Amount of asymmetry in grasp reflex depends on the grasp reflex of the left hand in human neonates.
Grasp-reflex strengths from right and left hands were measured in 33 human neonates. There was no significant correlation between right minus left grasp-reflex strength and grasp-reflex strength from the right hand. The grasp-reflex strength of the left hand was negatively linearly correlated with the right minus left grasp-reflex strength. It was suggested that the right brain may be the main determinant for the motor asymmetry in hands.
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Department of Physiology, Medical Faculty, Ataturk University, Erzurum, Turkey.
D001921:Brain / Q000502:physiology; D004292:Dominance, Cerebral / Q000502:physiology; D005260:Female; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D007231:Infant, Newborn / Q000502:physiology*; D008297:Male; D009048:Motor Skills / Q000502:physiology*; D009119:Muscle Contraction / Q000502:physiology; D012016:Reference Values; D012018:Reflex / Q000502:physiology*