Schaeffer's sign

Schaeffer's sign
Synonyms
Pronounce	N/A
Specialty	N/A
Symptoms	Absence of contraction of the platysma muscle
Complications
Onset
Duration
Types
Causes	Upper motor neuron lesion
Risks
Diagnosis	Neurological examination
Differential diagnosis
Prevention
Treatment
Medication
Prognosis
Frequency
Deaths

``` This template provides a structured format for presenting information about Schaeffer's sign, a clinical sign observed in neurology. It includes fields for various aspects of the condition, such as its name, field of study, symptoms, causes, and methods of diagnosis. Internal links are used to connect key terms to their respective articles, facilitating further exploration of related topics. Schaeffer's sign is a clinical sign in which there is a pulsation in the popliteal artery that is synchronous with the heart rate. This sign is often associated with aortic insufficiency and is named after the German physician, Friedrich Schaeffer.

Clinical Significance

Schaeffer's sign is a physical examination finding that is often associated with aortic insufficiency. Aortic insufficiency, also known as aortic regurgitation, is a condition where the aortic valve does not close tightly. This allows some of the blood that was pumped out of the heart's main pumping chamber (left ventricle) to leak back into it. The sign is elicited by palpating the popliteal artery. If the artery is pulsating in sync with the heart rate, this is considered a positive Schaeffer's sign. This sign is not specific to aortic insufficiency and can be seen in other conditions as well.

History

The sign is named after Friedrich Schaeffer, a German physician who first described it.

See Also

• Aortic insufficiency
• Popliteal artery
• Friedrich Schaeffer