LING 2P90 Lecture Notes - Lecture 2: Substantia Nigra, Stapedius Muscle, Cranial Nerves
3 Mar 2016
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Document Summary
Thalamus: egg-shaped, collection of nuclei, relay station for all sensory information except smell, on way to somatosensory cortex. Basal ganglia: the striatum: caudate nucleus + putamen, globus pallidus, subthalamic nucleus, substantia nigra, coronal section with labels, part of the brain"s control circuitry , responsible primarily for inhibition of involuntary movements (problems cause resting tremors). Depletion of dopamine from substantia nigra results in. Damage also can cause chorea (slow writing movements) Speech can be affected if the facial muscles are uncontrolled, as well as pitch control and loudness. Responsible for coordination of fine motor movements and skilled movements. Inhibition of involuntary movements such as intentional tremors, over- and under- shooting, dysmetria (can also happen for oral targets and voice control, can sound drunk) Dorsal/posterior median septum vs ventral/anterior median fissure. Dorsal primary ramus (nerve root) vs ventral primary ramus (nerve root) joint of the nerve roots is the spinal nerve.
