ANP 1106 Chapter Notes - Chapter 14: Tactile Corpuscle, Golgi Tendon Organ, Intrafusal Muscle Fiber

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1106
• Professor: Jackie Carnegie

Document Summary

Dr. jackie carnegie & dr. w staines: pns and reflex activity: somatosensory. 03. 14. 2017-03. 16. 2017: 486 494, 596-514; p. 435-436, 438, 468-469, 472-474, 516-521. Peripheral nervous system (pns): all neural structures outside the brain and spinal cord; includes sensory receptors, peripheral nerves, associated ganglia, autonomic nervous system, and motor endings; provides links to and from external environ. Cns function critically depends on pns input; pns receives input from peripheral sensory receptors. Structures specialized to respond to stimuli; activation of sensory receptors results in a graded depolarization that trigger ap impulse along the nerve axon to the cns. Reflex activity takes place in the spinal cord; sensation and perception occur in the cerebral cortex: i. e tendon stretch reflex, withdrawal reflex. Receptor class by stimulus type name indicates stimulus that activates the receptor. Mechanoreceptors: respond to mechanical force; i. e touch, pressure, vibration, stretch, and itch.