Glabellar reflex
Glabellar reflex
The Glabellar reflex, also known as Myerson's sign or the nose tap sign, is a physical examination finding. It is elicited by repetitive tapping on the forehead. Patients with a positive glabellar reflex will continue to blink in response to each tap.
Pronunciation: /ɡləˈbɛlər ˈriːflɛks/
Etymology: The term "glabellar" comes from the Latin word "glabellus", meaning smooth, and the term "reflex" comes from the Latin word "reflexus", meaning bending back.
Clinical significance
The glabellar reflex is often used in neurological examinations to assess for frontal release signs, which are primitive reflexes released from the control of higher cortical centers. A positive glabellar reflex is commonly seen in Parkinson's disease, but can also be present in other conditions such as Alzheimer's disease, dementia, and stroke.
Related terms
- Frontal release signs
- Primitive reflexes
- Neurological examination
- Parkinson's disease
- Alzheimer's disease
- Dementia
- Stroke
See also
External links
- Medical encyclopedia article on Glabellar reflex
- Wikipedia's article - Glabellar reflex
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