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Pronator drift : ウィキペディア英語版 | Pronator drift In medicine, pronator drift (also known as pyramidal drift) refers to a pathologic sign seen during a neurological examination. Jean Alexandre Barré is credited with having first described it thus it is sometimes known as the Barré test or sign. A positive result indicates spasticity. This sign can appear due to an upper motor neuron lesion〔Pronator drift. gpnoebook.co.uk. URL: (http://www.gpnotebook.co.uk/simplepage.cfm?ID=503709725 ). Accessed On: October 23, 2008.〕〔(【引用サイトリンク】title=The Precise Neurological Exam )〕 or various other conditions (including inborn errors of metabolism) which include spasticity as a symptom. ==Description==
The patient is asked to hold both arms fully extended at shoulder level in front of them, with the palms upwards, and hold the position. If they are unable to maintain the position the result is positive. Closing the eyes accentuates the effect, because the brain is deprived of visual information about the position of the body and must rely on proprioception. Tapping on the palm of the outstretched hands can accentuate the effect.
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