Appendix C- Spinal Cord Physiology.ppt

Appendix C- Spinal Cord Physiology.ppt - The Spinal Cord 1...

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The Spinal Cord 1
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Reflexes and Reflex Arcs Quick, involuntary, stereotyped reactions of glands or muscle to sensory stimulation automatic responses to sensory input that occur without our intent or often even our awareness Functions by means of a somatic reflex arc stimulation of somatic receptors afferent fibers carry signal to dorsal horn of spinal cord one or more interneurons integrate the information efferent fibers carry impulses to skeletal muscles skeletal muscles respond Somatic spinal reflexes include the stretch reflex, tendon reflex, flexor (withdrawal) reflex , & crossed extensor reflex 2
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Stretch Reflex (Patellar Reflex) Operates as a feedback mechanism to control muscle length by causing muscle contraction. Prevents injury from over stretching because muscle contracts when it is stretched Monosynaptic, ipsilateral (same side) reflex arc Events of stretch reflex muscle spindle signals stretch of muscle
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This note was uploaded on 06/11/2009 for the course BIOL 10382 taught by Professor Brock during the Spring '09 term at Delgado CC.

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Appendix C- Spinal Cord Physiology.ppt - The Spinal Cord 1...

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