Donald M W, Hovmand J
Percept Mot Skills. 1981 Dec;53(3):799-809. doi: 10.2466/pms.1981.53.3.799.
The primary aim of this study was to determine whether feed-back-assisted skin temperature regulation can be demonstrated when skeletomuscular mediation, in the form of altered local EMG activity, is prevented. A second aim was to determine whether the success of such regulation is affected by the basal temperature of the skin. 30 adult subjects were asked to increase or decrease the temperature of the index finger of the dominant hand, while the local musculature was kept in a relaxed state using EMG feedback. The local ambient air temperature surrounding the limb was set at either 10 degrees C, 24 degrees C, or 38 degrees C, resulting in large differences in basal skin temperature. Subjects were successful at both increasing and decreasing skin temperature while maintaining an integrated EMG output below 75 muV in the target limb. The magnitude of change, much smaller than those commonly reported in this field, did not vary across the air temperature levels, indicating that skin temperature autoregulation under these conditions does not conform to the law of initial value. It was concluded that autoregulation of skin temperature can be demonstrated in a virtually flaccid limb, and that the amount of temperature change achieved is not a function of basal skin temperature.
本研究的主要目的是确定，当以局部肌电图活动改变的形式存在的骨骼肌调节作用被阻止时，是否能够证明反馈辅助的皮肤温度调节作用。第二个目的是确定这种调节的成功是否受皮肤基础温度的影响。30名成年受试者被要求升高或降低优势手食指的温度，同时使用肌电图反馈使局部肌肉组织保持放松状态。肢体周围的局部环境空气温度设定为10摄氏度、24摄氏度或38摄氏度，从而导致基础皮肤温度存在很大差异。受试者在升高和降低皮肤温度方面均取得成功，同时目标肢体的肌电图综合输出保持在75微伏以下。变化幅度远小于该领域通常报道的幅度，且在不同气温水平下并无差异，这表明在这些条件下皮肤温度的自动调节并不符合初始值定律。研究得出结论，在几乎松弛的肢体中可以证明皮肤温度的自动调节作用，并且实现的温度变化量并非基础皮肤温度的函数。
