摘要: The spontaneous but intermittent activity of hair follicles, which “switch on” at the beginning each anagen period and off” its end, could be explained were an inhibitory substance to accumulate during disappear resting phase cycle (Chase, 1954; Chase Eaton, 1959; Bullough, 1965). However, equally well accounted for by accumulation a stimulant telogen dispersal active (Argyris, 1962).