Procerus Sign

Procerus Sign

A focal dystonia of the procerus muscle, denoted the procerus sign, has been suggested to contribute to the "astonished", "worried" or "reptile-like" facial expression typical of progressive supranuclear palsy, which may also be characterized by reduced blinking, lid retraction, and gaze palsy. All contrast with the hypomimia of Parkinson’s disease.



Romano S, Colosimo C. Procerus sign in progressive supranuclear palsy. Neurology 2001; 57: 1928


Cross References

Blinking; Dystonia; Hypomimia; Parkinsonism