A STUDY ON DELAY AND QUICKNESS OF SENSORY-MOTOR INTEGRATION PROCESS / 体力科学

ABSTRACT

Nishihira and Araki grasped the living body as sensory-motor system, and thought negative potential appearing 25 msec after stimulus of S. S. C. P. as potential arriving at the first sensory area and speculated potential appearing 50-56 msec in advance of muscle discharges as being integrated of motor cortex neurones in the present experiment.<BR>Therefore, the purpose of the present experiment is to investigate the hypothesis that delay and quickness of reaction movement execution depends on delay and quickness of transaction process between sensory and motor area and, also, to identify the distribution over the scalp of motor potential.<BR>The present experiment gave the following results.<BR>1. As for the distribution over the scalp of motor potential, the amplitude of motor potential at Cz showed maximum in case of the left hand reaction movement to right median nerve stimulus. however, comparing the amplitude of motor potenital at C4 with at C3, the amplitude of motor potential at C4 was higher than at C3.<BR>Comparing the amplitude of motor potential at C3 with at C4 except for at Cz, the amplitude of motor potential at C3 was higher than at C4 in case of the right hand reaction movement to right median nerve stimulus.<BR>2. Investigating correlation between reaction time and sensory-motor integration time at C3, C2, C4, there was a higher correlation.<BR>3. Correlation between reaction time and the amplitude of CNV at C2 showed inverse proportion. In addition to, correlation between reaction time and appearance latency of CNV was obscure.