کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2034767 1543057 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Acting unilaterally: Why do animals with strongly lateralized brains behave differently than those with weakly lateralized brains?
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی بیوشیمی، ژنتیک و زیست شناسی مولکولی (عمومی)
پیش نمایش صفحه اول مقاله
Acting unilaterally: Why do animals with strongly lateralized brains behave differently than those with weakly lateralized brains?
چکیده انگلیسی

Cerebral lateralization was once thought to be unique to humans, but is now known to be widespread among the vertebrates. Lateralization appears to confer cognitive advantages upon those that possess it. Despite the taxonomic ubiquity and described advantages of lateralization, substantial individual variation exists in all species. Individual variation in cerebral lateralization may be tied to individual variation in behaviour and the selective forces that act to maintain variation in behaviour may also act to maintain variation in lateralization. The mechanisms linking individual variation in the strength of cerebral lateralization to individual variation in behaviour remain obscure. We propose here a general hypothesis which may help to explain this link. We suggest that individuals with strong and weak lateralizations behave differently because of differences in the ability of one hemisphere to inhibit the functions of the other in each type of brain organization. We also suggest a specific mechanism involving the asymmetric epithalamic nucleus, the habenula. We conclude by discussing some predictions and potential tests of our hypothesis.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioscience Hypotheses - Volume 2, Issue 6, 2009, Pages 383–387
نویسندگان
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