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29 Cards in this Set
- Front
- Back
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what are the branchial motor innervations of the facial nerve?
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-stapedius
-stylohyoid -post digastric -mm of facial expression |
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what are the visceral motor innervations of the VIIth nerve?
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-lacrimal, sublingual, and submandibular glands
-mucous membranes of nose and hard and soft palates |
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what are the sensory innervations of VII?
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-taste from ant 2/3 of tongue (chorda tympani)
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do the upper or lower facial expression mm have bilateral cortical innervation?
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-the upper ones are bilateral
-lower are only contralateral |
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what would a unilateral UMN lesion of VII present with?
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-only lower facial expression weakness on contralteral side
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what would a unilateral LMN lesion of VII present with?
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-weakness of all facial expression mm on ipsilateral side
-bells palsy |
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what reflexes are mediated by the branchial motor portion of VII?
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-blink reflex to light (II)
-corneal stimulation (V) -stapedius reflex to mute loud noise (VIII) -suck reflexes to oral stimulation |
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what other CN might be affected in a lesion of VII in the pons?
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-VI
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what other CN might be affected if a lesion of VII in the acoustic meatus?
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-VIII
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at what part of the spiral ganglia are high frequencies produced?
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-the base
-then on to DORSAL cochlear nuc |
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when do the auditory pathways of CN VIII become bilateral?
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-above level of cochlear nuclei
-lesions above cochlear nuclei rarely cause hearing loss |
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weber test?
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-tuning fork on vertex of head
-should be heard equally in both ears -if not it indicates sensorineural problems |
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rinne test?
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-air vs bone conduction of sound
-air should conduct better |
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where are the vestibular nuclei?
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-lateral pons
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how do vestibular nuclei project to the cerebellum? and what is the fn of this connection?
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-via inferior cerebellar peduncles
-reciprocal connections coordinate balance during movement |
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how does the lateral vestibular nucleus project to the spinal cord? and what is the fn of this connection?
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-vestibulospinal tract
-influences tone of antigravity mm |
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how do the eyes move when cold water is put into the right ear?
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-slowly to the right
-then quickly back to the left |
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what are the motor innervations of IX?
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-stylopharyngeus
-otic ganglion/parotid gland |
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what are the sensory innervations of IX?
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-taste and general sensation from post 1/3 of tongue
-carotid body/sinus |
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what are the branchial motor innervations of X?
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-striated mm of pharynx, palatoglossus and larynx
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what are the visceral motor components of X?
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-smooth mm of the pharynx, larynx and thoracic/abdominal viscera
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what are the visceral sensory components of X?
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-larynx
-trachea -esophagus -viscera -aortic arch |
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what are the general sensory components of X?
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-skin on back of ear
-external acoustic meatus -ext tympanic membrane -pharynx |
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what lesion would cause vocal cord paralysis and hoarseness?
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-recurrent laryngeal lesion
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what does XI innervate?
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-traps
-SCM |
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what does an XI lesion present with?
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-shoulder droop
-weakness of head turning side opposite of lesion |
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what is the pathway of XI fibers?
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-CBs in lateral spinal cord anterior gray
-fibers exit lateral cord and C1 to C5 -ascend thru foramen magnum -exit jugular foramen |
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what does CN XII innervate?
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-all intrinsic and extrinsic tongue muscles except palatoglossus (X)
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what would a XII lesion present with?
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-tongue deviation otward side of LMN lesion
-UMN lesion causes tongue deviation away from side of legion |
