Physiology 2130 Study Guide - Midterm Guide: Golgi Tendon Organ, Intrafusal Muscle Fiber, Gamma Motor Neuron

• School: Western University
• Department: Physiology
• Course: Physiology 2130
• Professor: Anita Woods

Document Summary

Before movement requires info: whi(cid:272)h (cid:373)us(cid:272)le to use: lear(cid:374)ed (cid:271)eh"r, length of muscle: so do(cid:374)"t over e(cid:454)te(cid:374)d. Muscle spindle: sense and sends info along 1a afferent: tension: so does(cid:374)"t rip. Golgi tendon organs: sense and sends info along 1b afferent. Motor unit: group of skeletal muscle and somatic motor neuron that controls them. Through proprioceptors (monitor position of limbs)-muscle spindles and gto. Muscle spindle: provide info about muscle length and change in muscle length. Muscle spindles are tonically active (active even at rest) Alpha motor neuron: cell bodies found in ventral horn throughout spinal cord and innervate skeletal muscles. Gamma motor neuron: from cns innervate intrafusal fibers. 1a afferent neuron: sensory neuron that sends continuous info to cns from muscle spindle. 1b afferent neuron: sensory neuron that is part of gto, sends info to cns about muscle tension. Golgi tendon organ(gto): provide info about muscle stretch. As muscle stretch: increase tension cause pulling on tendon.