Procerus sign
| Procerus sign | |
|---|---|
| Other names | Vertical wrinkling of the forehead |
| Differential diagnosis | progressive supranuclear palsy, Parkinson's disease |
The procerus sign (vertical wrinkling of the forehead) is a medical sign consisting of vertical forehead wrinkling around the bridge of the nose and the glabella. This can be seen in neurodegenerative diseases such as progressive supranuclear palsy.
Definition
[edit | edit source]The procerus sign is defined as wrinkling around the bridge of the nose and the glabella.[1]
Differential
[edit | edit source]The procerus sign can be seen in neurodegenerative diseases such as progressive supranuclear palsy (PSP).[2] It is highly specific to PSP compared to other disorders involving Parkinsonism.[1]
Mechanism
[edit | edit source]Dystonia of the procerus muscle or the corrugator supercilii muscle leads to abnormal muscle contraction.[1] It is present both when the eyes are open and when they are closed, including during blinking.[3]
History
[edit | edit source]The procerus sign may also be known as "vertical wrinkling of the forehead" because it often does not just involve the procerus muscle.[1]
References
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