NURS 106 Lecture Notes - Lecture 18: Medulla Oblongata, Cranial Nerves, Olfactory Bulb
19 Oct 2018
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Innervate the periphery emerging from the brain stem. Inferior to midbrain, superior to medulla, anterior to cerebellum (cn v, vi, vii, vii - vestibule. Lower portion of diencephalon to pons (nuclei of cn iii and iv) Inferior to pons, continuous with the spinal cord (cn viii - cochlea, hearing ix, x, xi, xii in equilibrium in pons) *cn i - smell cn ii - vision, but does not have to go through the brain stem. In the thalamus ), then to the occipital. Controls extraocular eye muscles superior, inferior and medial rectus inferior oblique. *exceptions - superior oblique (near cn iv-trochlea) and lateral rectu (cn vi-abducens) levator palpebrae superioris. Controls only the superior oblique in the extraocular muscles (motor function) Sensations from the lower eyelid, upper lip and cheek. Ophthalmic and maxillary (pons) and mandibular muscles. Controls only the lateral rectus in the eye muscle. Cn ix:the glossopharyngeal nerve motor) pharyngeal muscles for swallowing.
