Physiology 2130 Study Guide - Midterm Guide: Golgi Tendon Organ, Gamma Motor Neuron, Alpha Motor Neuron

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

Document Summary

Group of skeletal muscle fibres and the somatic motor neuron that controls them. Which muscle group it will move -> learned. Present length of muscles it will move -> muscle spindles, 1a afferent neuron. Present tension in the muscles it will move -> golgi tendon organ, 1b afferent neuron. Innervates extrafusal muscle fibers, resulting in muscle contraction. Goes from spinal cord to the muscle, efferent neuron. Sends info about velocity of muscle stretch to the cns via the 1a afferent neuron in non-contractile part. Surrounded by 2 contractile parts innervated by gamma motor neurons. Buried in parallel among extrafusal muscle fibers. Contractions in spindle stretch the non-contractile part and thus the. Sense how far muscles are stretched (type of proprioceptor) When they contract they cause the muscle spindle to stretch. Contractile muscles, the kind we"re all familiar with. Sensory neurons that send information from the muscle spindle to the.