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Twitching of facial muscles when the facial nerve is tapped anterior to the earlobe is called:

Twitching of facial muscles when the facial nerve is tapped anterior to the earlobe is called: Correct Answer Chvostek's sign

Concept:

  • Involuntary muscle contractions resulting due to abnormal electrical activity of the muscles is known as twitching.
  • The facial nerve is a pathway from your brain to certain muscles in your face. It controls muscles that help you make expressions like raising an eyebrow, smiling or frowning
  • The branches are, from top to bottom:-
    • frontal (or temporal)
    • zygomatic
    • buccal
    • marginal mandibular
    • cervical.

Explanation:

  • Chvostek's sign is a condition commonly seen in the patients of hypocalcemia.
  • Calcium (serum) Normal levels -> 8.6-10.3 mg/dL
  • It is the twitching of the facial muslce due to increased tapping on a nerve innervating the anterior to the ear lobe.

Additional Information

  • Trousseau's sign: A twitch in the arm induced by the blood pressure cuff.
  • Homan's sign: Pain at the calf muscle due to a forced dorsiflexion.
  • Brudzinski's sign : Hip and knee flixeion caused due a neck stiffness.

 

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