MORE VIDEOS
Explore more

Pronator drift

System: Neurological Signs · All neurological signs

What it is — and how it is elicited

With the arms held straight out, palms up and eyes closed, one arm slowly turns palm-down and drifts downward.

What a positive finding suggests

Associated with mild corticospinal (upper motor neuron) weakness of that arm.

Related signs — Neurological Signs

Abdominal reflexesArgyll Robertson pupilBabinski signBattle's signBeevor's signBrisk jaw jerk

Browse the P section of the A–Z list or return to the Clinical Signs hub.

Please note: This page is an educational reference about clinical examination signs. A clinical sign supports — and never replaces — a full clinical evaluation, examination and appropriate testing. A sign being present does not by itself prove a diagnosis, and an absent sign does not rule one out. If you have symptoms that worry you, see a health professional.