Kinesiology 1080A/B Lecture Notes - Lecture 16: Retina, Dont, Visual Cortex

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 1080A/B
• Professor: Matthew Heath

Document Summary

Innervation the distribution of nerves to a part of the body. Innervation ratio the number of muscle fiber innervation by a single alpha motorneurons; can vary from a few to over a thousand: extrafusal fibers power producing muscle fibers external with respect to muscle spindles (movement production) Motor neurons and motor unit: alpha motor neuron = a neuron innervating power producing, extrafusal muscle fiber, motor unit alpha motor neuron and all the muscles it innervates; a unit of force production in skeletal muscles. Is a single motor neuron (gamma or alpha) that innervates extrafusal or intrafusal muscles: motor neuron pool as containing many alpha or gamma and many muscle fibers, all the muscles they can innervate. Fusi-motor neurons: gamma motor neuron = small neurons innervating intrafusal fibers and changing sensitivity of muscle response to dynamic stretch. It is both dynamic and static stretch: being able to know where are feet are is muscle fibers.