Anatomy and Cell Biology 2221 Lecture Notes - Lecture 9: Arrector Pili Muscle, Arteriole, Genitourinary System
27 Feb 2017
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Document Summary
Come out of the brainstem but still considered part of pns. Emerge from nose (1), eyes (2), inner ear (8), brainstem (3-12), and spinal cord (11) Some are pure sensory (special senses), pure motor or mixed. Tracts form this nerve reach the bulb at the base of the frontal lobe. Cribiform plate is art of the ethmoid bone. The holes permit nerves from the olfactory bulb to reach down into the sinus cavity and they are what are involved in smelling. Originate from retina (rods and cones) and projects posteriorly to optic chiasma. At optic chiasma, axons from medial half of each eye cross over. Synapse at primary visual field (occipital lobe) Oculomotor: muscles of the eye ( Trochlear: means pulley, motor nerves (superior oblique muscles, only one that emerges from the back surface of the pons, smallest. Abducens: motor, innervates lateral rectus abducts the eye. Skin of upper eye lid, cornea, lacrimal glands, upper portion of nasal cavity.
