MOTOR 3-motor cortex, basal ganglia, cerebellum

MOTOR 3-motor cortex, basal ganglia, cerebellum - MOTOR...

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Click to edit Master subtitle style MOTOR CORTEX, BASAL GANGLIA, CEREBELLUM: programming and control of voluntary movement reading B&L, Chapter 9
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Language areas Auditor y- languag Motor- speech Eye movement areas Motor cortex: critical for the programming and control of voluntary movement: Several cortical motor areas 4- movement of limbs and body 2- movements of eyes 1- speech
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Areas for movement of limbs and body: area 4, primary motor cortex dorsal and ventral premotor cortex (area 6) supplementary motor area (area 6) All areas are interconnected All contribute axons to the corticospinal or pyramidal tract CLINICAL TERMINOLOGY : upper motoneurons - cells in motor cortical areas that send their axons (“project”) down the spinal cord in corticospinal tracts lower motoneuron - cells in ventral horn of spinal cord that send axons out to muscles
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Medial wall of hemisphere
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AREA 4- PRIMARY MOTOR CORTEX: Programming and control of voluntary movement Especially important in control of the hands and fingers; characterized by large cells in deeper cortex called Betz cells Stain that stains cell body, dendrites and axon (cell body about 30 microns- µm- in diameter; 1000 microns/mm. area 4
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Axons descend in the corticospinal or pyramidal tracts dorsal, ventral dorsal ventral medulla dcn
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2 patterns of termination of corticospinal axons in the spinal cord, special relationship of motor cortex and fine finger movements
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cortex? electrical stimulation of motor cortex: classic experiments brief contraction of one or a few muscles on the contralateral side of the body somatotopic organization (orderly map of the contralateral body ) Fritsch and Hitzig-dogs Worked on patients with epilepsy trying to find “seizure focus” in order to remove it surgically but limit surgical removal to spare language etc. Patients awake and able to report experiences
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This note was uploaded on 02/22/2011 for the course PGY 451 taught by Professor Baizer during the Spring '09 term at SUNY Buffalo.

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MOTOR 3-motor cortex, basal ganglia, cerebellum - MOTOR...

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