Sugenoya J, Iwase S, Mano T, Ogawa T
Department of Physiology, Aichi Medical University, Japan.
Eur J Appl Physiol Occup Physiol. 1990;61(3-4):302-8. doi: 10.1007/BF00357617.
In a warm environment at ambient temperatures between 25 degrees and 38 degrees C (relative humidity 50%-60%) the relationship between sympathetic activity in cutaneous nerves (SSA) and pulses of sweat expulsion was investigated in five young male subjects. The SSA was recorded from the peroneal nerve using a micro-electrode. Sweat expulsion was identified on the sweat rate records obtained from skin areas on the dorsal side of the foot, for spontaneous sweating and drug-induced sweating, using capacitance hygrometry. Sweat expulsion was always preceded by bursts of SSA with latencies of 2.4-3.0 s. This temporal relationship between bursts of SSA and sweat expulsion was noted not only in various degrees of thermal sweating but also in the sweating evoked by arousal stimuli, or by painful electric stimulation. The amplitude of the sudomotor burst was linearly related to the maximal rate of increase of the corresponding sweat expulsion, the amplitude of the expulsion and the integrated amount of sweat produced for the duration of the expulsion. The results provide direct evidence that sweat expulsion reflects directly centrally-derived sudomotor activity.
在25摄氏度至38摄氏度的温暖环境中（相对湿度50%-60%），对五名年轻男性受试者进行了研究，以探究皮肤神经交感神经活动（SSA）与排汗脉冲之间的关系。使用微电极从腓神经记录SSA。使用电容湿度测定法，从足背皮肤区域获得的出汗率记录中识别出排汗情况，包括自发出汗和药物诱导出汗。排汗总是先于SSA爆发，潜伏期为2.4-3.0秒。SSA爆发与排汗之间的这种时间关系不仅在不同程度的温热性出汗中可以观察到，在由唤醒刺激或疼痛电刺激引起的出汗中也能观察到。发汗运动爆发的幅度与相应排汗的最大增加速率、排汗幅度以及排汗持续时间内产生的汗液总量呈线性相关。这些结果提供了直接证据，表明排汗直接反映了源自中枢的发汗运动活动。
