Chvostek sign

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Science and technology

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What Wikipedia says

The Chvostek sign () is a clinical sign that someone may have a low blood calcium level (a decreased serum calcium, called hypocalcemia). The Chvostek sign is the abnormal twitching of muscles that are activated (innervated) by the facial nerve (also known as Cranial Nerve Seven, or CNVII).

Excerpt from the Wikipedia article “Chvostek sign”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: MarcoMutMut, CC BY-SA 3.0, via Wikimedia Commons.