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Nature. 2001 Nov 29;414(6863):505.

Asymmetric Broca's area in great apes.

Author information

1
Division of Psychobiology and Living Links Center, Yerkes Regional Primate Research Center, Emory University, Atlanta, Georgia 30322, USA. lrcbh@rmy.emory.edu

Abstract

Brodmann's area 44 delineates part of Broca's area within the inferior frontal gyrus of the human brain and is a critical region for speech production, being larger in the left hemisphere than in the right - an asymmetry that has been correlated with language dominance. Here we show that there is a similar asymmetry in this area, also with left-hemisphere dominance, in three great ape species (Pan troglodytes, Pan paniscus and Gorilla gorilla). Our findings suggest that the neuroanatomical substrates for left-hemisphere dominance in speech production were evident at least five million years ago and are not unique to hominid evolution.

PMID:
11734839
PMCID:
PMC2043144
DOI:
10.1038/35107134
[Indexed for MEDLINE]
Free PMC Article

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