Manual asymmetries in goal-directed movement: examination of the motor output hypothesis.
Two experiments are reported which examined the viability of motor output hypothesis as an explanation for manual asymmetries in goal-directed movement. Experiment 1 isolated the variability due to force generation by directly assessing precision of force production during an isometric wrist flexion task. Experiment 2 examined the additional role of externally based and internally created timing patterns on the performance of a repetitive force production task. Virtually no effects involving hand were apparent in either experiment. These findings provide no support for a hypothesis based solely on motor output to adequately account for hand differences in the performance of rapid, goal-directed movement.
Binsted
G
G
Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada. binsteg@mcmail.cis.mcmaster.ca
Cullen
J
J
Elliott
D
D
D000328:Adult; D006040:Goals; D006225:Hand / Q000502:physiology*; D018737:Hand Strength / Q000502:physiology; D006801:Humans; D008297:Male; D009068:Movement / Q000502:physiology*