Kinesiology 2236A/B Lecture Notes - Lecture 5: Group C Nerve Fiber, Afferent Nerve Fiber, Small-C

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 2236A/B
• Professor: Dave Humphreys

Document Summary

Pain: any unpleasant sensory and emotional experience associated with actual potential tissue damage, or described in terms of such damage. Pain transmission: pain receptors called nocioceptors are sensitive to, mechanical, thermal (hot, cold, chemical, afferent nerve fibers carry information from nociceptors towards the spinal cold. A delta myelinated fast pain (notifies you almost instantly like protection) temperature slow pain (these fire for the next 3- Gate control theory of pain: large a-beta fibers are not pain fiber. Gate control step by step: without any stimulation, both large a beta and small c nerve fibers are quiet and the sg and inhibitory interneuron block the signal in the t-cell that connects to the brain. The (cid:862)gate is (cid:272)losed(cid:863) a(cid:374)d therefore (cid:374)o pai(cid:374: with pain stimulation, c fibers become active. They block the inhibitory sg and activate the t-cells. Because activity of the inhibitory interneuron is blocked, it cannot block the output of the t-cell that connects with the brai(cid:374).