Dr. Neuro on Instagram: "Chvostek sign 🔔 What it is: Chvostek sign is a clinical sign of neuromuscular excitability, most commonly seen in hypocalcemia. How to elicit: Gently tap the facial nerve just anterior to the ear, at the angle of the jaw. Use your finger or a reflex hammer. Positive sign: Twitching of facial muscles on the same side: Corner of mouth Nose Eyelids Why it happens (pathophysiology): Low serum calcium → increased neuronal membrane excitability This makes the facial nerve hyp