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Cranial Nerves Func.

Function of the Cranial Nerves

NerveFunction
trigeminal nerve: sensory principle sensory nerve for the head, face, and oral cavity
trigeminal nerve: sensory mediates the sensations of pain, temperature, and discriminative touch
trigeminal nerve: sensory three branches: opthalmic, maxillary, and mandibular
trigeminal nerve: motor small motor component that controls mastication muscles, bilateral projections
facial nerve: motor innervates all the muscles of facial expression
facial nerve: motor innervates the stapedius muscle (in middle ear)
facial nerve: motor parasympathetic system efferents to the lacrimal, sublingual, and submandibular glands
facial nerve: sensory mediates the taste sensation from the anterior two-thirds of the tongue
Facial nerve: bilateral innervation upper half of face receives bilateral innervation, lower half of the face only receives contralateral projections
Facial nerve: unilateral innervation lower half of the face only receives contralateral projections, upper half of face receives bilateral innervation
Vestibuloacoustic Nerve: two branches vestibular division: mediates head position in space; acoustic division: serves hearing
Glossopharyngeal Nerve: sensory mediates touch, pain, tension, and temperature sensations from the upper pharynx, tonsils, Eustachian tube, soft palate, and posterior third of the tongue
Glossopharyngeal Nerve: efferent regulates secretions from the parotoid gland in the oral cavity
Vagus Nerve: visceral afferent mediates general sensation from muscles of the pharynx, larnyx, thorax, and abdomen
Vagus Nerve: visceral afferent important for safe swallowing function
Vagus Nerve: visceral efferent innervates the viscera: cardiac muscles; and smooth muscles of trachea, esophagus, stomach and intestines
Vagus Nerve: visceral efferent mediates taste sensation from the pharyngeal nerve
Vagus Nerve: reflexes swallowing, gaggin, coughing, sneezing, vomiting, breathing, and cardiac rate
Hypoglossal Nerve controls tongue movement, innervates all intrinsic and most extrinsic tongue muscles, only contralateral projections
Created by: sullivancl
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