Abstract
AbstractUntil the last decade or so, relatively little was known of cranial asymmetries in nonhuman primates. Data are slowly, but surely, accumulating for such features as transverse sinus flow, sylvian point angle differences, external brain morphology, etc. Cranial asymmetries are being analyzed and related to such diverse problems as “handedness” and phylogenetic systematics. It has been known for over 200 years that cranial asymmetry exists in some of the cerebral blood flow patterns in man, particularly the internal jugular pathway. Although earlier anatomists assumed this was only characteristic of “higher primates” (meaning man and the great apes), little quantitative data have been available to either support or deny this belief. There is a particular dearth of information for New World primates. The aim of this study is to contribute to the growing literature on cerebral asymmetries by partially filling in this gap in our knowledge of New World primate biology.
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