Effect of muscular system functional state on human arm fingers bending

Abstract

Basic features of the motion activity dynamics of II–V fingers of human superior limbs are analyzed. The frequency-force dependence of arm fingers bending at change of the functional state of their muscular system is quantitatively estimated. Qualitative similarity in dynamics of changes of mechanography features under the influence of external (work of contralateral muscles) and internal (fatigue, blood supply disturbance) factors is determined. Mean power of finger muscular system is maximal when n. medianus and n. ulnaris are stimulated with force not less then two rheobases and stimuli width are not less then 4 ms with finger applied weight of 20–40 g.