International Journal of Primatology

, Volume 18, Issue 1, pp 105-114

First online:

Locomotor Adaptation and Leading Limb Asymmetries in Neonatal Chimpanzees (Pan troglodytes)

  • William D. HopkinsAffiliated withDepartment of Psychology, School of Education and Human Sciences, Berry College
  • , Kim A. BardAffiliated withYerkes Regional Primate Research Center, Emory University
  • , Kristine M. GrinerAffiliated withYerkes Regional Primate Research Center, Emory University

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We assessed laterality for leading limb in crawling and leading limb in stepping in 13 chimpanzees (Pan troglodytes) during the first 3 months of life. Overall, there is a significant populational right-side bias for crawling but not for stepping. There is a significant negative correlation between laterality in stepping and crawling. The females are more right-sided in lateral bias than the males across both measures. These data suggest that asymmetries in postural organization are present early in life and are specific to the inherent locomotor behavior of a given species.

laterality infants locomotion chimpanzees reflexes