What is "pathognomy"

Pathognomy \Pa*thog"no*my\, n. [Gr. ? passion + ? a judgment, fr. ?, ?, to know.] Expression of the passions; the science of the signs by which human passions are indicated.

n. The expression of the passions or emotions; the science of the signs by which human passions are indicated.

Pathognomy is the study of passions and emotions. It refers to the expression of emotions indicated by the voice, gestures and facial expression. While physiognomy is used to predict the overall, long-term character of an individual, pathognomy is used to ascertain clues about one's current character. Physiognomy is based on shapes of the features, and pathognomy on the motions of the features.