Orthotic devices for serratus anterior palsy: some biomechanical considerations.

The pathomechanics of serratus anterior palsy are reviewed to provide a physiological basis for designing an effective brace. The problems involved in the practical application of the brace and the effectiveness of the brace in controlling the biomechanical dysfunctions are discussed. Two modifications of the basic brace and their effects on the patients' shoulder functions are presented. The main benefit of scapular bracing is control of scapular winging, while loss of active scapular rotation and medial scapular displacement cannot be effectively corrected.