Kinesiology 2236A/B Lecture Notes - Lecture 5: Physical Therapy, Afferent Nerve Fiber, Edema

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

Document Summary

Kinesiology 2236b lecture 5: the role of hot and cold. Pain receptors called nociceptors are sensitive to: Afferent nerve fibers carry information from nociceptors towards the spinal cord. Located in skin and deep tissue (muscle/ligament) Without any stimulation, both large a beta (large) and. C small nerve fibers are quiet and the sg and inhibitory interneuron block the signal in the t cell that connects to the brain. The gate is closed and therefore no pain. Inhibitory signals block t cell so you don"t feel pain. With pain stimulation, c fibers become active. They block the inhibitory sg and activate the. Because activity of the inhibitory interneuron is blocked, it cannot block the output of the t cell that connects with the brain. The gate is open , therefore pain occurs. C pain sends signal to sg, t cell gets info from slow. C and send it to the brain inhibit the inhibitory interneuron and pain is felt.