According to the conduction velocity of afferent fibers and stimulusthreshold, evoked EPSCs that are mediated by A-like or C-like fibers were distinguished.
以传入纤维的传导速度与刺激阈值为指标，可以区分A样纤维与C样纤维兴奋性突触后电流。
2
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。
3
The cool pain and heat pain threshold may degrade or not differentiate when the increase of the rate of stimulus is not enough.