Friday, May 18, 2012


Pronator drift is a sign of upper motor neurone lesion

Patient is asked to hold out both arms at shoulder level, fully extended with forearms supine, and hold the position.

If the patient is unable to hold the position and the forearm pronates, then pronator drift is positive and the patient most likely has a contralateral pyramidal tract (UMN) lesion.

Closing the eyes accentuates it.

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