Kinesiology 1080A/B Lecture Notes - Parietal Lobe, Brainstem, Alpha Motor Neuron

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

Document Summary

Neurons on m1 project to spinal cord can also project to propriospinal neuron or interneuron. Shares information converging point and shares among alpha motor neuron relays information from higher motor centers to multiple alpha neurons. M1 is by far the vast contributor. Motor neuron activity organized by cerebral cortex. Corticobulbar fibres extend from the motor cortex to the bulb" (ie, the brain stem) Bulbar tract extends to bulb and controls below. Control facial musculature and muscles of mastication. Upper neuron that arises in cortex and extend to brain stem. Facial nucleus is divided into rostral (innervates forehead) and caudal (innervates mouth parts) What is the impact of upper vs. lower motor neuron lesion: rostral component only does upper facial muscle, contralateral caudal innervates lower facial muscles. Originates from m1 from neurons within. Descend uncrossed in ventral columns of the spinal cord forming the ventral corticospinal tract uncrossed pathway".