Magnan sign

Mag·nan sign

(mah-nyahn'),

paresthesia in the psychosis of cocaine addicts, who imagine they have a foreign body, in the shape of a powder or fine sand, under the skin, and that it is constantly changing its position.

Magnan sign

An obsolete term for formication, specifically of cocaine addicts
The term is attributed to Valentin JJ Magnan (1835-1916), French psychiatrist.

Mag·nan sign

(mah-nyan[h]' sīn)

Paresthesia in the psychosis of cocaine addicts, who imagine they have a foreign body in the shape of a powder or fine sand under the skin, and that it is constantly changing its position.
Synonym(s): coke bugs.

Magnan,

Valentin Jacques Joseph, French psychiatrist, 1835-1916.

Magnan sign - paresthesia in the psychosis of cocaine addicts.

Magnan trombone movement - involuntary forward and back movement of the tongue when it is drawn out of the mouth in several basal ganglia disorders.