Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 5 de 5
Filter
1.
Arq. neuropsiquiatr ; 72(9): 680-686, 09/2014. tab, graf
Article in English | LILACS | ID: lil-722138

ABSTRACT

Objective To investigate central auditory processing in children with unilateral stroke and to verify whether the hemisphere affected by the lesion influenced auditory competence. Method 23 children (13 male) between 7 and 16 years old were evaluated through speech-in-noise tests (auditory closure); dichotic digit test and staggered spondaic word test (selective attention); pitch pattern and duration pattern sequence tests (temporal processing) and their results were compared with control children. Auditory competence was established according to the performance in auditory analysis ability. Results Was verified similar performance between groups in auditory closure ability and pronounced deficits in selective attention and temporal processing abilities. Most children with stroke showed an impaired auditory ability in a moderate degree. Conclusion Children with stroke showed deficits in auditory processing and the degree of impairment was not related to the hemisphere affected by the lesion. .


Objetivo Investigar as habilidades de processamento auditivo central em crianças com acidente vascular cerebral (AVC) unilateral e verificar se o hemisfério cerebral afetado influiu na competência auditiva. Método 23 crianças (13 meninos) entre 7 e 16 anos foram avaliados através dos testes de fala com ruído (fechamento auditivo); dicótico de dígitos e de dissílabos alternados (atenção seletiva); padrão temporal de frequência e duração (processamento temporal) e seus resultados comparados aos de crianças controles. A competência auditiva foi estabelecida segundo o desempenho na habilidade de análise auditiva. Resultados Foi constatado desempenho similar entre os grupos na habilidade de fechamento auditivo e défices acentuados nas habilidades de atenção seletiva e processamento temporal. A maioria das crianças com AVC apresentou comprometimento da habilidade auditiva em grau moderado. Conclusão Crianças com AVC apresentaram alterações do processamento auditivo e o grau do comprometimento não se relacionou com o hemisfério afetado pela lesão. .


Subject(s)
Adolescent , Child , Female , Humans , Male , Auditory Perception/physiology , Stroke/complications , Stroke/physiopathology , Age Factors , Auditory Diseases, Central/etiology , Auditory Diseases, Central/physiopathology , Auditory Pathways/physiopathology , Case-Control Studies , Hearing Tests , Severity of Illness Index , Time Factors
2.
Pró-fono ; 22(2): 107-113, abr.-jun. 2010. tab
Article in English, Portuguese | LILACS | ID: lil-554276

ABSTRACT

BACKGROUND: auditory evoked potentials (AEP) assess the neuroelectric activity on the auditory pathway -from the auditory nerve to the cerebral cortex - in response to an acoustic stimulus or event. Studies have demonstrated electrophysiological abnormalities in individuals with HIV/AIDS. AIM: to characterize the hearing electrophysiological manifestations in adults with HIV/AIDS by comparing the results obtained in the group exposed to antiretroviral therapy with those obtained in the group not exposed to such treatment. METHOD: electrophysiological evaluation of hearing (Auditory Brainstem Response - ABR, Auditory Middle Latency Reponse - AMLR and P300) was conducted in 56 individuals with HIV/AIDS: 24 participants composed group I (not exposed to antiretroviral treatment) and 32 participants composed group II (exposed to treatment). RESULTS: alterations in every AEP were observed in individuals with HIV/ AIDS, especially in the ABR. Indeed, the group exposed to antiretroviral treatment presented more alterations. CONCLUSION: individuals with HIV/AIDS may present alterations on the central and peripheral auditory nervous system. The group exposed to antiretroviral therapy presents more alterations on the brainstem auditory pathway.


TEMA: os potenciais evocados auditivos (PEA) avaliam a atividade neuroelétrica na via auditiva, desde o nervo auditivo até o córtex cerebral, em resposta a um estímulo ou evento acústico. Estudos demonstram anormalidades eletrofisiológicas em indivíduos com HIV/AIDS. OBJETIVO: caracterizar as manifestações eletrofisiológicas da audição em adultos com HIV/AIDS, comparando os resultados obtidos no grupo exposto a tratamento anti-retroviral com os obtidos no grupo não exposto a tratamento. MÉTODO: realizada avaliação eletrofisiológica da audição (PEATE, PEAML e P300) em 56 indivíduos portadores do HIV/AIDS, sendo 24 do Grupo I (não expostos ao tratamento anti-retroviral) e 32 do Grupo II (expostos ao tratamento). RESULTADOS: foram encontradas alterações em todos os PEA nos indivíduos com HIV/AIDS, principalmente no PEATE; sendo que neste, o grupo exposto ao tratamento antiretroviral apresentou mais alterações. CONCLUSÃO: indivíduos com HIV/AIDS podem apresentar alterações no sistema nervoso auditivo periférico e central, sendo que o grupo exposto a tratamento anti-retroviral apresenta mais alterações na via auditiva em tronco encefálico.


Subject(s)
Adolescent , Adult , Humans , Middle Aged , Young Adult , Antiretroviral Therapy, Highly Active , /physiology , Evoked Potentials, Auditory/physiology , HIV Infections/physiopathology , Hearing Loss/diagnosis , Acoustic Stimulation , Audiometry, Pure-Tone , Acquired Immunodeficiency Syndrome/complications , Acquired Immunodeficiency Syndrome/drug therapy , Antiretroviral Therapy, Highly Active/adverse effects , Auditory Diseases, Central/diagnosis , Auditory Diseases, Central/etiology , Case-Control Studies , /drug effects , Evoked Potentials, Auditory/drug effects , HIV Infections/drug therapy , Hearing Loss/etiology , Young Adult
3.
Rev. otorrinolaringol. cir. cabeza cuello ; 69(3): 271-280, dic. 2009. tab, graf
Article in Spanish | LILACS | ID: lil-559569

ABSTRACT

Los hallazgos clínicos que definen una neuropatía/des sincronía (NA/DA) son la integridad de las células ciliadas evidenciado, mediante la presencia de emisiones otoacústicas evocadas (EOAe) y/o la presencia de potenciales microfónicos cocleares (PMIC), junto con la ausencia de actividad neural evocada a nivel del VIII par craneano (potencial de acción compuesto) y tronco cerebral (potencial evocado auditivo de tronco (PEAT)). Las condiciones clínicas relacionadas con una NA/DA incluyen a la hiperbilirrubinemia, enfermedades neurovegetativas (ejemplo ataxia de Friedreich), síndrome de Charcot-Marie-Tooth así como otras neuropatías sensoriomotoras, desórdenes mitocondriales y neuropatías isquémica-hipóxicas como resultados de asfixia. El desarrollo de las habilidades auditivas y comunicacionales pueden estar comprometidas en forma importante en los niños con aparición prelingual de una NA/DA, mayor es aún este compromiso al no existir un perfil pronóstico preestablecido del desarrollo y resultados en el tratamiento de este desorden. En la actualidad existen múltiples estudios en donde se ha observado que hasta 50 por ciento de los pacientes con NA/DA presentan algún grado de beneficio al usar audífonos por lo que se sugiere que sistemas de amplificación como los audífonos o incluso implante coclear deberían ser el primer paso en el proceso de (re)habilitación.


The clinical findings that define an auditory neuropathy/dyssynchrony (AN/Dys) are the integrity of the outer hair cells demonstrated by the presence of evoked otoacoustics emissions (OAEe) and/or the presence of cochlear microphonic potential (CMP) along with the absence of neural activity evoked at level of VIII nerve (action potential compound) and brainstem (Auditory Brainstem Response, ABR). The clinical conditions related to an AN they include hiperbilirrubinemia, neurodegenerative diseases (eg ataxia of Friedreich), Charcot-Marie-Tooth syndrome as well as other sensoriomotor neuropathies, mitocondrial disorders and hypoxic neuropathy as perinatal asphyxia. The development of the auditory and communicational abilities can be compromise in children with prelingual onset of an AN/Dys, the development and results of treatment of this disorder is still this commitment when not existing a profile prognosis. At the present time multiple studies have been observed that until a 50 percent of the patients with AN present some degree of benefit using hearing aids, reason why it suggests amplification systems as the hearing aids or even cochlear implant would have to be the first step in the process of (re) habilitation of these patients.


Subject(s)
Humans , Auditory Diseases, Central/diagnosis , Auditory Diseases, Central/etiology , Auditory Diseases, Central/therapy , Audiometry, Evoked Response , Otoacoustic Emissions, Spontaneous/physiology , Auditory Diseases, Central/epidemiology , Hyperbilirubinemia/complications , Hypoxia-Ischemia, Brain/complications , Hereditary Sensory and Motor Neuropathy/complications , Evoked Potentials, Auditory, Brain Stem/physiology , Prevalence
4.
Audiology. 2008; 16 (2): 30-37
in English, Persian | IMEMR | ID: emr-85932

ABSTRACT

Hyperbilirubinemia during the neonatal period is known to be an important risk factor for neonatal auditory impairment, and may reveal as a permanent brain damage, if no proper therapeutic intervention is considered. In the present study some electroacoustic and electrophysiologic tests were used to evaluate function of auditory system in a group of children with severe neonatal Jaundice. Forty five children with mean age of 16.1 +/- 14.81 months and 17 mg/dl and higher bilirubin level were studied, and the transient evoked otoacoustic emission, acoustic reflex, auditory brainstem response and auditory steady-state response tests were performed for them. The mean score of bilirubin was 29.37 ' 8.95 mg/dl. It was lower than 20 mg/dl in 22.2%, between 20-30 mg/dl in 24.4% and more than 30 mg/dl in 48.0% of children. No therapeutic intervention in 26.7%, phototherapy in 44.4%, and blood exchange in 28.9% of children were reported. 48.9% hypoxia and 26.6% preterm birth history was shown too. TEOAEs was recordable in 71.1% of cases. The normal result in acoustic reflex, ABR and ASSR tests was shown just in 11.1% of cases. The clinical symptoms of auditory neuropathy were revealed in 57.7% of children. Conducting auditory tests sensitive to hyperbilirubinemia place of injury is necessary to inform from functional effect and severity of disorder. Because the auditory neuropathy/ dys-synchrony is common in neonates with hyperbilirubinemic, the OAEs and ABR are the minimum essential tests to identify this disorder


Subject(s)
Humans , Kernicterus , Auditory Diseases, Central/etiology , Otoacoustic Emissions, Spontaneous
5.
Pró-fono ; 18(2): 171-176, maio-ago. 2006. tab
Article in Portuguese, English | LILACS | ID: lil-435698

ABSTRACT

TEMA: potenciais evocados auditivos de média e longa latências. OBJETIVO: verificar a ocorrência de alterações nos potenciais evocados auditivos de média e longa latências em indivíduos adultos portadores da síndrome da imunodeficiência adquirida (AIDS). MÉTODO: foram obtidos os potenciais evocados auditivos de média e longa latências em oito indivíduos com AIDS, de 10 a 51 anos de idade, que apresentavam audição normal ou até perda auditiva neurossensorial de grau moderado e resultados normais na Audiometria de Tronco Encefálico, comparando os resultados com os obtidos no grupo controle constituído por 25 indivíduos, de 19 a 24 anos de idade, sem queixas auditivas e com audição dentro da normalidade, bem como com resultados normais na Audiometria de Tronco Encefálico. RESULTADOS: foram analisadas as médias das latências e amplitudes da onda Pa, nas modalidades contralaterais C3/A2 e C4/A1, e da latência da onda P300. Não foram observadas diferenças estatisticamente significantes com relação às médias da amplitude e latência da onda Pa entre os grupos, embora tenha sido observado um aumento da latência e diminuição da amplitude de tal onda, ainda que não estatisticamente significante, para o grupo estudo na modalidade C3/A2. A latência da onda P300 mostrou-se significantemente aumentada para o lado esquerdo no grupo estudo, sendo também possível observar um aumento da latência, embora não estatisticamente significante, para o lado direito. CONCLUSÃO: indivíduos adultos com AIDS não apresentam alterações no potencial evocado auditivo de média latência e apresentam alterações no potencial cognitivo sugerindo, desta forma, comprometimento da via auditiva em regiões corticais e déficit no processamento cognitivo das informações auditivas nesta população. Tais achados reforçam a importância de uma investigação minuciosa da função auditiva em indivíduos com AIDS auxiliando, desta forma, no delineamento da conduta terapêutica junto a estes pacientes.


BACKGROUND: middle and late latency auditory evoked potentials. AIM: to verify the occurrence of middle and late latency auditory evoked potentials disorders in adults with Acquired Immunodeficiency Syndrome (AIDS). METHOD: middle and late latency auditory evoked potentials of 8 individuals with AIDS, with ages ranging from 10 to 51 years, with normal hearing, or with sensoryneural hearing losses up to moderate, and normal results in the Auditory Brainstem Response, comparing the results with the responses obtained for a control group which was composed by 25 individuals, with ages ranging from 19 to 24 years, with no hearing complaints and with normal hearing and normal results in the Auditory Brainstem Response. RESULTS: the Pa wave latency and amplitude averages in the C3/A2 and C4/A1 modalities, and the average of the P300 wave were analyzed. No significant differences were observed in the Pa wave amplitude and latency averages between the groups, although a non-statistically significant increase was observed in the latency and a decrease in the amplitude of such wave for the research group in the C3/A2 modality. The latency of the P300 wave was significantly longer to the left for the research group. It was also observed a longer latency to the right, although this was not statistically significant. CONCLUSION: adult individuals with AIDS do not present alterations in the middle latency auditory evoked potential and do present alterations in the cognitive potential, indicating a disorder in the cortical regions of the auditory pathway and a deficit in the cognitive processing of auditory information for this population. Such findings stress the importance of a careful investigation of the auditory function of individuals with AIDS, thus favoring the therapeutic planning.


Subject(s)
Adult , Female , Humans , Male , Middle Aged , Acquired Immunodeficiency Syndrome/complications , Auditory Diseases, Central/etiology , /physiology , Evoked Potentials, Auditory/physiology , Acoustic Stimulation , Auditory Pathways , Cognition Disorders/etiology , Reaction Time
SELECTION OF CITATIONS
SEARCH DETAIL