Name.

Position.

Origin.

Insertion.

Action.

Nerve Supply.

Latissimus

dorsi.

Lumbar and lower part of dorsal regions.

Crest of ilium, sacral, lumbar, and six lower dorsal spines, lower angle scapula, supra-spinous ligament. Three or four lower ribs.

Lower part inner ridge of bicipital groove of humerus.

Draws elevated arm back and obliquely down, raises body to arms, extends and rotates arm inwards.

Long sub-scapularis.

Pectoralis

major.

Front of upper part of chest and axilla.

Sternum clavicle, seven upper costal cartilages.

Outer ridge bicipital groove of humerus.

Draws arm forwards and upwards, raises body to arms.

External anterior thoracic.

Supra-

spinatus.

Upper part of back of scapula.

Fossa above spine of scapula.

Great tuberosity of humerus (upper facet).

Great tuberosity of humerus (middle facet).

Assists deltoid in raising arm, rotates outwards.

Suprascapular.

Infra-spinatus.

Lower part of back of scapula.

Fossa below spine of scapula.

Rotates humerus outwards.

Suprascapular.

Teres minor.

Dorsal surface of upper part of axillary border of scapula.

Axillary border of scapula.

Great tuberosity of humerus (lower facet).

Rotates humerus outwards.

Circumflex.

Teres major.

Dorsal aspect of inferior angle of scapula.

Inferior angle of scapula.

Inner ridge of bicipital groove.

Assists latissimus dorsi in drawing humerus down and back, rotates inwards.

Subscapular.

Subscapularis.

Fills subscapular fossa.

Anterior aspect of scapula.

Lesser tuberosity of humerus.

Rotates humerus inwards.

Subscapular.

Deltoid.

Covers shoulder-joint and extends to middle of outer side of humerus.

Outer third of clavicle. Outer edge acromion process. Lower border of spine of scapula.

Deltoid impression on outer side of shaft of humerus.

Raises arm, draws it back by posterior fibres, and forward by anterior fibres.

Circumflex.

Coraco-brachialis.

Upper and inner part of arm.

Coracoid process of scapula.

inner side of shaft of humerus, about the middle.

Raises arm obliquely, & draws it to the side.

Musculocutaneous.

Biceps brachii, two heads.

Whole of anterior surface of humerus.

(1) Apex of glenoid cavity. (2) Coracoid process of scapula.

Tuberosity of radius.

Flexes and supinates forearm.

Musculocutaneous

Brachialis

anticus.

Lower half of front of humerus and elbow joint.

By forked head each side of deltoid and lower half shaft of humerus.

Coronoid process of ulna.

Flexes forearm.

Musculo cutaneous. Musculo-spiral.

Triceps brachii, three heads.

Covers back of humerus.

(1) Lower part glenoid cavity. (2) Middle of humerus above musculo-spiral groove. (3) Below musculo - spiral groove.

Olecranon process of ulna.

Extends forearm.

Musculo-spiral.

Anconeus.

Back of elbow-joint.

Back of external condyle of humerus.

Olecranon process and upper part of shaft of ulna.

Assists triceps to extend forearm.

Musculo-spiral.

Pronator radii teres, two heads.

Obliquely across front of elbow-joint.

(1) Inner condyle of humerus. (2) Coronoid process of ulna.

Middle of outer surface of radius.

Pronates hand.

Median.

Flexor carpi radialis.

Inner side of pronator radii teres.

Inner condyle of humerus.

Palmar surface, first and second metacarpal bones.

Flexes wrist. Draws hand to radial side.

Median.

Pal maris

longus.

On inner side of flexor carpi radialis.

Inner condyle of humerus. Fascia of forearm.

Ligament. Palmar fascia.

Flexes wrist. Makes tense palmar fascia.

Median.

Flexor carpi ulnaris.

Ulnar side of forearm.

Inner condyle of humerus. Inner side of olecranon. Back of ulna.

Pisiform and unciform bones. Fifth metacarpal bone.

Flexes hand and draws it to ulnar side.

Ulnar.

Flexor

sublimus digitorum.

Under preceding muscles on front of forearm.

Inner condyle of humerus. Internal lateral ligament of elbow. Anterior border of radius.

By four tendons into front of second phalanges.

Flexes fingers from second phalanx, also flexes wrist and elbow.

Median.

Flexor

profundus digitorum.

Ulnar side of forearm, under superficial flexors.

Upper three-fourths of shaft of ulna.

By four tendons into front of third phalanges.

Flexes third phalanx, also flexes wrist.

Ulnar. Anterior interosseous.

Flexor longus pollices.

Radial side of forearm.

Anterior surface of shaft of radius.

Last phalanx of thumb.

Flexes thumb.

Anteriorinterosseous.

Pronator

quadratus.

Across lower end of front of radius and ulna.

Lower fourth of ulna, anterior surface.

Lower fourth of radius,

Pronates hand.

Anteriorinterosseous.

Supinator

longus.

Radial side of forearm.

Ridge above external condyle of humerus.

Close to styloid process of radius.

Supinates and flexes forearm.

Musculo-

spiral.

Extensor carpi radialis longus.

Partly beneath supinator longus.

Ridge above external condyle of humerus.

Radial side of metacarpal bone of index-finger.

Extends wrist. Flexes elbow.

Musculo-

spiral

Extensor carpi radialis brevis.

Beneath extensor carpi radialis longus.

External condyle of humerus.

Radial side of meta -carpal bone of middle finger.

Extends wrist. Flexes elbow.

Posterior interosseous.

Extensor communis digitorum.

Back of forearm.

External condyle of humerus.

Back of last two phalanges of four inner fingers.

Extends fingers.

Posterior interosseous.

Extensor minimi digiti.

Inner side of extensor communis digitorum.

External condyle of humerus.

Back of first phalanx of little finger.

Extends little finger.

Posterior interosseous.

Extensor carpi ulnaris.

Ulnar side of forearm.

External condyle of humerus.

Back of base of metacarpal bone of little finger.

Extends wrist.

Posterior interosseous.

Supinator radii brevis.

Upper third of radius.

Depression below lesser sigmoid cavity. External and orbicularis ligaments of elbow.

Outer edge of bicipital tuberosity and upper part of shaft of radius.

Supinates hand.

Posterior interosseous.

Extensorossis metacarpi pollicis.

Immediately below supinator brevis.

Posterior surface of middle of radius and ulna.

Radial side of base of first metacarpal.

Extends and abducts thumb.

Posterior interosseous.

Extensor primi internodii pollicis.

Inner side of extensorossis meta-carpi pollicis.

Radius below preceding muscle.

Base of first phalanx of thumb, at back.

Extends and abducts thumb.

Posterior interosseous.

Extensor secundi internodii pollicis.

Inner side of extensor primi internodii pollicis..

Middle of ulna. Interosseous membrane.

Base of second phalanx of thumb at back.

Extends and abducts thumb.

Posterior interosseous.

Extensor indicis proprius.

Inner side of last muscle.

Middle of ulna. Interosseous membrane.

Back of first phalanx of index-finger.

Points index-finger.

Posterior interosseous.

Abductor

pollicis.

Immediately beneath the skin in front of thumb.

Annular ligament. Trapezium.

Base of first phalanx of thumb, outer side.

Draws thumb from fingers.

Median.

Opponens

pollicis.

Beneath abductor pollicis.

Annular ligament. Trapezium.

Whole length of first metacarpal.

Flexes thumb and draws it across fingers.

Median.

Flexor brevis pollicis.

On inner side of opponens.

Annular ligament. Second row of carpal bones.

Outer side of base first phalanx of thumb.

Flexes thumb and draws it across fingers.

Median.

Adductor pollicis obliquus.

Under flexor brevis pollicis.

Bases of second and third metacarpal bones and first three carpal, second row.

Inner side of first phalanx of thumb.

Draws thumb to fingers, as in pinching.

Ulnar, deep branch.

Adductor

transversus pollicis.

Beneath foregoing muscles.

Lower two-thirds of metacarpal bone of middle finger, palmar surface.

Ulnar side of base of first phalanx of thumb.

Draws thumb to fingers.

Ulnar.

Palmaris

brevis.

Under skin on ulnar side of hand.

Palmar fascia.

Skin of inner border of palm.

Wrinkles skin of palm.

Ulnar.

Abductor minimi digiti.

Ulnar border of palm.

Pisiform. Fifth metacarpal.

Ulnar side of first phalanx of little finger.

Draws little finger from ring-finger.

Ulnar, deep branch.

Flexor bevis minimi digiti

Ulnar border of palm.

Annular ligament. Unciform bone.

Ulnar side of first phalanx of little finger.

Flexes little finger.

Ulnar, deep branch.

Opponens minimi digiti.

Ulnar border of palm.

Annular ligament. Unciform bone.

Whole length of metacarpal bone of little finger.

Flexes little finger and deepens palm.

Ulnar, deep branch.

Lumbricales, four in number.

In palm between deep tendons.

Tendons of flexor profundus digitorum.

Into tendons of extensor communis digitorum on dorsal aspect of fingers.

Bases of phalanges and extensor tendons.

Assist in quick, short movements. Flexes first phalanx, extends others.

Median. Ulnar.

Dorsal interossei, four in number.

Between metacarpal bones.

Sides of metacarpal bones by two heads.

Abducts fingers from middle line. Flexes first phalanges, extends second and third.

Ulnar, deep branch.

Palmarinterossei, three in number.

Palmar surface of metacarpal bones.

Sides of metacarpal bones.

Bases of first phalanges and extensor tendons.

Adducts to middle line. Flexes first phalanges, extends second and third.

Ulnar, deep branch.