Procerus sign
Procerus Sign
Procerus sign (/proʊˈsɪərəs/), also known as Procerus scowl or Procerus wrinkle, is a clinical sign in neurology and dermatology that refers to the presence of transverse wrinkles on the bridge of the nose, caused by the contraction of the procerus muscle.
Etymology
The term "procerus" is derived from the Latin word procerus, meaning "tall" or "elongated". This is in reference to the vertical orientation of the procerus muscle in the human face. The term "sign" in medical parlance refers to an objective evidence of a disease perceptible to the examining physician.
Clinical Significance
The Procerus sign is often associated with various neurological and dermatological conditions. In neurology, it is commonly seen in patients with Parkinson's disease and other extrapyramidal disorders, where it is a result of the increased muscle tone and rigidity. In dermatology, it is often a sign of chronic sun exposure or aging, leading to the formation of deep, horizontal wrinkles on the bridge of the nose.
Related Terms
- Procerus muscle: A small pyramidal slip of muscle deep to the superior orbicularis oculi muscle.
- Parkinson's disease: A long-term degenerative disorder of the nervous system that mainly affects the motor system.
- Extrapyramidal disorders: A group of diseases characterized by abnormal movements resulting from the dysfunction of the extrapyramidal system.
- Neurology: The branch of medicine dealing with disorders of the nervous system.
- Dermatology: The branch of medicine dealing with the skin, nails, hair and its diseases.
External links
- Medical encyclopedia article on Procerus sign
- Wikipedia's article - Procerus sign
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