Strümpell's sign
Encyclopedia
Strümpell's sign is a clinical sign
Medical sign
A medical sign is an objective indication of some medical fact or characteristic that may be detected by a physician during a physical examination of a patient....

 in which the patient's attempt to flex
Flexion
In anatomy, flexion is a position that is made possible by the joint angle decreasing. The skeletal and muscular systems work together to move the joint into a "flexed" position. For example the elbow is flexed when the hand is brought closer to the shoulder...

 the knee against resistance elicits an extensor plantar reflex
Plantar reflex
The plantar reflex is a reflex elicited when the sole of the foot is stimulated with a blunt instrument. The reflex can take one of two forms. In normal adults the plantar reflex causes a downward response of the hallux...

. It is found in patients with pyramidal tract
Corticospinal tract
The corticospinal or pyramidal tract is a collection of axons that travel between the cerebral cortex of the brain and the spinal cord....

 lesions, and is one of a number of Babinski-like responses.

The sign is named after Adolph Strümpell
Adolph Strümpell
Ernst Adolf Gustav Gottfried von Strümpell was a German neurologist who was born at Neu-Autz Estate, Courland Governorate...

.
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