Myology Of The Superior Limb

Front 1

Supraspinatus muscle

Back 1

O: supraspinous fossa of scapula.
I: greater tubercle of humerus.
A: abduct limb at shoulder jt.

Front 2

Infrasspinatus muscle

Back 2

O: infraspinous fossa of scapula.
I: greater tubercle of humerus.
A: extend shoulder jt., rotate brachium laterally.

Front 3

Teres minor muscle

Back 3

O: lateral border of scapula.
I. greater tubercle of humerus.
A: adduct limb at shoulder jt., rotate brachium laterally.

Front 4

Teres major muscle

Back 4

O: inferior angle of scapula.
I: medial border of the intertubercular groove of humerus.
A: extend shoulder jt., adduct limb at shoulder jt., rotate brachium medially.

Front 5

Subscapularis muscle

Back 5

O: subscapular fossa.
I: lesser tubercle of humerus.
A. rotate brachium medially.

Front 6

Deltoideus muscle

Back 6

O: Acromial extremity of clavicle, acromion and spine of scapula.
I: deltoid tuberosity of humerus.
A: flex and extend shoulder jt., rotate brachium, abduct limb at shoulder jt.

Front 7

Coracobrachialis muscle

Back 7

O: coracoid process of scapula.
I: medial border of humerus.
A: flex shoulder jt., adduct limb at shoulder jt.

Front 8

Biceps brachii muscle

Back 8

O: long head- neck of scapula, short head- coracoid process of scapula.
I: tuberosity of radius.
A. flex elbow jt., flex shoulder jt., supinate antebrachium.

Front 9

Brachialis muscle

Back 9

O: anterior border of humerus.
I: coronoid process of ulna.
A: flex elbow jt.

Front 10

Brachioradialis muscle

Back 10

O: lateral supracondylar crest of humerus.
I: base of styloid process of radius.
A: flex elbow jt., supinate antebrachium, pronate antebrachium.

Front 11

Triceps brachii muscle

Back 11

O: long head- lateral border of scapula, lateral head- lateral and posterior aspects of humerus., medial head- medial and posterior aspects of humerus. medial head- medial and posterior aspects of humerus.
I: olecranon of ulna.
A: extend elbow jt., extend shoulder jt., adduct limb at shoulder joint.

Front 12

Anconeus muscle

Back 12

O: lateral epicondyle of humerus.
I: olecranon of ulna.
A: extend cubital joint.

Front 13

Flexor carpi radialis muscle

Back 13

O: medial epicondyle of humerus.
I: anterior aspect of bases of 2nd and 3rd metacarpal bones.
A: flex carpal jt., abduct manus at carpal jt.

Front 14

Palmaris longus muscle

Back 14

O: medial epicondyle of humerus.
I: flexor retinaculum, carpal ligament, and palmar aponeurosis.
A: flex carpal joint.

Front 15

Superficial digital flexor muscle

Back 15

O: medial epicondyle of humerus, coronoid process of ulna, proximal aspect of radius.
I: middle phalanges of digits 2,3,4 and 5.
A: flex carpal jt., metacarpophalangeal jt's., proximal interphalangeal jt's.

Front 16

Deep digital flexor muscle

Back 16

O: proximal aspect of ulna.
I: separate tendons to the base of the distal phalanges of digits 2,3,4 and 5.
A: flex carpal jt, and digital joints.

Front 17

Flexor pollicis longus muscle

Back 17

O: anterior aspect of radial body.
I: distal phalanx of pollex.
A: flex digital joints of pollex.

Front 18

Flexor carpi ulnaris muscle

Back 18

O: medial epicondyle of humerus, olecranon and body of ulna.
I: pisiform bone, hamulus of hamate bone, base of 5th metacarpal bone.
A: flex carpal jt, adduct manus at carpal jt.

Front 19

Pronator teres muscle

Back 19

O: medial epicondyle of humerus and medial side of coronoid process of ulna.
I: lateral side of the middle aspect of body of radius.
A: pronate the manus.

Front 20

Pronator quadratus muscle

Back 20

O: distal, anterior aspect of the body of ulna.
I: distal, anterior aspect of body of radius.
A: pronate the manus.

Front 21

Supinator muscle

Back 21

O: lateral epicondyle of humerus.
I: body of radius.
A: supinate the manus.

Front 22

Extensor carpi radialis longus muscle

Back 22

O: lateral supracondylar crest of humerus.
I: dorsal aspect of base of 2nd metacarpal bone.
A: extend carpal jt., abduct manus at the carpal jt.

Front 23

Extensor carpi radialis brevis muscle

Back 23

O: lateral epicondyle of humerus.
I: dorsal aspect of base of 3rd metacarpal bone.
A: extend carpal jt., abduct manus at the carpal jt.

Front 24

Digital extensor muscle

Back 24

O: lateral epicondyle of humerus.
I: middle and distal phalanges of digits 2,3,4 and 5.
A: extend carpal jt., extend joints of digits 2,3,4 and 5.

Front 25

Extensor digiti minimi muscle

Back 25

O: lateral epicondyle of humerus.
I: fuses with tendon of digital extensor distributed to the fifth digit and also attaches to the proximal phananx.
A: extend carpal jt., extend digital jt's of digit 5.

Front 26

Extensor carpi ulnaris muscle

Back 26

O: lateral epicondyle of humerus, proximal, posterior aspect of body of ulna.
I: base of 5th metacarpal bone.
A: extend carpal jt., adduct manus at carpal jt.

Front 27

Abductor pollicis longus muscle

Back 27

O: posterior aspects of radial and ulnar bodies.
I: lateral side of base of first metacarpal bone.
A: extend digital joints of thumb, abduct thumb at its carpometacarpal joint.

Front 28

Extensor pollicis brevis muscle

Back 28

O: posterior aspect of body of radius.
I: dorsal surface of proximal phalanx of thumb.
A: extend metacarpophalangeal foint of thumb, abduct thumb at the metacarpophalangeal joint.

Front 29

Extensor pollicis longus muscle

Back 29

O: posterior aspect of body of ulna.
I: dorsal aspect of distal phalanx of thumb.
A: extend digital joints of thumb, abduct thumb at its metacarpophalangeal joint.

Front 30

Extensor indicis muscle

Back 30

O: posterior aspect of body of ulna.
I: dorsal aspect of proximal phalanx of index finger.
A: extend the 2nd metacarpophalangeal joint.

Front 31

Thenar muscles

Back 31

1. abductor pollicis brevis.
2. flexor pollicis brevis.
3. opponens pollicis muscles.

Front 32

Hypothenar muscles

Back 32

1. abductor digiti minimi.
2. flexor digiti minimi brevis.
3. opponens digiti minimi muscles.
4. palmaris brevis muscle

Front 33

Intermediate muscles

Back 33

1. lumbricales.
2. dorsal interosseous.
3. palmar interosseous.
4. adductor pollicis muscles

Front 34

Posterior muscles of the antebrachium

Back 34

most of them originate on or near the lateral epicondyle of the humerus. At the dorsal aspect of carpus, many of their tendons are bound in place by the transversely oriented CARPAL EXTENSOR RETINACULUM

Front 35

Posterior muscles of the brachium

Back 35

2 muscles that extend the elbow joint and both insert on the olecranon of the ulna.

Front 36

Anterior muscles of the antebrachium

Back 36

most of them originate on or near the medial epicondyle of the humerus. At the carpus, many of their tendons pass through the carpal canal, bound therin by the overlying, transversely oriented CARPAL FLEXOR RETINACULUM

Front 37

Anterior muscles of the brachuim

Back 37

3 muscles with the action of flexion of the cubital joint.

Front 38

Muscles of the shoulder and scapula

Back 38

originate on the scapula, and insert at various loci on the proximal half of the humerus. They cause flexion, extension, adduction, abduction and rotation at the shoulder joint.