Abstract
This study is intended to pursue the role of the long head of the biceps (hereafter referred to as long head) in the abduction of the upper extremities, and to review the technique of reconstructing the rupture of the long tendon by understanding the significance of the long head in shoulder movements.
The subjects were patients with a rupture of the long head in 6 shoulders and musculocutaneous nerve palsy in one shoulder.
The subjects were exercised for abduction of the upper extremities with a scapular plane, then, the locus was taken for the movement of the glenoid fossa and the head of the humerus. This technique was performed before and after reconstruction of the tendon in the above mentioned cases, and the results were reviewed comparatively in due course.
Comparisons were made of the locus of the glenoid fossa and the head of the humerus in motion, time of abduction with the scapular plane in each stage in the afore mentioned cases, and the following results were obtained.
1. Rupture of the long head resulted in disorder of the locus of the glenoid fossa and the head of the humerus.
2. After a long time, only suturing the ruptured long head into the bicipital groove without end-to-end sutures resulted in the head of the humerus and glenoid fossa being in the same locus as the controls.
