Abstract
1 . Attention is drawn to the not infrequent occurrence of downward subluxation of the shoulder joint accompanying fractures of the upper end of the humerus.
2. Such cases fall into early or late groups according to the time of onset of the subluxation.
3. The subluxation often disappears spontaneously, but it may persist and cause disability. It cannot safely be disregarded.
4. The etiology is discussed and experiments are described which lead to the conclusion that the subluxation is due chiefly to lack of tone in the scapulo-humeral muscles supporting the weight of the limb.
5. It is suggested that the use of a collar and cuff sling as a method of treatment for fractures of the shoulder is not without danger. A triangular sling usually prevents or cures the displacement.
