Bulletin of Graduate School of Education, Okayama University
Published by Graduate School of Education, Okayama University

<Formerly known as>
岡山大学教育学部研究集録 (1号-137号)

Some items are not available because of decision by its author or publisher.

誘発電位による脳機能評価 ―精神遅滞児・者における中心部導出視覚誘発電位の後期成分の検討―

Yanagihara, Masafumi
Hayashi, Yuko
Visual evoked potentials recorded from the vertex were studied in seventy four individuals with mental retardation,ranging from l old to 50 years old. They were classified into 4 groups according to the level of IQ/DQ,and the relation between the late components and the intellectual level was exarnined. In 9 of 74 cases(12.2%),la tency of the N130 component was prolonged and in 7 of 74 cases (9.6%),the P190 component was prolonged. There was,however,no correlation between the number of the cases with prolonged N130 or P190 latency and the level of IQ/DQ. Cases with prolongation in N130 and/or Pl90 were almost exclusively found among those with such complications as cerebral palsy and/or epilepsy,while few cases without complications showed prolongation. From these results,it is suggested that the prolongation in the late components developes reflecting the presence of the organic lesions that have a common causative potent producing cerebral palsy and/or epilepsy.
brain function
mental retardation
visual evoked potentials
cerebral palsy