Skip to Content
Medical Term:


Pronunciation: af′ter-mūv′ment

Definition: Involuntary arm abduction that follows sustained isometric contraction of the deltoid and supraspinatus muscles (usually performed by pushing the upper extremity forcibly and against an immovable vertical surface while standing beside it).

Synonym(s): Kohnstamm phenomenon

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.