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47 Cards in this Set
- Front
- Back
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The temporal branch of the facial nerve innervates which muscles?
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frontalis muscle, corrugator supercilii, procerus
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The temporal/zygomatic branch of the facial nerve innervates which muscles?
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orbicularis oculi
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The zygomatic/buccal branch of the facial nerve innervates which muscles?
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zygomaticus major
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The buccal branch of the facial nerve innervates which muscles?
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zygomaticus minor, levator labii superioris, levator labii superioris alaeque nasi, risorius, buccinator, levator anguili oris, nasalis
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The buccal/mandibular branch of the facial nerve innervates which muscles?
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depressor anguli oris
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The mandibular branch of the facial nerve innervates which muscles?
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depressor labii inferioris, mentalis
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The cervical branch of the facial nerve innervates which muscles?
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platysma
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The nerve to posterior digastric and stylohyoid muscle innervate which muscles?
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anterior belly of diagrstric muscle and stylohyoid muscles
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The somatic afferent fibers of the facial nerve innervates what?
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skin of the external auditory meatus
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The greater palatine nerve innervates what?
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palatal, nasal and pharyngeal mucosa
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The temporal branch of the facial nerve innervates which muscles?
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frontalis muscle, corrugator supercilii, procerus
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The temporal/zygomatic branch of the facial nerve innervates which muscles?
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orbicularis oculi
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The zygomatic/buccal branch of the facial nerve innervates which muscles?
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zygomaticus major
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The buccal branch of the facial nerve innervates which muscles?
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zygomaticus minor, levator labii superioris, levator labii superioris alaeque nasi, risorius, buccinator, levator anguili oris, nasalis
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The buccal/mandibular branch of the facial nerve innervates which muscles?
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dpressor anguli oris
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What does the chorda tympani innervate?
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submandibular and sublingual glands, taste buds of the anterior 2/3 of the tongue
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What does the greater superficial petrosal nerve innervate?
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lacrimal, nasal and palatine glands
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What does the auriculotemporal nerve innervate?
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parotid gland
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What is the function of the frontalis muscle?
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brow elevation
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What is the function of the corrugator supercilii?
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brow medialization/depression
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What is the function of the procerus?
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brow depression; production of transverse wrinkles of the nasal radix
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What is the function of the orbicularis oculi?
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eyelid closure
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What is the function of the zygomaticus major?
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lateral upper lip elevation (primary smile actuator)
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What is the function of the zygomaticus minor?
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upper lip elevation
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What is the function of the levator labii superioris?
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upper lip elevation; elevation of nasolabial fold
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What is the function of the levator labii superioris alaeque nasi?
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upper lip elevation; elevation of medial-most nasolabial fold
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What is the function of the risorius?
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oral commisure lateral retraction (additional smile actuator)
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What is the function of the buccinator?
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cheek compression
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What is the function of the levator anguli oris?
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oral commissure elevation and medialization
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What is the function of the nasalis?
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dilates and constricts nares (via transverse and alar heads)
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What is the function of the depressor anguli oris?
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oral commisure depression
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What is the function of the depressor labii inferioris?
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lower lip depression
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What is the function of the mentalis?
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chin soft tissue elevation
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What is the function of the platysma?
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oral commisure depression
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What is the function of the anterior belly of the digastric muscle and stylohyoid muscle
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hyoid elevation
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What are the 2 causes of congenital (neonatal) facial paralysis?
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Mobius syndrome, obstetrical facial paralysis (from forceps)
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What is Mobius syndrome?
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a defect in development of facial nucleus; often associated with paralysis of extraocular muscles
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What infections are associated with facial paralysis?
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herpes zoster, bacterial otitis externa, bacterial otitis media, mastoiditis, parotitis, varicella zoster
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What is the most common form of facial paralysis?
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Bell's palsy
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What percentage of Bell's palsy patients have at least partial recovery?
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90%
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What percentage of Bell's palsy patients have total recovery?
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50%
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What is the treatment for Bell's palsy?
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steroids (need otherwise normal exam and normal audiogram first)
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What is Bell's phenomenon?
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presence of superolateral duction of the eye on attempting lid closure
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What are the motor branches of the facial nerve?
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temporal, zygomatic, buccal, mandibular and cervical. Remember: Two Zebras Bit My Cat
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What are the 3 most common causes of adult facial paralysis?
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Bell's palsy, trauma, Ramsay Hunt syndrome
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What is the Ramsay Hunt syndrome?
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herpes zoster oticus which presents with facial paralysis and ear pain
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What nerve innervates the anterior belly of the digastric muscle?
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trigeminal nerve
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