Examations of the facial nerve

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Facial nerve
Examination of the facial nerve
  • Observe the patient as he talks & smiles; watch for:

    • Eye closure
    • Asymmetrical elevation of the one corner of the mouth
    • Flattening of nasalabial folds

  • Then the patient is instructed to:

    • Wrinkle the forehead (By looking upwards with still head) : Frontalis
    • Close eyes while examiner tries to open them : Orbicularis oculi
    • Purse lips while the examiner presses cheeks : Buccinator
    • Show teeth : Orbicularis oris

  • Taste : Place sugar & salt in the anterior 2/3 of the protruding తొన్గుఎ

Functions
Motor nucleus supplies:
  • Muscles of facial expression
  • Auricular muscles
  • Stapedius muscle
  • Posterior belly of the Digastric muscle
  • Stylohyoid m

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