KP222 Lecture 10: KP222 Lecture 10
31 Jan 2019
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Each dermatome is served by a spinal nerve. Gray matter: functional halves: dorsal: sensory functions, ventral: motor functions. White matter forms tracts: ascending (to sc or brain, descending (from sc or brain) Automatic patterned response to a stimulus: stretch re ex, withdrawal and crossed -extensor re exes. Re ex arc: sensory receptor a erent neuron integration center e erent neuron e erent organ. Tap on the tendon causes change in muscle bre length in quads. Spindles detect change and send a erent information to the sc. The a erent information also inhibits the hamstrings. Allow the movement to occur, otherwise hamstring would resists the quads. Perception: conscious interpretation of the world based on sensory systems memory, and other neural processes. Information is sent from the periphery to the cns: external environment. Somatosensory system: somatic: sensations of the skin, proprioception: perfection of limb and body positions, special sense:
