remained as same in the females. @*Conclusion@#The effect of perceived stress on poor sleep quality was mediated by coping strategies, especially by avoidance. Thus, further research should consider the coping styles of individuals to reduce the influence of stress on sleep quality.

3.
Psychiatry Investigation ; : 326-332, 2022.
Article in English | WPRIM | ID: wpr-926890

ABSTRACT

Objective@#The objectives of this study were to investigate the suicide risk in diabetes patients and evaluate the variations in suicide risk by the duration of diabetes using a large population sample in South Korea. @*Methods@#Data from 6,296 adults in the 2019 Korea National Health and Nutrition Examination Survey were included. The suicidal ideation, suicide plans, and suicidal behavior of diabetes patients were compared to the general population. After classifying the patients into ≤1 year, 2 to 9 years, and ≥10 years of diabetes duration, we evaluated the relationship between the duration of diabetes and the suicide risk. @*Results@#Diabetes patients had higher prevalences of suicidal ideation (9.1%, p<0.001) and suicide plans (3.6%, p<0.001) than the general population. After adjusting for potential confounding factors, suicide plans (adjusted odds ratio [aOR]=2.926, 95% confidence interval [CI]=1.325–6.463) were significantly associated with diabetes. In the 2 to 9 years group of diabetes patients, we found an increase in the risk of suicidal ideation (aOR=2.035, 95% CI=1.129–3.670), suicide plans (aOR=3.507, 95% CI=1.538–7.996), and suicidal behavior (aOR=7.130, 95% CI=2.035–24.978) after adjusting for the covariates. However, no increases in suicide risk were observed ≤1 year and ≥10 years after diabetes diagnosis. @*Conclusion@#In adults, diabetes is associated with an increase in suicide risk. Suicide risk in diabetes patients showed an inverted U-shaped depending upon the duration of diabetes.

4.
Journal of Korean Geriatric Psychiatry ; : 8-11, 2022.
Article in English | WPRIM | ID: wpr-925371

ABSTRACT

Melatonin is a hormone with neuroregulatory, antioxidant and anti-inflammatory properties. Its benevolent effects on Alzheimer’s disease (AD) has been replicated in both animal models and clinical studies. Melatonin was effective in deterring the toxic effects of amyloid beta (Aβ) and reducing tau phosphorylation. Conflicting results exist for the clinical effectiveness of melatonin administration in AD patients. The positive effects of melatonin in AD have mainly been viewed from its role in sleep and circadian rhythm. Several limitations exist in the previous research on the relationship between melatonin and AD. Future research should focus on sharpening methodology, and adopting more expanded, multi-faceted approach, with consideration for melatonin’s antioxidant and anti-inflam-matory properties.

5.
Psychiatry Investigation ; : 69-79, 2021.
Article in English | WPRIM | ID: wpr-875370

ABSTRACT

Objective@#Alzheimer’s disease (AD) is the most common type of dementia and the prevalence rapidly increased as the elderly population increased worldwide. In the contemporary model of AD, it is regarded as a disease continuum involving preclinical stage to severe dementia. For accurate diagnosis and disease monitoring, objective index reflecting structural change of brain is needed to correctly assess a patient’s severity of neurodegeneration independent from the patient’s clinical symptoms. The main aim of this paper is to develop a random forest (RF) algorithm-based prediction model of AD using structural magnetic resonance imaging (MRI). @*Methods@#We evaluated diagnostic accuracy and performance of our RF based prediction model using newly developed brain segmentation method compared with the Freesurfer’s which is a commonly used segmentation software. @*Results@#Our RF model showed high diagnostic accuracy for differentiating healthy controls from AD and mild cognitive impairment (MCI) using structural MRI, patient characteristics, and cognitive function (HC vs. AD 93.5%, AUC 0.99; HC vs. MCI 80.8%, AUC 0.88). Moreover, segmentation processing time of our algorithm (<5 minutes) was much shorter than of Freesurfer’s (6–8 hours). @*Conclusion@#Our RF model might be an effective automatic brain segmentation tool which can be easily applied in real clinical practice.

6.
Mood and Emotion ; (2): 64-73, 2021.
Article in English | WPRIM | ID: wpr-918514

ABSTRACT

Background@#This study aimed to assess the clinical characteristics of patients with major depressive disorder who were rehospitalized within 1 year and to determine whether the 1-year rehospitalization rate varied depending on the type of medication and treatment method. @*Methods@#Clinical characteristics of 531 patients hospitalized for major depressive disorder were assessed. The use and type of antidepressants, antipsychotics, mood stabilizers, and hypnotics were also evaluated. @*Results@#Of the 531 subjects, 68 (12.8%) were rehospitalized within a year. The number of past depressive episodes (1.56±2.67 vs. 0.90±1.18) (p=0.048) and the number of previous psychiatric hospitalizations (0.82±1.93 vs. 0.29±0.83 times) (p=0.029) were high in the 1-year rehospitalization group. The rate of family history of mood disorder (25.0% vs. 13.6%) (p=0.014) and the rate of comorbid personality disorder (16.2% vs. 8.6%) (p=0.049) were also high in the 1-year rehospitalization group. Multiple logistic regression analysis showed that the number of previous psychiatric hospitalizations affected the rate of 1-year rehospitalization (p=0.003). @*Conclusion@#The number of previous psychiatric hospitalizations could be used to predict rehospitalizations of patients with major depressive disorder within 1 year. In addition, family history of mood disorders and comorbidity of personality disorders may affect rehospitalization of such patients.

7.
Journal of Korean Geriatric Psychiatry ; : 76-82, 2021.
Article in English | WPRIM | ID: wpr-915398

ABSTRACT

Objective@#Recent evidence shows that the quantitative value of amyloid-beta (Aβ) deposition below the threshold of Aβ positivi-ty carries biological and clinical significance regarding future cognitive decline. We evaluated whether the quantitative value of sub-threshold Aβ deposition had a significant correlation with neuropsychological test scores in cognitively normal older adults without the APOE ε4 allele. @*Methods@#Sixty cognitively normal APOE ε4 allele non-carriers with negative Aβ retention aged 60 to 85 years were included in this study. We assessed neuropsychological performance with the Korean version of the Consortium to Establish a Registry for Al-zheimer’s Disease (CERAD-K) and obtained standardized [ 18 F] flutemetamol uptake values in the pons as a reference (SUVR PONS), evaluated with PET. Multiple regression analyses were conducted to assess the effect of global and regional Aβ load on cognitive performance, adjusting for age, sex, years of education, and volumes of white matter hyperintensities. @*Results@#We found that Aβ deposition in the precuneus, posterior cingulate cortex, and parietal lobe had a significant association with the total CERAD-K scores. There was also a significant correlation between the SUVR PONS in the precuneus and the CERAD-K total score after Bonferroni correction. @*Conclusion@#Subthreshold Aβ retention in the core brain regions of the default mode network could affect cognitive functions in the cognitively normal APOE ε4 non-carriers, considered to be the lowest risk group for Alzheimer’s disease (AD).

8.
Psychiatry Investigation ; : 523-529, 2021.
Article in English | WPRIM | ID: wpr-903199

ABSTRACT

Objective@#Despite a high prevalence of dementia in older adults hospitalized with severe acute respiratory syndrome coronavirus 2 infection (SARS-CoV-2), or so called COVID-19, research investigating association between preexisting diagnoses of dementia and prognosis of COVID-19 is scarce. We aimed to investigate treatment outcome of patients with dementia after COVID-19. @*Methods@#We explored a nationwide cohort with a total of 2,800 subjects older than 50 years who were diagnosed with COVID-19 between January and April 2020. Among them, 223 patients had underlying dementia (dementia group). We matched 1:1 for each dementia- non-dementia group pair yielding 223 patients without dementia (no dementia group) using propensity score matching. @*Results@#Mortality rate after COVID-19 was higher in dementia group than in no dementia group (33.6% vs. 20.2%, p=0.002). Dementia group had higher proportion of patients requiring invasive ventilatory support than no dementia group (34.1% vs. 22.0%, p=0.006). Multivariable analysis showed that dementia group had a higher risk of mortality than no dementia group (odds ratio=3.05, p<0.001). We also found that patients in dementia group had a higher risk of needing invasive ventilatory support than those in no dementia group. @*Conclusion@#Our results suggest that system including strengthen quarantines are required for patients with dementia during the COVID- 19 pandemic.

9.
Psychiatry Investigation ; : 523-529, 2021.
Article in English | WPRIM | ID: wpr-895495

ABSTRACT

Objective@#Despite a high prevalence of dementia in older adults hospitalized with severe acute respiratory syndrome coronavirus 2 infection (SARS-CoV-2), or so called COVID-19, research investigating association between preexisting diagnoses of dementia and prognosis of COVID-19 is scarce. We aimed to investigate treatment outcome of patients with dementia after COVID-19. @*Methods@#We explored a nationwide cohort with a total of 2,800 subjects older than 50 years who were diagnosed with COVID-19 between January and April 2020. Among them, 223 patients had underlying dementia (dementia group). We matched 1:1 for each dementia- non-dementia group pair yielding 223 patients without dementia (no dementia group) using propensity score matching. @*Results@#Mortality rate after COVID-19 was higher in dementia group than in no dementia group (33.6% vs. 20.2%, p=0.002). Dementia group had higher proportion of patients requiring invasive ventilatory support than no dementia group (34.1% vs. 22.0%, p=0.006). Multivariable analysis showed that dementia group had a higher risk of mortality than no dementia group (odds ratio=3.05, p<0.001). We also found that patients in dementia group had a higher risk of needing invasive ventilatory support than those in no dementia group. @*Conclusion@#Our results suggest that system including strengthen quarantines are required for patients with dementia during the COVID- 19 pandemic.

10.
Psychiatry Investigation ; : 1013-1020, 2020.
Article | WPRIM | ID: wpr-832597

ABSTRACT

Objective@#Previous studies investigating association of alcohol intake and fracture risk in elderly yielded conflicting results. We first examined the association between alcohol intake and total fracture risk in elderly subjects and further analyzed whether the association varied by fracture locations. @*Methods@#This is a nationwide population-based cohort study which included all people aged 66 (n=1,431,539) receiving the National Screening Program during 2009–2014. Time-to-event were defined as duration from study recruitment, the day they received health screening, to the occurrence of fracture. @*Results@#Total fracture was significantly lower in mild drinkers [adjusted hazard ratio (aHR)=0.952; 95% confidence interval (95% CI) =0.931–0.973] and higher in heavy drinkers (aHR=1.246; 95% CI=1.201–1.294) than non-drinkers. Risk pattern of alcohol consumption and fracture differed according to affected bones. Similar J-shaped trends were observed for vertebra fractures, but risk of limb fracture showed a linear relationship with alcohol intake. For hip fracture, risk decrement was more pronounced in mild and moderate drinkers, and significant increment was noted only in very severe drinkers [≥60 g/day; (aHR)=1.446; 1.162–1.801]. @*Conclusion@#Light to moderate drinking generally lowered risk of fractures, but association between alcohol and fracture risk varied depending on the affected bone lesions.

11.
Psychiatry Investigation ; : 1048-1059, 2020.
Article in English | WPRIM | ID: wpr-832585

ABSTRACT

Objective@#We aim to present a clinical guideline for the diagnosis and treatment of insomnia in adults by reviewing and integrating existing clinical guidelines. The purpose of this guideline is to assist clinicians who perform evidence-based insomnia treatment. @*Methods@#We selected literature that may be appropriate for use in guideline development from evidence-based practice guidelines that have been issued by an academic or governmental institution within the last five years. The core question of this guideline was made in sentence form including Patient/Problem, Intervention, Comparison, Outcome (PICO) elements. After searching PubMed, EMBASE, and medical guideline issuing agencies, three guidelines were judged to be the most appropriately reviewed, up-to-date, and from trusted sources. @*Results@#The Appraisal of Guidelines for Research and Evaluation (AGREE) II tool was used to evaluate the quality of the three clinical guidelines. The final outcome of the guideline development process is a total of 15 recommendations that report the strength of the recommendation, the quality of evidence, a summary of content, and considerations in applying the recommendation. @*Conclusion@#It is vital for clinical guidelines for insomnia to be developed and continually updated in order to provide more accurate evidence-based treatments to patients.

12.
Psychiatry Investigation ; : 613-619, 2020.
Article | WPRIM | ID: wpr-832539

ABSTRACT

Objective@#We aimed to explore the impact of moderate intensity exercise on the cortical thickness and subcortical volumes of preclinical Alzheimer’s disease (AD) patients. @*Methods@#Sixty-three preclinical AD patients with magnetic resonance imaging (MRI) and 18-florbetaben positron emission tomography (PET) data were enrolled in the study. Information on demographic characteristics, cognitive battery scores, self-reported exercise habits were attained. Structural magnetic resonance images were analyzed and processed using Freesurfer v6.0. @*Results@#Compared to Exercise group, Non-Exercise group demonstrated reduced cortical thickness in left parstriangularis, rostral middle frontal, entorhinal, superior frontal, lingual, superior parietal, lateral occipital, inferior parietal gyrus, temporal pole, precuneus, insula, fusiform gyrus, right precuneus, superiorparietal, lateral orbitofrontal, rostral middle frontal, medial orbitofrontal, superior frontal, lingual, middle temporal gyrus, insula, supramarginal, parahippocampal, paracentral gyrus. Volumes of right thalamus, caudate, putamen, pallidum, hippocampus, amygdala were also reduced in Non-Exercise group. @*Conclusion@#Moderate intensity exercise affects cortical and subcortical structures in preclinical AD patients. Thus, physical exercise has a potential to be an effective intervention to prevent future cognitive decline in those at high risk of AD.

13.
Psychiatry Investigation ; : 621-626, 2020.
Article | WPRIM | ID: wpr-832537

ABSTRACT

Orexin’s role in human cognition has recently been emphasized and emerging evidences indicate its close relationship with Alzheimer’s disease (AD). This review aimed to demonstrate recent research on the relationship between orexin and AD. Orexin’s role in stress regulation and memory is discussed, with significant findings related to sexual disparities in stress response, with potential clinical implications pertaining to AD pathology. There are controversies regarding the orexin levels in AD patients, but the role of orexin in the trajectory of AD is still emphasized in recent literatures. Orexin is also accentuated in the context of tau pathology, and orexin as a potential therapeutic target for AD is frequently discussed. Future directions with regard to the relationship between orexin and AD are suggested: 1) consideration for AD trajectory in the measurement of orexin levels, 2) the need for objective measure such as polysomnography and actigraphy, 3) the need for close observation of cognitive profiles of orexin-deficient narcolepsy patients, 4) the need for validation studies by neuroimaging 5) the need for taking account sexual disparities in orexinergic activiation, and 6) consideration for orexin’s role as a stress regulator. The aforementioned new perspectives could help unravel the relationship between orexin and AD.

14.
Psychiatry Investigation ; : 786-795, 2020.
Article | WPRIM | ID: wpr-832496

ABSTRACT

Objective@#We aimed to explore the differential impact of cigarette smoking on fracture risks in SCD and dementia. @*Methods@#A nationwide population-based cohort study design was used. Out of all the people aged 66 (n=1,555,103) who went through the National Screening Program from 2009–2014, 968,240 participants with eligible data were included in the study. Time-to-event was calculated as the duration between the NSPTA and fracture incidence. Cox proportional-hazard regression analyses were conducted to evaluate the risk of fractures. @*Results@#Increased risk of all [adjusted hazard ratio (aHR)=1.184; 95% confidence interval (CI)=1.184, 1.093–1.283], hip (aHR=1.518; 95% CI=1.168–4.972), vertebral (aHR=1.235; 95% CI=1.101–1.386) fractures were increased in current smokers with more than 20 or more pack years (≥20 py) of SCD group, after adjusting for all relevant confounding factors. In dementia group, however, current smokers ≥20 py were at reduced risk of hip fractures (aHR=0.249; 95% CI=0.089–0.97). @*Conclusion@#There was a disparate influence of cigarette smoking on the fracture risks in SCD and dementia group. Further studies are warranted to explicate this phenomenon, and personalized preventive measures according to one’s cognitive status are imperative, since risk factors of fractures can exert disparate influence on patients at different stage of cognitive trajectory.

15.
Journal of Korean Geriatric Psychiatry ; : 69-74, 2020.
Article in English | WPRIM | ID: wpr-836009

ABSTRACT

Objective@#Sleep affects systemic inflammation and amyloid deposition, and sleep disturbance is known to be a risk factor for cognitive decline. To date, literatures on the relationship between peripheral inflammatory markers and sleep in Alzheimer’s de-mentia and mild cognitive impairment patients have been scarce. The aim of this study was to determine the correlation between sleep and C-reactive protein (CRP) in Alzheimer’s dementia and amnestic mild cognitive impairment patients. @*Methods@#A total of 81 patients were divided in to four groups: amyloid negative healthy control, amyloid negative amnestic mild cognitive impairment, amyloid positive amnestic mild cognitive impairment, and amyloid positive Alzheimer’s dementia.Demographic data and cognitive measurement through the Consortium to Establish a Registry for Alzheimer’s Disease were conducted. Amyloid positivity status was attained through positron emission tomography scans using [18F]-flutemetamol. The quality of sleep was evaluated by the sleep item of Korean Neuropsychiatric Inventory (K-NPI-SLEEP), and peripheral blood tests were conducted to measure CRP. @*Results@#There was no statistically difference in CRP levels or K-NPI-SLEEP scores among four groups. Moreover, there was no association between K-NPI-SLEEP and CRP in four groups. @*Conclusion@#Since K-NPI-SLEEP score shows overall, subjective sleep problems, further follow-up studies in consideration for objective sleep studies to unravel the relationship of peripheral inflammatory markers and sleep in amnestic mild cognitive impairment and Alzheimer’s dementia patients.

16.
Mood and Emotion ; (2): 9-17, 2020.
Article in English | WPRIM | ID: wpr-918504

ABSTRACT

Background@#The purpose of this study was to measure several mental health variables according to HbA1c level and examine their relationship among diabetic patients. @*Methods@#Total 89 outpatients who attended diabetes education program at St. Vincent’s Hospital, The Catholic University of Korea College of Medicine, were enrolled this study. The Beck Depression Inventory (BDI), State-Trait Anxiety Inventory, Stress Response Inventory (SRI), abbreviated version of World Health Organization Quality of Life assessment instrument (WHOQOL-BREF), Insomnia Severity Index, and Epworth Sleepiness Scale (ESS) were administered to all patients. Significant differences between groups were assessed by t-test and chi-squared test. Pearson correlation and multiple linear regression analyses were used to identify the variables that affect HbA1c levels. @*Results@#The well-controlled group had a significantly lower BDI score than the poorly controlled group. The wellcontrolled group also showed significantly lower SRI and ESS. HbA1c, BDI, SRI, and ESS were positively correlated. Duration and BDI were the only variables affecting HbA1c levels. @*Conclusion@#Emphasis should be given to the identification and management of mental health problems, including especially depressive symptoms in patients with diabetes.

17.
Psychiatry Investigation ; : 199-205, 2019.
Article in English | WPRIM | ID: wpr-760917

ABSTRACT

OBJECTIVE: We aimed to develop the clinical guideline for headache by the systematic review and synthesis of existing evidence-based guidelines. The purpose of developing the guideline was to improve the appropriateness of diagnosis and treatment of headache disorder, and consequently, to improve patients’ pain control and quality of life. The guideline broadly covers the differential diagnosis and treatment of tension-type headache, migraine, cluster headache, and medication-overuse headache. METHODS: This is a methodological study based on the ADAPTE methodology, including a systematic review of the literature, quality assessment of the guidelines using the Appraisal of Clinical Guidelines for REsearch & Evaluation II (AGREE II) Instrument, as well as an external review using a Delphi technique. The inclusion criteria for systematic search were as follows: topic-relevant, up-to-date guidelines including evidence from within 5 years, evidence-based guidelines, guidelines written in English or Korean, and guidelines issued by academic institutions or government agencies. RESULTS: We selected five guidelines and conducted their quality assessment using the AGREE II Instrument. As a result, one guideline was found to be eligible for adaptation. For 13 key questions, a total of 39 recommendations were proposed with the grading system and revised using the nominal group technique. CONCLUSION: Recommendations should be applied to actual clinical sites to achieve the ultimate goal of this guideline; therefore, follow-up activities, such as monitoring of guideline usage and assessment of applicability of the recommendations, should be performed in the future. Further assessment of the effectiveness of the guideline in Korea is needed.


Subject(s)
Cluster Headache , Delphi Technique , Diagnosis , Diagnosis, Differential , Follow-Up Studies , Government Agencies , Headache Disorders , Headache , Korea , Methods , Migraine Disorders , Quality of Life , Tension-Type Headache
18.
Psychiatry Investigation ; : 751-758, 2019.
Article in English | WPRIM | ID: wpr-760905

ABSTRACT

OBJECTIVE: This study aimed to assess the anxiety and depression in patients undergoing hematopoietic stem cell transplantation (HSCT). METHODS: Eighty-seven adult patients with various hematologic diseases, who were scheduled to receive autologous or allogeneic HSCT, were enrolled. The M.D. Anderson Symptom Inventory and the Hospital Anxiety Depression Scale were applied prospectively at hospital admission (D-14), on the day of transplantation (D day), and at 7 (D7) and 14 days (D14) after transplantation. RESULTS: The severity of both anxiety and depressive symptoms increased over time, with a peak at D7, and then showed a downturn at D14. Physical distresses also started with mild intensity at base line, which were continuously aggravated until D7, and then a partial recovery afterwards. Approximately, 52% of the participants had significantly high anxiety or depression before the start of HSCT. The occurrence of aggravation of pain, nausea, shortness of breath, and lack of appetite was associated with the development of anxiety during isolation period. The patients with significant baseline anxiety had higher scores on fatigue and shortness of breath items at D7 compared to those without. CONCLUSION: Our finding suggests the importance of psychiatric approaches, including preventive measures, for the patients undergoing HSCT.


Subject(s)
Adult , Humans , Anxiety , Appetite , Depression , Dyspnea , Fatigue , Hematologic Diseases , Hematologic Neoplasms , Hematopoietic Stem Cell Transplantation , Hematopoietic Stem Cells , Hospitalization , Nausea , Prospective Studies
19.
Clinical Psychopharmacology and Neuroscience ; : 144-152, 2018.
Article in English | WPRIM | ID: wpr-714657

ABSTRACT

OBJECTIVE: Although several prior works showed the white matter (WM) integrity changes in amnestic mild cognitive impairment (aMCI) and Alzheimer's disease, it is still unclear the diagnostic accuracy of the WM integrity measurements using diffusion tensor imaging (DTI) in discriminating aMCI from normal controls. The aim of this study is to explore diagnostic validity of whole brain automated probabilistic tractography in discriminating aMCI from normal controls. METHODS: One hundred-two subjects (50 aMCI and 52 normal controls) were included and underwent DTI scans. Whole brain WM tracts were reconstructed with automated probabilistic tractography. Fractional anisotropy (FA) and mean diffusivity (MD) values of the memory related WM tracts were measured and compared between the aMCI and the normal control groups. In addition, the diagnostic validities of these WM tracts were evaluated. RESULTS: Decreased FA and increased MD values of memory related WM tracts were observed in the aMCI group compared with the control group. Among FA and MD value of each tract, the FA value of left cingulum angular bundle showed the highest area under the curve (AUC) of 0.85 with a sensitivity of 88.2%, a specificity of 76.9% in differentiating MCI patients from control subjects. Furthermore, the combination FA values of WM integrity measures of memory related WM tracts showed AUC value of 0.98, a sensitivity of 96%, a specificity of 94.2%. CONCLUSION: Our results with good diagnostic validity of WM integrity measurements suggest DTI might be promising neuroimaging tool for early detection of aMCI and AD patients.


Subject(s)
Humans , Alzheimer Disease , Anisotropy , Area Under Curve , Brain , Diffusion Tensor Imaging , Memory , Cognitive Dysfunction , Neuroimaging , Sensitivity and Specificity , White Matter
20.
Clinical Psychopharmacology and Neuroscience ; : 109-113, 2018.
Article in English | WPRIM | ID: wpr-739454

ABSTRACT

Limbic encephalitis (LE) is characterized by short-term memory loss, disorientation, agitation, seizures, and histopathological evidence of medial temporal lobe inflammation. Leucine-rich, glioma inactivated 1 (LGI-1) is an auto-antigen associated with LE. We report a 37-year-old male patient with LGI-1-related LE who presented with recurrent episodes of selective amnesia, seizure-like activity, confusion, and personality change. His symptoms were significantly improved with steroid therapy. Thorough differential diagnosis with consideration for autoimmune encephalitis should be in patients with presentation of symptoms, such as memory impairment, personality change and seizure-like activity, especially when other neurological diagnoses are excluded.


Subject(s)
Adult , Humans , Male , Amnesia , Diagnosis , Diagnosis, Differential , Dihydroergotamine , Encephalitis , Glioma , Inflammation , Limbic Encephalitis , Memory , Memory, Short-Term , Seizures , Temporal Lobe
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