Handedness: differential specializations for control of trajectory and position.
Handedness is often portrayed as a nonfunctional artifact of cerebral asymmetry. Our data, however, indicate that handedness reflects cerebral specialization for specific control processes. Each hemisphere/limb system is specialized for different but complementary functions: the dominant system for controlling limb trajectory dynamics, and the nondominant system for controlling limb position.
Sainburg
Robert L
RL
Programs in Kinesiology, Bioengineering, and Neuroscience, Penn State University, University Park, PA 16802, USA. rls45@psu.edu
D001696:Biomechanical Phenomena; D005121:Extremities / Q000502:physiology*; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D009048:Motor Skills / Q000502:physiology; D009068:Movement / Q000502:physiology*