UL Muscle Attachments

Origin of Pectoralis major?

Medial half of clavicle, anterior surface of sternum, upper six costal cartilages, aponeurosis of external oblique muscle

Insertion of Pectoralis major?

Lateral lip of bicipital groove of humerus

Origin of Pectoralis minor?

3rd, 4th and 5th ribs near their costal cartilages

Insertion of Pectoralis minor?

Coracoid process of scapula

Origin of Subclavius?

1st rib and its costal cartilage

Insertion of Subclavius?

Inferior surface of middle third of clavicle

Origin of Serratus anterior?

Upper eight ribs

Insertion of Serratus anterior?

Anterior surface of medial border of scapula

Origin of Trapezius?

Occipital bone, ligamentum nuchae, spinous processes of C7

Insertion of Trapezius?

Lateral third of clavicle, acromion and spine of scapula

Origin of Latissimus dorsi?

Spinous processes of lower six thoracic vertebrae, lumbar and sacral vertebrae via thoracolumbar fascia, iliac crest, lower three or four ribs

Insertion of Latissimus dorsi?

Floor of bicipital groove of humerus

Origin of Levator scapulae?

Transverse processes of C1

Insertion of Levator scapulae?

Upper part of medial border of scapula

Origin of Rhomboid minor?

Ligamentum nuchae, spinous processes of C7 and T1 vertebrae

Insertion of Rhomboid minor?

Medial border of scapula opposite root of spine

Origin of Rhomboid major?

Spinous processes of T2

Insertion of Rhomboid major?

Medial border of scapula from spine to inferior angle

Origin of Deltoid?

Lateral third of clavicle, acromion and spine of scapula

Insertion of Deltoid?

Deltoid tuberosity of humerus

Origin of Supraspinatus?

Supraspinous fossa of scapula

Insertion of Supraspinatus?

Upper facet of greater tuberosity of humerus

Origin of Infraspinatus?

Infraspinous fossa of scapula

Insertion of Infraspinatus?

Middle facet of greater tuberosity of humerus

Origin of Teres major?

Lower part of lateral border and inferior angle of scapula

Insertion of Teres major?

Medial lip of bicipital groove of humerus

Origin of Teres minor?

Upper two

Insertion of Teres minor?

Lower facet of greater tuberosity of humerus

Origin of Subscapularis?

Subscapular fossa of scapula

Insertion of Subscapularis?

Lesser tuberosity of humerus

Origin of Biceps brachii?

Long head: supraglenoid tubercle of scapula, short head: coracoid process of scapula

Insertion of Biceps brachii?

Posterior part of radial tuberosity

Origin of Coracobrachialis?

Coracoid process of scapula

Insertion of Coracobrachialis?

Middle of medial surface of humerus

Origin of Brachialis?

Anterior surface of lower half of humerus

Insertion of Brachialis?

Coronoid process and tuberosity of ulna

Origin of Triceps brachii?

Long head: infraglenoid tubercle of scapula, lateral head: posterior surface of humerus above radial groove, medial head: posterior surface of humerus below radial groove

Insertion of Triceps brachii?

Olecranon process of ulna

Origin of Pronator teres?

Medial epicondyle of humerus and coronoid process of ulna

Insertion of Pronator teres?

Lateral surface of shaft of radius

Origin of Flexor carpi radialis?

Medial epicondyle of humerus

Insertion of Flexor carpi radialis?

Bases of 2nd and 3rd metacarpals

Origin of Palmaris longus?

Medial epicondyle of humerus

Insertion of Palmaris longus?

Flexor retinaculum and palmar aponeurosis

Origin of Flexor carpi ulnaris?

Medial epicondyle of humerus, olecranon and posterior border of ulna

Insertion of Flexor carpi ulnaris?

Pisiform, hook of hamate and base of 5th metacarpal

Origin of Flexor digitorum superficialis?

Humeroulnar head: medial epicondyle of humerus and coronoid process of ulna, radial head: anterior border of radius

Insertion of Flexor digitorum superficialis?

Sides of middle phalanges of medial four fingers

Origin of Flexor pollicis longus?

Anterior surface of radius and interosseous membrane

Insertion of Flexor pollicis longus?

Base of distal phalanx of thumb

Origin of Flexor digitorum profundus?

Upper three

Insertion of Flexor digitorum profundus?

Bases of distal phalanges of medial four fingers

Origin of Pronator quadratus?

Distal one

Insertion of Pronator quadratus?

Distal one

Origin of Brachioradialis?

Upper two

Insertion of Brachioradialis?

Lateral surface of distal end of radius above styloid process

Origin of Extensor carpi radialis longus?

Lower one

Insertion of Extensor carpi radialis longus?

Base of 2nd metacarpal

Origin of Extensor carpi radialis brevis?

Lateral epicondyle of humerus

Insertion of Extensor carpi radialis brevis?

Base of 3rd metacarpal

Origin of Extensor digitorum?

Lateral epicondyle of humerus

Insertion of Extensor digitorum?

Extensor expansions of medial four fingers

Origin of Extensor digiti minimi?

Lateral epicondyle of humerus

Insertion of Extensor digiti minimi?

Extensor expansion of little finger

Origin of Extensor carpi ulnaris?

Lateral epicondyle of humerus and posterior border of ulna

Insertion of Extensor carpi ulnaris?

Base of 5th metacarpal

Origin of Anconeus?

Lateral epicondyle of humerus

Insertion of Anconeus?

Lateral surface of olecranon and upper posterior surface of ulna

Origin of Supinator?

Lateral epicondyle of humerus, radial collateral and annular ligaments, supinator crest of ulna

Insertion of Supinator?

Upper one

Origin of Abductor pollicis longus?

Posterior surfaces of ulna and radius and interosseous membrane

Insertion of Abductor pollicis longus?

Base of 1st metacarpal

Origin of Extensor pollicis brevis?

Posterior surface of radius and interosseous membrane

Insertion of Extensor pollicis brevis?

Base of proximal phalanx of thumb

Origin of Extensor pollicis longus?

Posterior surface of ulna and interosseous membrane

Insertion of Extensor pollicis longus?

Base of distal phalanx of thumb

Origin of Extensor indicis?

Posterior surface of ulna and interosseous membrane

Insertion of Extensor indicis?

Extensor expansion of index finger

Origin of Palmaris brevis?

Medial border of palmar aponeurosis and flexor retinaculum

Insertion of Palmaris brevis?

Skin on medial border of hand

Origin of Lumbricals?

Tendons of flexor digitorum profundus

Insertion of Lumbricals?

Extensor expansions of medial four fingers

Origin of Palmar interossei?

Palmar surfaces of 2nd, 4th and 5th metacarpals

Insertion of Palmar interossei?

Bases of proximal phalanges and extensor expansions of 2nd, 4th and 5th fingers

Origin of Dorsal interossei?

Adjacent sides of metacarpals

Insertion of Dorsal interossei?

Bases of proximal phalanges and extensor expansions of 2nd, 3rd and 4th fingers

Origin of Abductor pollicis brevis?

Flexor retinaculum, scaphoid and trapezium

Insertion of Abductor pollicis brevis?

Lateral side of base of proximal phalanx of thumb

Origin of Flexor pollicis brevis?

Flexor retinaculum and trapezium

Insertion of Flexor pollicis brevis?

Lateral side of base of proximal phalanx of thumb

Origin of Opponens pollicis?

Flexor retinaculum and trapezium

Insertion of Opponens pollicis?

Lateral border of 1st metacarpal

Origin of Adductor pollicis?

Oblique head: capitate and bases of 2nd and 3rd metacarpals, transverse head: anterior surface of shaft of 3rd metacarpal

Insertion of Adductor pollicis?

Medial side of base of proximal phalanx of thumb

Origin of Abductor digiti minimi?

Pisiform bone

Insertion of Abductor digiti minimi?

Medial side of base of proximal phalanx of little finger

Origin of Flexor digiti minimi?

Hook of hamate and flexor retinaculum

Insertion of Flexor digiti minimi?

Base of proximal phalanx of little finger

Origin of Opponens digiti minimi?

Hook of hamate and flexor retinaculum

Insertion of Opponens digiti minimi?

Medial border of 5th metacarpal