Did throwing stones shape hominid brain evolution?

Bibliographic Collection: 
MOCA Reference, APE
Publication Type: Journal Article
Authors: William H. Calvin
Year of Publication: 1982
Journal: Ethology and Sociobiology
Volume: 3
Pagination: 115 - 124
Publication Language: eng
ISSN: 0162-3095
Keywords: Tool

Early hominid evolution may have involved an interaction between lateralization to left brain of rapid motor sequencing (e.g., right handedness) and its selection via one-handed throwing of stones at small prey. Since a more redundant sequencer should permit faster orchestration of muscles, faster (and hence longer range) throws could have selected for encephalization. Secondary uses of the enlarged sequencer may have included tool-sharpening and manual gestures. Because an oral-facial sequencing area just below motor strip forms the core of modern language cortex, there may have been a common origin of handedness and language in redundant sequencing circuits selected by throwing success.

DOI: http://dx.doi.org/10.1016/0162-3095(82)90010-3
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