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Muscles Upper Limb
Chest and arm
| Question | Answer |
|---|---|
| O. of Pectoralis Major | Clavicular head: medial half of clavicle. Sternal head: sternum, carilages of upper 6 ribs. |
| I. of Pectoralis Major | Lateral lip of bicipital groove of humerus |
| A. of Pectoralis Major | Adduction, horizontal adduction and medial rotation of humberus. Clavicular head: flexion of humerus. Sternal Head: extension of humerus from a flexed position |
| N. of Pectoralis Major | Clavicular Head: lateral pectoral n. Sternal Head: medial pectoral n. |
| O. of Pectoralis Minor | Anterior surface of ribs 3,4,5 near costal cartilage |
| I. of Pectoralis Minor | Coracoid Process of scapula on medial border of superior surface |
| A. of Pectoralis Minor | Protraction, depression, downward rotation of the scapula |
| N. of Pectoralis Minor | Medial Pectoral n. |
| O. of Subclavius | 1st rib costocartilage junction |
| I. of Subclavius | Inferior shaft of clavicle- middle 1/3 |
| A. of Subclavius | Stabilizes clavicle by moving it medially |
| N. of Subclavius | Nerve to Subclavius |
| O. of Serratus Anterior | Outer surface of upper 8 ribs (by finger-like slips) |
| I. of Serratus Anterior | Vertebral border of the scapula- anterior surface |
| A. of Serratus Anterior | Protraction, upward rotation of scapula, stabilizes scapula against chest wall |
| N. of Serratus Anterior | Long Thoracic n. |
| O. of Coracobrachialis | Coracoid process of scapula |
| I. of Coracobrachialis | Middle 1/3 of medial surface of humeral shaft |
| A. of Coracobrachialis | Flexion, adduction of humerus |
| N. of Coracobrachialis | Musculocutaneous n. |
| O. of Deltoids | Anterior: lateral third of clavicle. Middle: lateral acromion. Posterior: spine of scapula |
| I. of Deltoids | Deltoid tuberosity of humerus |
| A. of Deltoids | Anterior: flexion, horizontal adduction, medial rotation of humerus. Middle: abduction of humerus to 90 degrees. Posterior: extension, horizontal abduction, lateral rotation of humerus. |
| N. of Deltoids | Axillary n. |
| O. of Triceps Brachii | Long Head: Infraglenoid tubercle of scapula. Lateral Head: Posterior humerus above the spiral groove. Medial head: posterior humerus below the spiral groove. |
| I. of Triceps Brachii | Olecranon process of ulna |
| A. of Triceps Brachii | Extension of elbow. Long Head: extension of humerus |
| N. of Triceps Brachii | Radial n. |
| O. of Anconeus | Lateral epicondyle of humerus |
| I. of Anconeus | Olecranon process and upper posterior surface of ulna |
| A. of Anconeus | Assists extension of elbow |
| N. of Anconeus | Radial n. |
| O. of Brachialis | Lower half of anterior shaft of humerus |
| I. of Brachialis | Tuberosity of ulna, Coronoid process of ulna. |
| A. of Brachialis | Flexion of elbow |
| N. of Brachialis | Musculocutaneous n. (sometimes branches of radial and median nn.) |
| O. of Biceps Brachii | Short head: coracoid process of scapula. Long head: Supraglenoid tubercle of scapula |
| I. of Biceps Brachii | Tuberosity of radius, bicipital aponeurosis |
| A. of Biceps Brachii | Flexion of elbow, supination of forearm. Short head: flexion of humerus |
Created by:
coyne44
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