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Cerebral Hemispheric Asymmetry in Humans: Cortical Speech Zones in 100 Adult and 100 Infant Brains

Wada, Juhn A.·1975·Archives of Neurology

Abstract

Morphological asymmetry of the frontal operculum and temporal planum becomes measurable at the 29th week of gestation. There is evidence of subsequent differential development of the planum in favor of the left, with the left planum larger than the right. While both the frontal operculum and left planum were always present, the right planum ranged in size from absent (10%)to larger than the left (about 10%). Females predominated (P less than .05) in the latter group. The findings suggest that (1) a higher percentage of persons may have right-sided cerebral representation for speech than has been assumed previously; (2) a predetermined morphological asymmetry contributes to establishing the ultimate pattern of cerebral speech representation following an early insult to a predisposed hemisphere; and (3) it is necessary to scrutinize clinical material for the differential organization of hemispheric development between sexes.

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Metadata

Authors
Wada, J. A.
Venue
Archives of Neurology
Published
1975-04-01
Volume
32
Issue
4
Pages
239
ISSN
0003-9942 (ISSN-L)
OpenAlex
W2023171362
Cited by
917
References
0
FWCI
17.87
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Cerebral Hemispheric Asymmetry in Humans: Cortical Speech Zones in 100 Adult and 100 Infant Brains. https://app.cochat.ai/papers/10.1001/archneur.1975.00490460055007
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Wada, J. A. (1975). Cerebral Hemispheric Asymmetry in Humans: Cortical Speech Zones in 100 Adult and 100 Infant Brains. Archives of Neurology. https://doi.org/10.1001/archneur.1975.00490460055007

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.