PSYC 2200H Lecture Notes - Lecture 4: Trochlear Nerve, Vagus Nerve, Medial Rectus Muscle

• School: Trent University
• Department: Psychology
• Course: PSYC 2200H
• Professor: Fournier Neil

Document Summary

Massive injury to brain stem- lose reflexes, leads to death. Sensory cranial nerves: contain only afferent (sensory fibres) Motor cranial nerves: contains only efferent (motor fibres) Mixed cranial nerves: contains both sensory and motor fibres. Vii facial nerve (ability to move your facial muscles. Damage creates difficulty moving the face, so they have a flaccid facial expression. If they have a lesion on one of the nerves, they will have paralysis on one side of the face) Ix glossopharyngeal nerve (works together with the vagus nerve. X vagus nerve (if you lose vagal input to the heart, it starts beating very fast. Motor response of throwing up comes from the vagus complex) Psychological feeling of being sick (nervous)- this is being mediated by the insula. Cranial nerve function & muscle innervation relative to eye movement. Trochlear nerve allows your eyes to move down. If you damage it, your eyes move up and out.