Abstract
Medial elbow joint complex injuries have been reported in competitive and recreational athletes. Ultrasound imaging (USI) is a common method for assessing the morphology of the ulnar collateral ligament (UCL). Previous research has indicated that the long wrist flexor muscle group may also function secondarily as an active stabilizer of the medial elbow joint complex. It is surmised that the relative strength of this muscle group may reduce the load placed on the UCL, thereby potentially altering the morphology of the UCL and displacement of the medial elbow joint space (MJS) as determined through sonography.