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Age-related functional differences between auditory cortices: a whole-head MEG study.
Pekkonen, E; Huotilainen, M; Virtanen, J; Sinkkonen, J; Rinne, T; Ilmoniemi, R J; Näätänen, R.
Afiliação
  • Pekkonen E; Department of Psychology, University of Helsinki, Finland.
Neuroreport ; 6(13): 1803-6, 1995 Sep 11.
Article em En | MEDLINE | ID: mdl-8541486
Auditory evoked magnetic fields (AEFs) were recorded from 10 healthy younger and 10 older subjects using a whole-head magnetometer. Two blocks of tone pips were presented to the left ear with constant inter-stimulus intervals (ISIs) of 0.5 and 2.5 s. The amplitude of P50m, unlike that of N100m, was larger in the older subjects. In both groups, the peak latencies of P50m and N100m responses were significantly shorter over the contralateral than ipsilateral cortex. The interhemispheric latency difference of N100m was significantly increased with age. These findings suggest that ageing delays signal processing in the ipsilateral auditory cortex and that ageing affects consecutive AEFs in a different manner.
Assuntos
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Base de dados: MEDLINE Assunto principal: Córtex Auditivo / Envelhecimento / Potenciais Evocados Auditivos Limite: Adult / Aged / Aged80 / Female / Humans / Male / Middle aged Idioma: En Ano de publicação: 1995 Tipo de documento: Article
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Base de dados: MEDLINE Assunto principal: Córtex Auditivo / Envelhecimento / Potenciais Evocados Auditivos Limite: Adult / Aged / Aged80 / Female / Humans / Male / Middle aged Idioma: En Ano de publicação: 1995 Tipo de documento: Article