21 Temmuz 2014 Pazartesi

Facial Nerve (CN VII)

Facial Nerve (CN VII)


ANATOMY
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Corneal reflex: principal nucleus of V, motor nucleus of VII
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  • Bills's bar - separates facial and superior vestibular nerve
  • Transverse crest - separates facial and cochlear from superior and inferior vestibular nerves

PATHOLOGY
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Sarcoid



HISTORY & PHYSICAL EXAM
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  • Frontalis             --> wrinkle forehead, look up
  • Orbicularis oculi  --> close eye while examiner attempts to open
  • Buccinator          --> purse lips while examiner presses cheeks
  • Orbicularis oris    -> show teeth

House Brackmann Scale
1   Normal
2   Slight mouth asymmetry with effort, normal at rest
3   Obvious weakness / asymmetry
4   Incomplete eye closure
5   Asymmetric at rest, no forehead movement
6   Total paralysis

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