Title |
Does body posture influence hand preference in an ancestral primate model?
|
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Published in |
BMC Ecology and Evolution, February 2011
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DOI | 10.1186/1471-2148-11-52 |
Pubmed ID | |
Authors |
Marina Scheumann, Marine Joly-Radko, Lisette Leliveld, Elke Zimmermann |
Abstract |
The origin of human handedness and its evolution in primates is presently under debate. Current hypotheses suggest that body posture (postural origin hypothesis and bipedalism hypothesis) have an important impact on the evolution of handedness in primates. To gain insight into the origin of manual lateralization in primates, we studied gray mouse lemurs, suggested to represent the most ancestral primate condition. First, we investigated hand preference in a simple food grasping task to explore the importance of hand usage in a natural foraging situation. Second, we explored the influence of body posture by applying a forced food grasping task with varying postural demands (sit, biped, cling, triped). |
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