Chvostek sign
Chvostek tremor

This is now known as the Chvostek sign.

The Chvostek sign is one of the signs of tetany seen in hypocalcemia.

This sign may become positive before other gross manifestations of hypocalcemia such as hyperreflexia and tetany, as such it is generally believed to be more sensitive (94%) than the Chvostek sign (29%) for hypocalcemia.