GE CLST 73B Lecture Notes - Lecture 13: Substantia Nigra, Deep Cerebellar Nuclei, Basal Ganglia

• School: UCLA
• Department: General Education Clusters
• Course: GE CLST 73B
• Professor: Chandler, S.H.

Document Summary

Alpha motor neuron is a lower motor neuron. Positive sign- something that wasn"t there is now thre. If you have damage to the corticospinal system, you get those responses. Positive signs are things that occur that shouldn"t occur, this is because you have reflex pathways, that are under the control of cortical spinal influences. Spinal and brainstem reflexes can be hyper active ( in julia case) (abnormal hyper reflexia) Or the other extreme can happen (negative signs) Folia, a lot of folia, (the little enfoldings that increase the surface area) Pons has a big input into the cerebellum. Regulates movement and posture but indirectly, it can change movement, modify it but does not initiate it. If you have an injury it messes up the coordination and may cause a intention tremor. All the surface area can receive projections from and to certain parts of the brain. Cerebellum cortex has 3-4 layers (underlying white matter not considered a layer sometimes.