@article{oai:nagoya.repo.nii.ac.jp:02005881, author = {石田, 浩司 and ISIDA, Koji and 宮村, 実晴 and MIYAMURA, Miharu 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 = {To elusidate the effect of acute hypoxia on neuro-muscular functions, electrically evoked twitch contractions and monosynaptic reflexes were induced for 10 male volunteers during hypoxia (15% 02 + 85% N2) for 15 min followed by normoxia for 15 min. The hypoxic condition was compared with the control (normoxic) condition obtained by the same procedure. Maximal twitch force (Pt) decreased gradually and significantly in both control and hypoxic conditions, but there was no significant difference between them. Maximal rate of force develpment (max dF/dt) and relaxtion (relax dF/dt) did not show any change during inhaling hypoxia. During recovery, max dF/dt tended to decrease (2.8%) and relax dF/dt tended to increase (3.1%) as compared with the control condition. Electromechanical delay time (EMD) showed a gradual but nonsignificant decrease. On the other hand, a large decrease was found in H wave amplitude induced by constant stimulation intensity, but there was no significant change because of wide difference within each subject. These results suggest that a short term hypoxia in the present study affects more to the recruitment pattern of H-reflex than to peripheral muscle mechanical properties.}, pages = {57--64}, title = {短時間の低酸素吸入が誘発張力およびH反射に及ぼす影響}, volume = {12}, year = {1989} }