Nothing happens until the excitatory stimulus exceeds a certain " threshold " value.
兴奋性刺激超过某一临界值以前毫无反应。
The cool pain and heat pain threshold may degrade or not differentiate when the increase of the rate of stimulus is not enough.
在刺激温度变化率增加不够大时，冷痛觉、热痛觉阈值可能随温度变化率增加而降低或无差别。
Objective: To understand the effect of different rates of stimulus on thermal threshold.
目的：在定量感觉检查中，探讨不同刺激温度变化率对温度觉阈值的影响。
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