I of Pectoralis major
Greater tubercule and lateral lip of intertubercular groove of humerus
O clavicular head of Pectoralis Major m.
Medial clavicle
O of sternal head of Pectoralis major m.
Sternum and costal cartilages of ribs 2-6
Action of Pectoralis major m.
Flexion, Medial rotation and adduction of humerus
Innervation of Pectoralis major m.
Medial and lateral pectoral n.
O of Pectoralis minor m.
Ribs 2-5 (sometimes 3-5 or 2-4) near their costal cartilages
I of Pectoralis minor m.
Coracoid process of Scapula
Action of Pectoralis minor m.
Abduction, downward rotations of scapula & assists in elevation of ribs when pectoral girdle is fixed
Innervation of Pectoralis minor m.
Medial pectoral n.
O of Subclavius m.
1st rib
I of Subclavius m.
Subclavian groove of Clavicle
Action of Subclavius m.
Depress clavicle
Innervation of subclavius m.
Subclavian n.
O of Serratus anterior m.
Ribs 1-8 (sometimes 1-9)
I of Serratus anterior m.
Medial border & inferior angle of scapula
Action of Serratus anterior m.
Abduction & upward rotation of Scapula (protraction)
Innervation of Serratus anterior m.
Long thoracic n.
O of Serratus posterior superior m.
Ligament nuchea & spinous processes of C7-T3 vertebrae
I of Serratus posterior superior m.
Superior border of ribs 2 to 4
Action of Serratus posterior superior m.
Elevation of ribs
Innervation of Serratus posterior superior m.
2-5 intercostal n.
O of Serratus posterior inferior m.
Spinous processes of T11-L12 vertebrae
I of Serratus posterior inferior m.
Inferior borders of ribs 8-12 near their angles
Action of Serratus posterior inferior m.
Depression of ribs
Innervation of Serratus posterior inferior m.
9-12 thoracic n.
O of Trapezius m.
Occipital bone, ligamentum nuchea & spinous processes of C7-T12
I of Trapezius m.
Lateral 1/3 of clavicle, spine and acromion of scapula
Action of superior fibers of Trapezius m.
Upward rotation of scapula, can also extend head
Action of middle fibers of Trapezius m.
Adduction of scapula (retraction)
Action of inferior fibers of Trapezius m.
Depression & upward rotation of scapula
Innervation of Trapezius m.
Accessory n. (CN XI) and cervical spinal n. C3-C5
O of Latissimus dorsi m.
Spinous processes of T7-L5, Sacral crest, iliac crest and inferior 4 ribs
I of Latissimus dorsi m.
Floor of intertubercular groove of humerus b.
Action of Latissimus dorsi m.
Extension, adduction and medial rotation of humerus
Innervation of Latissimus dorsi m.
Thoracodorsal n.
O of Levator scapulae m.
Transverse processes of C1-C4
I of Levator scapulae m.
Upper 1/3 of medial border of scapulae
Action of Levator scapulae m.
Elevation & Downward rotation of the scapula
Innervation of Levator Scapulae m.
Dorsal scapular n. and cervical n. C3-C5
O of Rhomboid major m.
Spinous process of T2-T5
I of Rhomboid major m.
Lower 1/3 of medial border of scapula
Action of Rhomboid major m.
Elevation, adduction & downward rotation of scapula; stabilizes scapula
Innervation of Rhomboid major m.
Dorsal scapular n.
O of Rhomboid minor m.
Spinous processes of C7-T1
I of Rhomboid minor m.
Medial border of scapula superior to spine
Action of Rhomboid minor m.
Elevation, adduction & downward rotation of scapula; stabilizes scapula
Innervation of Rhomboid minor m.
Dorsal scapular n.
O of Deltoid m.
Lateral 1/3 of clavicle, acromion and spine of scapula
I of Deltoid m.
Deltoid tuberosity of humerus
Action of anterior fibers of Deltoid m.
Flexion & medial rotation of humerus
Action of lateral fibers of Deltoid m.
Adbuction of humerus
Action of posterior fibers of Deltoid m.
Extension & lateral rotation of humerus
Innervation of Deltoid m.
Axillary n.
O of Surpraspinatus m.
Supraspinous fossa of scapula
I of Supraspinatus m.
Greater tubercule of humerus
Action of Supraspinatus m.
Assists deltoid m. in abduction of humerus at shoulder jnt
Innervation of Supraspinatus m.
Suprascapular n.
O of Infraspinatus m.
Infraspinous fossa of scapula
I of Infraspinatus m.
Greater tubercule of humerus
Action of Infraspinatus m.
Lateral rotation of humerus at shoulder jnt.
Innervation of Infraspinatus m.
Suprascapular n.
O of Teres minor m.
Inferior lateral border of scapula
I of Teres minor m.
Greater tubercule of Humerus
Action of Teres minor m.
Lateral rotation of humerus at shoulder jnt
Innervation of Teres minor m.
Axillary n.
O of Teres major m.
Inferior angle of Scapula
I of Teres major m.
Medial lip of intertubercular groove of Humerus
Action of Teres major m.
Extends and assists in adduction & medial rotation of humerus at shoulder jnt.
Innervation of Teres major m.
Lower subscapular n.
O of Subscapularis m.
Subscapular fossa of scapula
I of Subscapularis m.
Lesser tubercle of humerus
Action of Subscapularis m.
Medial rotation of Humerus at shoulder jnt
Innervation of Subscapularis m.
Upper & Lower subscapular n.
Rotator cuff muscles
Supraspinatus m. ; Infraspinatus m. ; Teres minor m. ; Subscapularis m.
O of the long head of Biceps brachii m.
Supraglenoid tubercle of scapula
I of Biceps brachii m.
Radial tuberosity of radius & deep fascia of forearm via bicipital aponeuroseus
Action of Biceps brachii m.
Flexion of forearm at elbow jnt., supination of the forearm at radio-ulnar jnt., flexion of humerus at shoulder jnt.
Innervation of Biceps brachii m.
Musculocutaneous n.
O of the short head of Biceps brachii m.
Coracoid process of the scapula
O of Brachialis m.
Distal anterior surface of humerus
I of Brachialis m.
Ulnar tuberosity and corocoid process of ulna
Action of Brachialis m.
Flexion of forearm at elbow jnt
Innervation of Brachialis m.
Musculocutenous n. & radial n.
O of Coracobrachialis m.
Coracoid process of scapula
I of Coracobrachialis m.
Middle 1/3 of medial surface of shaft of humerus
Action of Coracobrachialis m.
Flexion & adduction of humerus at shoulder jnt.
Innervation of COracobrachialis m.
Musculocutaneous n.
O of long head of Triceps Brachii m.
Infraglenoid tubercle of scapula
O of lateral head of Triceps Brachii m.
Lateral and posterior surface of humerus, above radial groove
O of medial head of Tricpes Brachii m.
Posterior surface of humerus, below radial groove
I of Triceps brachii m.
Olecranon process of ulna
Action of Triceps Brachii m.
Extension of humerus at shoulder jnt, & extension of forearm at elbow jnt.
Innervation of Triceps brachii m.
Radial n.
