KINE 4505 Study Guide - Midterm Guide: Transcranial Magnetic Stimulation, Upper Motor Neuron, Motor Neuron
21 Oct 2016
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Document Summary
M1 has widely distributed organization increased resistance to disturbances from lesions dimension of information processing is greater than 3 simultaneous processing potential to generate numerous combination of movements must also be represented in brain. Icms intracortical microstimulation improvement over previous stimulate techniques insert electrode into cortical layer 5 and use electrical stimulation observe response in muscles cell body in m1, descends ipsilaterally, pyramidal decussation, descends contralaterally. 136 only part of the brain in which damage causes paralysis major inputs medial and lateral premotor areas primary somatosensory (s1), parietal area 5 sub-cortical areas (bg, cerebellum) major outputs: 137 single corticospinal efferent projects to multiple motor neuron pools horizontal interconnection. Umn signs: decreased muscle power (paresis), hyperreflexia, hypertonia babinski"s sign. 145 lower motor neurons directly innervate skeletal muscles aka a-motor neurons. Lmn signs: paresis, paralysis, atrophy, cramps hypotonia abnormally low resistance to stretch cerebellar disorders. 146 hypertonia abnormally strong resistance to stretch chronic umn lesions.
