Kinesiology 1080A/B Lecture Notes - Retinol, Ganglion, Corticospinal Tract

• School: Western University
• Department: Kinesiology
• Course: Kinesiology 1080A/B
• Professor: Matthew Heath

Document Summary

Composed of a million fibers and allows for descending motor control. Information from m1, sma, pma and parietal cortex enter the spinal cord via the pyramidal tract. Interphase either directly or indirectly with alpha motor neurons. Comprised of the corticobulbar tract and corticospinal tract. Corticobulbar fibers extend from the motor cortex (m1) to the bulb (the brain. Motor neuron activity organized by cerebral cortex. Control facial musculature and muscles of stem) mastication. Contains upper and lower motor neurons (neuron on m1 and alpha motor neuron) Terminates at the brain stem (monosynaptic connection) Facial nucleus is divided into rostral (innervates forehead) and caudal (innervates mouth) parts. Tumor on left upper motor neurons leads to asymmetrical innervation of lower facial musculature (paralysis on contralesional side) Lower motor neuronal injury (injury to alpha motor neuron) leads to complete paralysis on one full side of the face. Originates from m1 (and sma and pma)