DIFFERENTIAL ACTIVATION OF RIGHT AND LEFT POSTERIOR SYLVIAN REGIONS BY SEMANTIC AND PHONOLOGICAL TASKS - A POSITRON-EMISSION TOMOGRAPHY STUDY IN NORMAL HUMAN-SUBJECTS

被引：184

作者：

DEMONET, JF ^{[1
]}

PRICE, C ^{[1
]}

WISE, R ^{[1
]}

FRACKOWIAK, RSJ ^{[1
]}

机构：

[1] HAMMERSMITH HOSP, MRC, CYCLOTRON UNIT, LONDON W12 0HS, ENGLAND

来源：

NEUROSCIENCE LETTERS | 1994年 / 182卷 / 01期

关键词：

CEREBRAL BLOOD FLOW; POSITRON-EMISSION TOMOGRAPHY; BRAIN ACTIVATION; LANGUAGE; HUMAN MEMORY;

D O I：

10.1016/0304-3940(94)90196-1

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

A previous study of brain activation in normal subjects during a phonological (Phonemes) task and a lexical semantic (Words) task using positron-emission tomography [3] is complemented by new data after a method for image realignment was applied [17]. The pattern of cerebral blood flow increases associated with Words compared with Phonemes, involved several foci of activation but these were not exclusively distributed in the left hemisphere as it also included the right angular gyrus, suggesting a participation of the right hemisphere in lexical semantic processes. Conversely, by comparison to Words, Phonemes activated left-sided perisylvian regions, involving the inferior part of the left supramarginal gyrus, in accordance with previous results on verbal short-term memory [12].

引用

页码：25 / 28

页数：4

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