筋収縮および弛緩における運動単位のPhasic及びStaticな特性について

概要

論文の詳細を見る
It had been proposed by Kurata that the relative threshold value F_<th> of single motor units depends on gradient G (kg/sec) in the tension increase of muscle in such a manner as F_<th>(≡T_1・G)=ρ・G^1 Here T_1 is the time interval from the onset of E.M.G. to the moment of recruitment of a motor unit and ρ is the proportional constant. The motor unit with a positive/negative value of λ is characterized to be static/phasic. In order to confirm the above relation and to see whether or not the relation is also valid in the relaxation period, single motor units of M. VASTUS MEDIALIS were studied by the same method as that of Kurata. The present findings are : 1) At the contraction period the aove relation was confirmed. 2) At the relaxation period the above relation also holds, provided that F_<th> and G are replaced by the tension at the moment of silence and the absolute value of G, respectively. The motor unit with a positive/negative value of λ is characterized to be phasic/static. 3) The value of F_<th> and λ at the relaxation period are not the same as those at the contraction period.
日本体力医学会の論文
1976-09-01