BPK 205 Chapter Notes -Postcentral Gyrus, Withdrawal Reflex, Anterior Grey Column

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Practice questions on chapter 13 [there is some repetition of questions: describe the structure of a gto. Draw and describe reflex connections of 1b afferents. [~ 1 page of total writing + figures; make sure of the connections in the spinal cord--what is in the intermediate zone and what is in the ventral horn] Gto is located at junction between extrafusal fibers, and muscle tendon. One pathway goes up via the dorsal column to the medulla ipsilaterally and synapses; then travels contralaterally and synapses in the ventro- Thalamus to areas 3, 2, 1 of the primary somatosensory cortex: the second pathway travels into the gray matter of the spinal cord and divides in the intermediate area. At least one branch will excite an antagonist muscle, while others will inhibit agonist muscles. Pretty much the same: compare/contrast the ipsilateral spinal reflex connections from 1a, 1b and pain afferents. [~ 1 page of writing + three detailed figures. ]

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