<prompt> What is this sign called?Chvostek signTroisiers signTrousseaus signLhermittes sign  <response>: The image shows presence of trousseau signCarpo-pedal spasm seen in patients of Hypocalcemia. Chvostek sign Elicited by tapping over anterior border of parotid gland and seen in tetany. Troisiers sign Left supraclavicular lymphadenopathy in metastatic abdominal malignancy. Lhermittes sign The Barber chair phenomenon is the name which describes an electric shock-like sensation that occurs on flexion of the neck. This sensation radiates down the spine, often into the legs, arms, and sometimes to the trunk 