Upper Motor Neuron Vs. Lower Motor Neuron Paralysis

Upper Motor Neuron Vs. Lower Motor Neuron Paralysis UPPER MOTOR NEURON Vs. LOWER MOTOR NEURON PARALYSIS UPPER MOTOR NEURON (UMN): Descending neurons from cerebral cortex, cerebellum & brainstem. Terminate directly on neurons innervating muscle. I.e., on α-motor neurons. UMN TRACTS: Corticospinal (Pyramidal) Extrapyramidal tracts. Cell axons of these pathways. E.g. Giant pyramidal cells. Betz cells of primary motor cortex. UMN Lesion […]