ERIC Number: EJ931476
Record Type: Journal
Publication Date: 2011-May
Abstractor: As Provided
Reference Count: N/A
Brain Structure in Young and Old East Asians and Westerners: Comparisons of Structural Volume and Cortical Thickness
Chee, Michael Wei Liang; Zheng, Hui; Goh, Joshua Oon Soo; Park, Denise; Sutton, Bradley P.
Journal of Cognitive Neuroscience, v23 n5 p1065-1079 May 2011
There is an emergent literature suggesting that East Asians and Westerners differ in cognitive processes because of cultural biases to process information holistically (East Asians) or analytically (Westerners). To evaluate the possibility that such differences are accompanied by differences in brain structure, we conducted a large comparative study on cognitively matched young and old adults from two cultural/ethnic groups--Chinese Singaporeans and non-Asian Americans--that involved a total of 140 persons. Young predominantly White American adults were found to have higher cortical thickness in frontal, parietal, and medial-temporal polymodal association areas in both hemispheres. These findings were replicated using voxel-based morphometry applied to the same data set. Differences in cortical thickness observed between young volunteers were not significant in older subjects as a whole. However, group differences were evident when high-performing old were compared. Although the observed differences in gray matter may be rooted in strategic differences in cognition arising from ethnic/cultural differences, alternative explanations involving genetic heritage and environmental factors are also considered.
Descriptors: Cultural Differences, Brain, Comparative Analysis, Young Adults, Older Adults, Asians, North Americans, Whites, Foreign Countries
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Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Authoring Institution: N/A
Identifiers - Location: Singapore; United States