BIOL 240 Lecture Notes - Lecture 22: Shingles, Intervertebral Foramina, Glossopharyngeal Nerve
Document Summary
Innervation of skeletal muscle: motor axons innervate skeletal muscle fibers at neuromuscular junctions = motor end plates, only place where there will be neurotransmitters, only in areas of contact. Innervation of visceral muscles and glands: smooth muscle. 12 pairs of nerves branching out from the brain: first two to forebrain, others to brain stem, carrying either sensory or motor. All except vagus n. (which extends to abdomen) innervate head and neck. In classic anatomy we use roman numerals to number the cranial nerves. Both, sensory and motor information: mixed nerves. They can also carry visceral sensory and visceral motor fibers. Damage to it causes blindness in visual field: unlike pns, does not regenerate. Provides eye movement: opening of eyelid, pupil sphincter. Moves eye down and out controls eye movement. Trigeminal nerve- v largest of cranial nerves by diameter. Main sensory nerve to face and muscles of mastication: touch, pain, temp.
