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Unformatted text preview: Muscle proprioceptors: • muscle spindles sense muscle length • Golgi tendon organs sense muscle tension Control of muscle activity: • reflexive • command Sherwood, Klandorf & Yancey, Animal Physiology: From Genes to Organisms , Figure 8-24 3 Muscle spindle components: • spindle cells = modified, specialized muscle fibers (intrafusal) • gamma ( γ ) motor neuron = motor (efferent) nerve from spinal cord to muscle spindle cells • afferent sensory nerves = sensory (afferent) nerves from muscle spindle cells to spinal cord Skeletal muscle components: • muscle fibers (extrafusal) • alpha ( α ) motor neurons Sherwood, Klandorf & Yancey, Animal Physiology: From Genes to Organisms , Figure 8-25 Muscle Spindle Structure Sherwood, Klandorf & Yancey, Animal Physiology: From Genes to Organisms , Figure 8-26a...
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- Fall '09