PSL440Y1 Lecture Notes - Lecture 4: Lower Motor Neuron, Vestibular Nuclei, Premotor Cortex
Document Summary
Cerebellum sends projections to premotor centers that themselves control motor centres. Massive parallel fibres going across to give it a stripe- like structure on the back of the cerebellum. Occupies lateral part of cerebellum. Regulated highly skilled movements and sequential movements including speech: dysarthria slurred/garbled speech. Spinocerebellum median and paramedian zone (in the middle, or just beside the middle) Only part that receives direct spinal input (from the clark"s column) Paramedian part more concerned with control of distal muscles. Median strip called vermis regulates proximal muscles and eye movements. Oldest part found at caudal and inferior part of cerebellum. Input from vestibular nuclei and regulates movements for postural control and equilibrium as well as vestibule- ocular reflex (vor) Connects cerebellum to midbrain (pons: output going from deep cerebellar nuclei, particularly dentate going out to cerebrum. Middle cerebellar peduncle (brachium pontis) Cell bodies of this path in pontine nuclei, which get input from large area of cerebral cortex and superior colliculus.
