Section Handout #2

Section Handout #2 - Hanna Shim OH: 4-5PM @ Roma &...

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Hanna Shim OH: 4-5PM @ Roma & EXTRA OH: 9-10AM @ S&E Library Room (EAST side) in Geisel e-mail: hannashim@gmail.com BIPN 100 Hand-Out #2 EXTENSOR FLEXOR Centers of bones move farther apart when an extensor muscle contracts Centers of bones move closer together when a flexor muscle contracts Opens joint Closes joint i.e. quadriceps, triceps i.e. hamstring, biceps Stretch Reflex Spinal reflex (brain is not required for reflex to occur) Monosynaptic Stretch patellar tendon stretch muscle activation of sensory neurons action potential sent to spinal cord synapse motor neurons activated (HOMONYMOUS MUSCLE: the same muscle that was stretched later becomes contracted; in this case the tendon stretch caused the quadriceps to stretch, thus the quadriceps later contract) Withdrawal Reflex/ Flexion/ Nociceptive (Pain) Reflex Spinal reflex At least disynaptic Ipsilateral Flexor is always activated & Ipsilateral Extensor is always inhibited WARNING: THE BRAIN PARTS LISTED DO NOT INCLUDE ALL THOSE YOU ARE RESPONSIBLE TO KNOW; ALSO, THERE MAY BE FUNCTIONS FOR BRAIN PARTS THAT ARE NOT LISTED IN THIS TABLE BRAIN PART FUNCTION Cerebral cortex (surface cells of brain)
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Section Handout #2 - Hanna Shim OH: 4-5PM @ Roma &...

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