Branchial Motor Component

Branchial Motor Component - Cranial Nerves Branchial Motor...

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Cranial Nerves * Branchial Motor Component * provides voluntary control of the stylopharyngeus muscle which elevates the pharynx during swallowing and speech. * originates from the nucleus ambiguus in the reticular formation of the medulla. * Fibers leaving the nucleus ambiguus exit the medulla and joins the other components of CN IX along with CN X &XI to exit the skull via the jugular foramen. visceral motor component * Parasympathetic component of the glossopharyngeal nerve innervates the ipsilateral parotid gland. * preganglionic nerve fibers originate in the inferior salivatory nucleus of the rostral medulla * travels as the tympanic nerve to middle ear to provide general sensation * emerges from the middle ear as the lesser petrosal nerve * It then exist the skull via the foramen ovale and synapses with the otic ganglion * postsynaptic fibers leave the ganglion to innervate the parotid gland Hypothalamic Influence - Visceral Motor Component * Fibers from the hypothalamus and olfactory system project via the dorsal longitudinal
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This note was uploaded on 01/30/2012 for the course BSC BSC1085 taught by Professor Sharonsimpson during the Fall '10 term at Broward College.

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Branchial Motor Component - Cranial Nerves Branchial Motor...

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