@article{oai:nagoya.repo.nii.ac.jp:02005880,
 author = {脇田, 裕久 and WAKITA, Hirohisa and 八木, 規夫 and YAGI, Norio and 矢部, 京之助 and YABE, Kyonosuke},
 issue = {1},
 journal = {総合保健体育科学, Nagoya Journal of Health, Physical Fitness & Sports},
 month = {Mar},
 note = {It has been observed that the premotion silent period (p.s.p.) appears just before a rapid voluntary movement. The present study was designed to investigate the effect of physical characteristics on the appearance of p.s.p. Subjects were healthy 62 boys and 60 girls aged 4-5 years. Body height, weight, skinfold thickness, isometric leg strength and reaction movement were measured on each subject. On the measurement of reaction movement, they were asked to maintain the standing posture with knee joint flexed at about 50 degrees on the force plate and to extend their knee joint responding to a flashing lamp as quickly as possible. The EMG activities of M. vastus lateralis, M. vastus medialis and M. biceps femoris were recorded using bipolar surface electrodes. Vertical force curve was recorded when the subjects extended the knee joint on a force plate. The following results were obtained from this experiment. 1) The rate of appearance in p.s.p. increased with age. 2) The latency of p.s.p. shortened with age. 3) The correlation between the rate of appearance in p.s.p. and body height was positively significant. 4) Positive significant correlation was found between the latency of p.s.p. and the body fat mass, and the correlation between the latency of p.s.p. and the leg strength was negatively significant. 5) The correlation between the movement time and body fat mass was positively significant. 6) Positive significant correlation was found between the peak value of force curve and the leg strength. It is suggested from these results that increasing the body fat mass delayed the latency of p.s.p. and movement time, and that increasing the leg strength rised the peak value of force curve.},
 pages = {47--55},
 title = {幼児期における動作前抑制現象について},
 volume = {12},
 year = {1989}
}