Subscapularis muscle
| Subscapularis muscle |
|---|
|
|
deep shoulder and chest muscles in humans
|
| origin |
| Subscapular fossa (front of the scapula ) |
| approach |
| Lesser tuberosity of the humeri |
| function |
| Adduction and internal rotation of the arm |
| Innervation |
| Subscapular nerve |
| Spinal segments |
| C5-C7 |
The subscapularis muscle ( Latin for "sub- shoulder blade muscle ") is one of the skeletal muscles in the shoulder area. It completely covers the inside of the shoulder blade . Together with the supraspinatus , infraspinatus and teres minor muscles , it forms the rotator cuff in humans , which holds the head of the humerus in the socket. Some fibers also radiate into the ligamentum transversum humeri .
function
The subscapularis muscle is the strongest internal rotator of the shoulder joint. Its lower part can adduct the arm (bring it closer to the body), while its upper part can abduct the arm (lift it away from the body, to the side).
clinic
The broad end tendon of the subscapularis muscle is an important protection against the anterior dislocation of the humerus. In the case of paralysis, the palm of the sick side can only be brought to the back with difficulty and with the support of the other muscles, since internal rotation is severely restricted.
See also
Individual evidence
- ↑ Jutta Hochschild: Understanding structures and functions: functional anatomy, therapy-relevant details. 3rd, unchanged. Edition. tape 1 : Basics of the spine, cervical spine and skull, thoracic spine and thorax, upper extremity . Georg Thieme, Stuttgart 2005, ISBN 3-13-110423-6 , p. 117 .
- ↑ AJ Waldeyer : Waldeyer - Anatomie des Menschen . Ed .: J. Fanghänel. 17th edition. 2003, p. 696 .
- ^ J. Sobotta: Sobotta - Atlas of the human anatomy . Ed .: R. Putz, R. Pabst. 21st edition. 2004, p. 190 .