[Disinsertion of the subscapularis muscle in the treatment of obstetric paralysis of the upper limb (author's transl)].

Proximal disinsertion of the subscapularis is an effective operation in the correction of an abnormal position in internal rotation of the shoulder. Such a decision should be taken only if the head of the humerus is still well rounded. Restoration of movement by muscular transfer of active external rotation is performed in subsequent months only if the teres minor and infraspinatus muscles do not recover spontaneously.