思春期における対側性連合運動（CAMs）に関する発達的検討

概要

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A sample of 293 healthy children of 8-12 years old was studied in this research. Degree of contralateral associated movements（CAMs）during diadochokinesis（pronation-supination of upper limb）was observed and assessed. Among right handedness children, there was a decrease of CAMs with age, with a remarkable decrease at 11 years（females）and at 12 years（males）respectively. And females showed fewer CAMs than males in almost all age groups. These sex differences were consistent with a fact that the adolescent spurt begins one or two years earlier in females than in males. Also in non-right handedness children, there were similar results as obtained in the right handedness. These results were discussed mainly on the basis of the callosal inhibition hypothesis（Nass,1985）.
2010-03-31