The motion aftereffect (MAE) refers to the apparent motion of a stationary stimulus following adaptation to a continuously moving stimulus. There is a growing consensus that the fast adapting (FA) rather than the slowly adapting (SA) afferent units mediate the tactile version of the MAE. The present study investigated which FA units underlie the tactile MAE by measuring its prevalence, duration, and vividness on different skin areas that vary in their composition of FA units. Specifically, the right cheek, volar surface of the forearm, and volar surface of the hand were adapted using a ridged cylindrical drum, which rotated at 60 rpm for 120 s. Although there was no difference in duration or vividness between the skin surfaces tested, the tactile MAE was reported twice as often on the hand compared to the cheek and forearm, which did not differ significantly from one another. This suggests that the FA I units in the glabrous skin and the hair follicle and/or the FA I and field units in the hairy skin contribute to the tactile MAE.

译文

运动后效 (MAE) 是指适应连续运动的刺激后的固定刺激的表观运动。越来越多的共识是,快速适应 (FA) 而不是缓慢适应 (SA) 传入单元介导了MAE的触觉版本。本研究通过测量触觉MAE的患病率,持续时间和在不同皮肤区域的生动性 (FA单位的组成不同),调查了哪些FA单位是触觉MAE的基础。具体地说,右脸颊、前臂的掌侧表面和手的掌侧表面使用脊状圆柱形鼓进行调整,该鼓以60 rpm旋转120 s。尽管所测试的皮肤表面之间的持续时间或生动性没有差异,但与脸颊和前臂相比,手部的触觉MAE被报告为两倍,彼此之间没有显着差异。这表明无毛皮肤和毛囊中的FA I单位和/或多毛皮肤中的FA I和field单位有助于触觉MAE。

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