| Question |
origin |
insertion |
action |
| Subscapularis |
Subscapular fossa of the scapula |
Lesser tubercle of humerus |
Shoulder medial rotation |
| Coracobrachialis |
Coracoid process of the scapula |
medial surface of the humerus near the midpoint |
Stabilizes the shoulder joint |
| Anterior Deltoid |
Lateral 3rd of the clavicle |
Deltoid tuberosity of the humerus |
Shoulder abduction, flexion, medial rotation, horizontal abduction |
| Middle Deltoid |
Acromium process |
Deltoid tuberoisity of the humerus |
Shoulder abduction |
| Posterior Deltoid |
Spine of scapula |
Deltoid tuberoisity of humerous |
Shoulder abduction, extension, lateral rotation, horizontal abduction |
| Supraspinatus |
Supraspinous fossa of the scapula |
Greater tubercle of the humerus |
Shoulder abduction |
| Pecoralis Major |
Medial 3rd of clavicle and sternum at costal cartilage of the first 6 ribs |
Lateral lip of bicipital groove of humerus |
Shoulder adduction, medial rotation, horizontal addution |
| Latissimus Dorsi |
Spinous processes of T-7-L5, posterior sacral surface, iliac crest, & lower 3 ribs |
Medial lip of bicipital groove of humerus |
Shoulder extension adduction, medial rotation |
| Teres Major |
Auxilary border of scapula near inferior angle |
Crest below lesser tubercle (next to latissimus dorsi muscle attachment) |
Shoulder extensiion abduction and medial rotation |
| Upper Trapezius |
Occipital Protuberance & Spinous Processes of upper cervical vertebrae |
Lateral end of clavicle and the acromion process |
scapular elevation and upward rotation |
| Middle Trapezius |
Spinous processes of C 7-T3 |
Scapular spine |
Scapular retraction |
| Lower Trapezius |
Spinous processes of mid/lower thoracic vertebrae |
Base of the scapular spine |
Scapular depression and upward rotation |
| Levator Scapula |
Transverse processes of C1-C4 |
Vertebral border of scapula btn superior angle and spine |
Scapular elevation and downward rotation |
| Rhomboid Muscles |
Spinous processes of C7-T5 |
Vertebral border of scapula btn spine and inferior angle |
Scapular retraction, elevation and downward rotation |
| Serratus anterior |
Lateral surface of upper 8 ribs |
Vetebra border of scapula, anterior surface |
Scapular protraction and upward rotation, "prevents winging" |
| Pectoralis Minor |
Anterior surface, 3rd-5th ribs |
Coracoid process of scapula |
Scapular depression, protraction, downward rotation and tilt |
| Infraspinatus |
Infraspinous fossa of scapula |
greater tubercle of humerous |
shoulder lateral rotation, horizontal abduction |
| Teres Minor |
Auxilary border of scapula |
Greater tubercle of humerus |
Shoulder lateral rotation, horizontal abduction |
Spanish 3
