Symmetries in human brain language pathways correlate with verbal recall

Catani  M; Allin  MPG; Husain  MPugliese  LMesulam  MMMurray  RMJones  DK

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Symmetries in human brain language pathways correlate with verbal recall

机译：Symmetries in human brain language pathways correlate with verbal recall

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摘要

Lateralization of language to the left hemisphere is considered a key aspect of human brain organization. We used diffusion tensor MRI to perform in vivo virtual dissection of language pathways to assess the relationship between brain asymmetry and cognitive performance in the normal population. Our findings suggest interhemispheric differences in direct connections between Broca's and Wernicke's territories, with extreme leftward lateralization in more than half of the subjects and bilateral symmetrical distribution in only 17.5 of the subjects. Importantly, individuals with more symmetric patterns of connections are better overall at remembering words using semantic association. Moreover, preliminary analysis suggests females are more likely to have a symmetrical pattern of connections. These findings suggest that the degree of lateralization of perisylvian pathways is heterogeneous in the normal population and, paradoxically, bilateral representation, not extreme lateralization, might ultimately be advantageous for specific cognitive functions.

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《Proceedings of the National Academy of Sciences of the United States of America》 |2007年第43期|17163-17168|共6页
作者
Catani M; Allin MPG; Husain MPugliese LMesulam MMMurray RMJones DK;
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作者单位

Kings Coll London, Inst Psychiat, Sect Brain Maturat, London SE5 8AF, England;

Kings Coll London, Inst Psychiat, Dept Psychol Med, London SE5 8AF, England;

Kings Coll London, Inst Psychiat, Ctr Neuroimaging Sci, London SE5 8AF, EnglandUniv Coll London, Inst Cognit Neurosci, London WC1N 3AR, EnglandNorthwestern Univ, Chicago, IL 60611 USACardiff Univ, Sch Psychol, Brain Res Imaging Ctr, Cardiff CF10 3AT, Wales;

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收录信息美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类自然科学总论;
关键词
arcuate fasciculus; brain asymmetry; diffusion tensor imaging; language lateralization; verbal memory; DIFFUSION-TENSOR MRI; AUTOMATED IMAGE REGISTRATION; SEX-DIFFERENCES; WHITE-MATTER; IN-VIVO; HEMISPHERIC ASYMMETRIES; FUNCTIONAL CONNECTIVITY; PLANUM TEMPORALE; CORTEX; LATERALIZATION;

Symmetries in human brain language pathways correlate with verbal recall

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