The test involving tapping the facial nerve around the zygomatic arch is known as what?

The test involving tapping the facial nerve around the zygomatic arch is known as the Chvostek sign. This neurological assessment is used to evaluate for facial nerve irritability, which can be indicative of conditions such as hypocalcemia. When the facial nerve is tapped, the characteristic response is a twitch of the facial muscles, particularly around the eye or mouth, which suggests increased neuromuscular excitability.

Understanding the context of the other test names helps clarify why Chvostek sign is the correct answer. Trousseau sign is associated with carpal spasm induced by inflating a blood pressure cuff, which tests for latent tetany, often related to hypocalcemia as well. The Lachman test is specifically used to assess the integrity of the anterior cruciate ligament in the knee. Meanwhile, the Phalen test is employed to diagnose carpal tunnel syndrome by producing symptoms of tingling or numbness in the fingers when the wrists are flexed. Each of these tests serves different diagnostic purposes, confirming that the Chvostek sign stands out as the test specifically targeting the facial nerve.