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22 Cards in this Set
- Front
- Back
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what kind of fibers are in the glossopharyngeal nerve?
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motor, sensory, parasympathetic
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where do fibers of glossopharyngeal nerve go?
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tongue and pharynx
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where does CN IX send sensory branches?
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posterior 1/3rd of tongue including vallate papillae, pharynx
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what kinds of innervation does CN IX supply to posterior 1/3rd of tongue?
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general sensation and taste
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what muscles do the CN IX innervate?
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stylopharyngeus = muscle of pharynx
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what does the stylopharyngeus do?
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assists in swallowing
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where do the parasympathetic fibers of CN IX go?
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1. preganglionic end in otic ganglion via V3
2. postganglionic supply parotid via V3 |
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what would happen if the parasympathetic branches of CN IX were cut?
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no saliva from parotid
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what kinds of fibers does the vagus nerve, CN X carry?
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motor, sensory, parasympathetic
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what's the general distribution of the motor, sensory and parasympathetic fibers of the vagus nerve, CN X?
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motor and sensory in head and neck
sensory and parasympathetic in thorax and abdomen supplying viscera motor just in head/neck sensory everywhere parasympathetic just in thorax/abdomen |
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what's another name kumari gives for vagus or CN X?
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wandering cranial nerve
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what muscles does the vagus nerve innervate?
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muscles of pharynx, larynx and soft palate - some exceptions
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what actions do the motor innervation of vagus nerve help with?
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swallowing, phonation, articulation of speech
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what are the major sensory functions of the vagus nerve?
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1. supplies mucous membrane of larynx
2. some taste sensation from epiglottic area 3. most sensory info from linings of thoracic and abdominal viscera |
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what do PREganglionic fibers of vagus supply?
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parasympathetic ganglia on walls and viscera that have not been named yet
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where do POSTganglionic fibers of vagus go?
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supply heart, smooth muscles and secretory glands of thoracic and abdominal viscera
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what kinds of fibers does the accessory nerve, or CN XI have?
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just motor
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what's the path of the accessory nerve or CN XI?
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starts at upper cervical spinal cord
enters cranium through foramen magnum joins "cranial accessory" leaves cranium through jugular foramen separates off from cranial accessory which then joins the vagus nerve crosses roof of posterior triangle |
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what kind of fibers does the hypoglossal nerve carry?
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just motor
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what does the hypoglossal nerve do? CN XII
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supplies tongue muscles with one exception
supplies styloglossus, genioglossus, hyoglossus controls shape, movement of tongue helps in mastication, speech, swallowing |
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what action are the genioglossus muscles responsible for? what action of tongue can hypoglossal nerve take credit for?
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pointy tongue
each genioglossus contracts, pushing tongue out and pulling sides closer to midline |
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if a patient could not poke tongue out in middle, but it went to one side or other, what nerve would be affected?
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hypoglossal - CN XII
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