| Question | Answer |
| Coracobrachialis action | Flex the shoulder
Adduct the shoulder |
| Corachobrachialis origin | coroid process of the scapula |
| Corachobrachialis insertion | medial surface of mid-humeral shaft |
| Corachobrachialis nerves | musculocutaneous C6, 7 |
| Latissimus Dorsi action | -Extend the shoulder
-Adduct the shoulder
-Medially rotate the shoulder |
| Latissimus Dorsi origin | Inferior angle of scapula, spinous processes of last six thoracic vertebra, last 3 or 4 ribs, thoracolubar aponeurosis and posterior iliac crest |
| Latissimus Dorsi insertion | Intertubercular groove of the humerus |
| Latissimus Dorsi nerves | Thoracodorsal C6,7,8 |
| Teres Major Action | -Extend the shoulder
-Adduct the shoulder
-Medially rotate the shoulder |
| Teres Major origin | Inferior angle and lower one-third of lateral border of the scapula |
| Teres Major Insertion | Crest of teh lesser tubercle of the humerus |
| Teres Major Nerve | Lower subscapular C5,6,7 |
| Teres Minor Action | -Laterally rotate the shoulder
-Adduct the shoulder
-Stabilize the head of humerus in glenoid activity |
| Teres Minor Origin | Upper two/thirds of lateral border of the scapula |
| Teres Minor Insertion | Greater tubercle of the humerus |
| Teres Minor Nerve | Axillary C5,6 |
| Infraspinatus Action | -Laterally rotate the shoulder
-Adduct the shoulder
-Stabilize the head of humerus |
| Infraspinatus Origin | Infraspinous fossa of the scapula |
| Infraspinatus Insertion | Greater tubercle of the humerus |
| Infraspinatus Nerve | Suprascapular C(4),5,6 |
| Supraspinatus Action | Abduct the shoulder
Stabilize the head of humerus |
| Supraspinatus origin | Supraspinous fossa of the scapula |
| Supraspinatus insertion | Greater tubercle of the humerus |
| Supraspinatus nerve | Suprascapular C4,5,6 |
| Subscapularis Action | -Medially rotate the shoulder
-Stabilize the head of humerus |
| Subscapularis Origin | Subscapular fossa of scapula |
| Subscapularis Insertion | Lesser tubercle of the humerus |
| Subscapularis Nerves | Upper and lower subscapular C5,6,7 |
| Trapezius Action | -Bilaterally: extend the head and neck
-Unilateraly: Laterally flex the h&n to the same side, Rotate the h&n to the opposite side, Elevate the scapula, Upwardly rotate the scapula |
| Trapezius Origin | External occipital protuberance, medial portion of superior nuchal line of the occiput, ligamentum nuchae and spinous processes of C-7 through T-12 |
| Trapezius Insertion | Lateral one-third of clavicle, acromion and spine of the scapula |
| Trapezius Nerve | Spinal portion of cranial nerve XI and ventral ramus C2,3,4 |
| Rhomboid major Action | -Adduct the scapula
-Elevate the scapula
-Downwardly rotate the scapula |
| Rhomboid major Origin | Spinous processes of T-2 to T-5 |
| Rhomboid Major Insertion | Medial border of the scapula between the spine of the scapula and inferior angle |
| Rhomboid Major Nerve | Dorsal scapular C4,5 |
| Rhomboid Minor Action | -Adduct the scapula
-Elevate the scapula
-Downwardly rotate the scapula |
| Rhomboid Minor Origin | Spinous processes of C-7 and T-1 |
| Rhomboid Minoir Insertion | Upper portion of medial border of the scapula, across from the spine of the scapula |
| Rhomboid Minor Nerve | Dorsal scapular C4,5 |
| Serratus Anterior Action | -Abduct the scapula
-Upwardly rotate the scapula
-Depress the scapula
-Hold the medial border of the scapula agaist the rib cage |
| Serratus Anterior Origin | -External surfaces of upper eight or nine ribs |
| Serratus Anterior Insertion | -Anterior surface of medial border of the scapula |
| Serratus Anterior Nerve | Long thoracic C5,6,7,8 |
| Levator Scapula Action | Unilateral:
-Elevate the scapula
-Downwardly rotate
-Laterally flex
-Rotate
Bilaterally:
Extend the head and neck |
| Levator Scapula Origin | Transverse process of first through fourth cervical vertebrae |
| Levator Scapula Insertion | Medial border of scapula, between superior angle and superior portion of spine of scapula |
| Levator Scapula of Nerve | Cervical 3,4, and Dorsal scapular C4,5 |
| Pectoralis Major Action | All fibers:
-Adduct the shoulder
-Medially rotate the shoulder
Upper fibers:
-Flex the shoulder
-Horizontally adduct the shoulder
Lower fibers:
-Extend the shoulder |
| Pectoralis Major Origin | Medial half of the clavcle,, sternum and cartilage of first through sixth ribs |
| Pectoralis Major Insertion | Crest of greater tubercle of humerus |
| Pectoralis Major Nerve | Upper fibers: Lateral pectoral C5,6,7
Lower fibers: Lateral and medial pectoral C6,7,8,T1 |
| Pectoralis Minor Action | -Depress the scapula
-Abduct the scapula
-Downwardly rotate the scapula |
| Pectoralis Minor Origin | Third, Fourth, and Fifth ribs |
| Pectoralis Minor Insertion | Medial surface of coracoid process of the scapula |
| Pectoralis Minor Nerve | Medial pectoral, with fibers from a communicating brance of the lateral pectoral C(6),7,8,T1 |
| Biceps Brachii Action | -Flex the elbow
-Supinate the forearm
-Flex the shoulder |
| Biceps Brachii Origin | Short head:
-Coracoid process of scapula
Long head:
-Supraglenoid tubercle of scapula |
| Biceps Brachii Insertion | Tuberosity of the radius and aponeurosis of the biceps brachii |
| Biceps Brachii Nerve | Musculocutatneous C5,6 |
| Triceps Brachii Action | All heads:
-Exend the elbow
Long head:
-Extend the shoulder
-Adduct the shoulder |
| Triceps Brachii Origin | Long Head: Infraglenoid tubercle of the scapula
Lateral head: Posterior surface of proximal half of the humerus
Medial Head: Posterior surface of distal half of the humerus |
| Triceps Brachii Insertion | Olecranon process of the ulna |
| Triceps Brachii | Radial C6,7,8,T1 |
