Freestanding Bipedal posture and coordinated bimanual manipulation significantly influence lateralized hand use in rhesus monkeys (Macaca mulatta) and chimpanzees (Pan troglodytes)

Jeremy Bailoo, Blair Quinius, Steven J. Schapiro, William D. Hopkins, Allyson J. Bennett

Research output: Contribution to journalArticlepeer-review

Abstract

nvestigations of behavioral lateralization in nonhuman primates yield important insights into brain-behavior relationships. In turn, they provide clues about both proximal and distal factors that shape the development and expression of association between motor asymmetries and underlying neural substrates. Nonhuman primates afford unique comparative opportunities to evaluate potential routes for the evolution of handedness, as well as to uncover relationships between behavioral lateralization and underlying neural, genetic, and physiological correlates. We examined hand preference in 22 rhesus monkeys and 79 chimpanzees using unimanual reaching tasks varying in postural stability and in a coordinated bimanual task. The majority of rhesus monkeys and chimpanzees showed significant lateral biases when reaching from a freestanding posture and when engaged in a coordinated bimanual task. Population-level directional bias was not evident for any task for rhesus monkeys and was observed onl
Original languageEnglish
Pages (from-to)171-182
JournalDefault journal
StatePublished - May 1 2019

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