SHOULDER MOINA

Trapezius Origin

Occipital bone, ligamentum nuchae, C7, T1-T12

Trapezius Insertion

lateral third of clavicle, acromion and spine of scapula

Trapezius Innervation

Spinal accessory nerve

Trapezius Action

Elevates scapula, retracts scapula, moves scapula downward

Deltoid Origin

Lateral third of clavicle, acromion, spine of scapula

Deltoid Insertion

lateral surface of shaft of humerus

Deltoid Innervation

Axillary nerve

Deltoid action

Abducts arm, flex and medially rotate arm, extend and laterally rotate arm

Levator Scapulae Origin

C1-C4

Levator Scapulae Insertion

Medial border of scapula

Levator Scapulae Innervation

C3 and C4 and Dorsal Scapular Nerve

Levator Scapulae Action

Raises medial border of scapula

Rhomboid Minor Origin

Ligamentum nuchae and C7-T1

Rhomboid Minor Insertion

Medial border of scapula

Rhomboid Minor Innervation

Dorsal Scapular Nerve

Rhomboid Minor Action

Raises medial border of scapula upward and medially 

Rhomboid Major O

T2-T5

Rhomboid Major I

Medial border of scapula

Rhomboid Major N

Dorsal Scapular Nerve

Rhomboid Major A

Raises medial border of scapula upward and medially

Supraspinatus O

Supraspinous fossa of scapula 

Supraspinatus I

Greater tuberosity of humerus

Supraspinatus N

Suprascapular nerve

Supraspinatus A

Abducts arm and stabilizes shoulder joint

Infraspinatus O

Infraspinous fossa of scapula

Infraspinatus I

Greater tuberosity of humerus

Infraspinatus N

Suprascapular nerve

Infraspinatus A

Laterally rotates arm and stabilizes shoulder joint 

Teres Minor O

lateral border of scapula

Teres Minor I

Greater tuberosity of humerus

Teres Minor N

Axillary nerve

Teres Minor A

Laterally rotates arm and stabilizes shoulder joint

Teres Major O

lateral border of scapula 

Teres Major I

Medial lip of bicipital groove of humerus

Teres Major N

Lower subscapular nerve

Teres Major A

Medially rotates and adducts the arm and stabilizes shoulder joint

Pectoralis Major O

Anterior surface of the medial half of the clavicle, Anterior layer of rectus sheath

Pectoralis Major I

Crest of greater tubercle of humerus

Pectoralis Major N

Lateral and Medial Pectoral Nerves (C5-T1)

Pectoralis Major A

Shoulder adduction, Arm internal rotation, Arm flexion and extension

Pectoralis Minor O

Anterior surface of costal cartilage of ribs 3 to 5

Pectoralis Minor I

Medial border and coracoid process of scapula

Pectoralis Minor N

Medial and Lateral Pectoral nerves (C5 to T1)

Pectoralis Minor A

Draws scapula anteroinferiorly Stabilizes scapula on thoracic wall

Subclavius O

Costal cartilage of sternal end of rib 1

Subclavius I

Antero inferior surface of middle third of clavicle

Subclavius N

Subclavian nerve (C5 to C6)

Subclavius A

Anchors and depresses clavicle

Serratus Anterior O

Ribs 1 to 2, intercostal fascia; Ribs 3 to 6; Ribs 7-8/9

Serratus Anterior I

Anterior surface of superior scapular angle; Anterior surface of medial scapular border; Anterior surface of inferior angle and medial border of scapula

Serratus Anterior N

Long Thoracic Nerve (C5 to C7)

Serratus Anterior A

Draws scapula anterolaterally Suspends scapula on thoracic wall Rotates scapula

Subscapularis O

Subscapular fossa

Subscapularis I

Lesser tubercle of humerus

Subscapularis N

Upper and Lower Subscapular Nerves (C5, C6, C7)

Subscapularis A

Shoulder medial rotation

Latissimus dorsi O

T7-T12 Thorocolumbar facia, iliac crest, rib 3 and 4

Latissimus dorsi I

Floor of bicipital groove

Latissimus dorsi N

Thoracodorsal nerve (C6, C7, C8)

Latissimus dorsi A

Shoulder extension and adduction internal rotation

Biceps brachii O

LH: supraglenoid tubercle, SH: apex of coracoid process

Biceps brachii I

Radial tuberosity

Biceps brachii N

Musculocutaneous nerve (C5, C6)

Biceps brachii A

Shoulder flexion, elbow flexion and supination

Coracobrachialis O

Apex of coracoid process

Coracobrachialis I

Medial humerus

Coracobrachialis N

Musculocutaneous nerve (C5, C6)

Coracobrachialis A

Shoulder flexion

Brachialis O

Front of lower half of humerus

Brachialis I

Coronoid Process of ulna

Brachialis N

Musculocutaneous nerve

Brachialis A

Flexor of elbow joint

Triceps O

LO HEAD: Infraglenoid of scapula; ;LA HEAD: Upper half of posterior surface of shaft of the humerus; MED HEAD: Lower half of posterior surface of shaft of humerus

Triceps I

Olecranon process of ulna

Triceps N

Radial Nerve

Triceps A

Extends the arm