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Related to motor fiber: Gamma motor neuron
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The EMG examination specifically provides information regarding motor fiber denervation as confirmed by the presence of increased insertional activity and abnormal resting potentials (eg, positive sharp wave, fibrillations potentials).
23,24] It has been shown that motor fibers innervating the thenar muscles are relatively protected, compared to motor branches of the lumbrical muscles.
Somatotopic organization of motor fibers in the corona radiata in monoparetic patients with small subcortical infarct.