thumb In medicine, the<unk>  is the ability to touch the tip of the nose or chin with the tongue. Approximately 5 per cent of the general population can perform this act, whereas fifty per cent of people with the inherited connective tissue disorder, Ehlers–Danlos syndrome, can. Named after pathologist Robert J.<unk> , it should not be confused with<unk>  syndrome, a serious inherited medical condition also named after him.
Gorlin sign
Westermark sign
Claybrook sign
Markle sign
Amsler sign
Boas' sign
Crichton-Browne sign
Halo sign