an orthotic for mounting on a user &# 39 ; s arm comprises an upper cuff that is removeably attachable to the user &# 39 ; s arm at a point above the elbow joint . a lower cuff is removeably attachable to the user &# 39 ; s arm at a point below the elbow joint , and is rotationally fixed to the forearm . at least one flexible elongated member having a first end that is releasably coupled to the upper cuff and an opposite second end that is releasably coupled to the lower cuff . the upper cuff and the lower cuff are configured to move in more than one plane with respect to one another .