Muscle - origin, insertion, action

Coracobrachialis - origin

Coracoid process of scapula

Trapezius - upper - action

Elevation Lateral (upward) rotation of scapula

Levator scapula - action

Elevation Medial (downward) rotation of scapula

Deltoid - posterior - action

Extension Horizontal abduction Lateral rotation Scaption of humerus

Coracobrachialis - action

Flexion Adduction of humerus

Subscapularis - origin

Subscapular fossa of scapula

2 Forearm extensors

Triceps Brachii Anconeus

Rhomboid major - action

Adduction (retraction) Medial (downward) rotation of scapula

Rhomboid major - insertion

Adduction (retraction) Medial (downward) rotation of scapula

Rhomboid minor - action

Adduction (retraction) Medial (downward) rotation of scapula

Trapezius - middle - action

Adduction (retraction) of scapula

Latissimus Dorsi - action

Extension Medial rotation Adduction of humerus Medial (downward) rotation of scapula Assists depression of scapula

Triceps Brachii - action

Extension of elbow Long head - extension of humerus

Brachioradialis - insertion

Styloid process of radius

Brachialis - insertion

Tuberosity of ulna Coronoid process of ulna

Subclavius - origin

1st rib costocartilage junction

Supraspinatus - action

Abduction Scaption of humerus Stabilization of head of humerus

Deltoid - middle - action

Abduction of humerus to 90 degrees

Deltoid - middle - origin

Acromion of scapula - lateral surface

Pectoralis Major - origin

Clavicular head: medial 1/2 of clavicle Sternocostal head: sternum cartilages of upper 6 ribs aponeurosis of external oblique muscle

Brachialis - action

Flexion of elbow

Teres Major - origin

Inferior angle of scapula (dorsal surface) Lower 1/3 of lateral border of scapula

Anconeus - origin

Lateral epicondyle of humerus

Pectoralis major - insertion

Lateral lip of bicipital (intertubercular) groove of humerus

Infraspinatus - action

Lateral rotation Extension of humerus

Subscapularis - insertion

Lesser tubercle of humerus

Triceps Brachii - origin

Long head - infraglenoid tubercle of scapula Lateral head - posterior humerus above spiral groove Medial head - posterior humerus below spiral groove

Teres Major - insertion

Medial lip of bicipital groove of humerus

Rhomboid major - origin

T2-T5 spinous processes

Latissimus Dorsi - origin

Thoracolumbar aponeurosis Lower 6 thoracic spinous processes Lower 3-4 ribs Inferior angle of scapula

7 Shoulder girdle muscles

Trapezius Rhomboids (major & minor) Levator scapula Serratus anterior Pectoralis minor Subclavius

Biceps Brachii - insertion

Tuberosity of radius Bicipital aponeurosis

Serratus anterior - insertion

Vertebral (medial) border of scapula (anterior surface of scapula)

Levator scapula - insertion

Vertebral (medial) border of scapula from superior angle to root of spine

Pectoralis minor - action

Abduction (protraction) Depression Medial (downward) rotation Anterior tilt of scapula Assists forced inhalation

Serratus anterior - action

Abduction (protraction) Lateral (upward) rotation of scapula Stabilizes scapula against chest wall Depression of scapula (lower fibers) Assists forced exhalation

Levator scapula - origin

C1-C4 transverse processes

Deltoids - insertion

Deltoid tuberosity of humerus

5 Gleno-Humeral muscles

Pectoralis major Deltoid Coracobrachialis Teres major Latissimus dorsi

Deltoid - posterior - origin

Spine of scapula

Anconeus - action

Assists extension of elbow..

Pectoralis minor - insertion

Coracoid process of scapula (medial border of superior surface)

Teres Major - action

Extension Medial rotation Adduction of humerus

Trapezius - upper - origin

External occipital protuberance Ligamentum nuchae

Deltoid - anterior - action

Flexion Horizontal adduction Medial rotation of humerus

Biceps Brachii - action

Flexion of elbow Supination of forearm Short head - flexion of humerus

Brachioradialis - action

Flexion of elbow w/forearm in mid-position (1/2 way between supination and pronation)

Infraspinatus - origin

Infraspinatus fossa of scapula

Teres minor - action

Lateral rotation Extension of humerus

Brachioradialis - origin

Lateral supracondylar ridge of humerus

Anconeus - insertion

Olecranon process and upper posterior surface of ulna

Teresa minor - origin

Upper 1/3 of axillary (lateral) border of scapula

Pectoralis major - action

Adduction Horizontal adduction Medial rotation of humerus Clavicular head: flexion of humerus Sternocostal head: extension of humerus assists in anterior tilt of scapula

Pectoralis minor - origin

Anterior surface of ribs 3-5 near costal cartilages

4 Forearm Flexors

Biceps Brachii Brachialis Brachioradialis Pronator Teres

Latissimus Dorsi - insertion

Bicipital groove of humerus

Rhomboid minor - origin

C7 and T1 spinous processes

Trapezius - middle - origin

C7-T3 spinous processes

Subclavius - action

Depresses clavicle Stabilizes sternoclavicular joint

Trapezius - lower - action

Depression Lateral (upward) rotation of scapula

Teres minor - insertion

Greater tubercle of humerus (inferior facet)

Infraspinatus - insertion

Greater tubercle of humerus (middle facet)

Supraspinatus - insertion

Greater tubercle of humerus (superior facet)

Pronator Teres - origin

Humeral head - medial epicondyle of humerus Ulnar head - coronoid process of ulna

Subclavius - insertion

Inferior shaft of clavicle - middle 1/3

4 Rotator cuff muscles

Infraspinatus Supraspinatus Subscapularis Teres minor

Deltoid - anterior - origin

Lateral 1/3 of clavicle

Trapezius - upper - insertion

Lateral 1/3 of clavicle Acromion of scapula

Serratus anterior - origin

Lateral surface of upper 8 ribs (by finger like slips)

Brachialis - origin

Lower 1/2 of anterior shaft of humerus

Subscapularis - action

Medial rotation Adduction of humerus

Coracobrachialis - insertion

Middle 1/3 of medial surface of humeral shaft

Pronator Teres - insertion

Middle of lateral shaft of radius

Triceps Brachii - insertion

Olecranon process of ulna

Pronator Teres - action

Pronation of forearm Assists in flexion of elbow

Rhomboid minor - insertion

Root of spine of scapula

Trapezius - lower - insertion

Root of spine of scapula

Biceps Brachii - origin

Short head - coracoid process of scapula Long head - supraglenoid tubercle of scapula

Trapezius - middle - insertion

Spine of scapula

Supraspinatus - origin

Supraspinatus fossa or scapula

Trapezius - lower - origin

T4-T12 spinous processes