Shoulder, Arm, Forearm Musculature

Front 1

Major Shoulder Muscle

Back 1

Deltoid

Front 2

muscle of the shoulder
Lateral of scapula to the medial humerus
medial rotation of humerus
Round

Back 2

Teres Major

Front 3

Rotator Cuff muscle
Action: Initiates abduction
Origin: Supraspinous Fossa of scapula
Insertion: greater tubercle of humerus

Back 3

Supraspinatus

Front 4

Rotator Cuff Muscle
Action: Rotates humerus laterally
Origin: Infraspinous fossa of scapula
Insertion: greater tubercle of humerus posterior to supraspinatus

Back 4

Infraspinatus

Front 5

Rotator Cuff Muscle
Runs superior and parallel to teres major
Action: Lateral rotation
Origin: lateral border of scapula
Insertion: laterally on greater tubercle of humerus, inferior to infraspinatus

Back 5

Teres Minor

Front 6

Rotator Cuff Muscle
Action: medial rotator of humerus
Origin: Subscapular fossa of scapula
Insertion: lesser tubercle of humerus

Back 6

Subscapularis

Front 7

Posterior Arm
3 head
Action: forearm extensor
Origin: scapula, humerus
Insertion: olecranon process of ulna

Back 7

Triceps brachii

Front 8

Anterior Arm
2 head
Action: flexes elbow joint & Supinates forearm
Origin: coracoid process humerus
Insertion: radial tuberosity

Back 8

Biceps Brachii

Front 9

Anterior Arm
Deep to Biceps brachii
Action: forearm flexor

Back 9

Brachialis

Front 10

Anterior Forearm
Superficial layer, short muscle close to elbow on ulna side
Action: Pronates forearm
Origin: Medial epicondyle of humerus, coronoid process of ulna
Insertion: radius

Back 10

Pronator Teres

Front 11

Anterior forearm- Superficial layer
Action: abducts hand, flexes wrist (pulse point)
Origin: medial epicondyle of humerus
Insertion: 2nd and 3rd metacarpals

Back 11

Flexor Carpi Radialis

Front 12

Anterior Forearm- Superficial layer
Action: tenses skin of palm during hand movement
Origin: medial epicondyle of humerus
Insertion: Fascia of palm

Back 12

Palmeris Longus

Front 13

Anterior Forearm- Superficial Layer
Action: flexes wrist, adducts hand
Origin: medial epicondyle of humerus, olecranon process and posterior surface of ulna
Insertion: base of 5th metacarpal

Back 13

Flexor Carpi Ulnaris

Front 14

Anterior Forearm- Middle Layer
Action: flexes wrist and middle phalanges #2-#5

Back 14

Flexor Digitorum Superficialis

Front 15

Anterior Forearm- Deep layer
flexes distal phalanx of thumb

Back 15

Flexor Pollicis Longus

Front 16

Flexes distal interphalangeal joints

Back 16

Flexor Digitorum Profundus

Front 17

Posterior Forearm- Superficial layer
Action: forearm flexion

Back 17

Brachioradialis

Front 18

Posterior Forearm- Superficial layer
Action: extends and abducts wrist
Origin: lateral epicondyle of humerus
Insertion: base of 3rd metacarpal

Back 18

Extensor Carpi Radialis (longus and brevis)

Front 19

Posterior Forearm- Superficial layer
Action: Finger extension
Origin: lateral epicondyle of humerus
Insertion: distal phalanges of fingers #2-#5

Back 19

Extensor Digitorum

Front 20

Posterior Forearm- Superficial layer
Action: extends wrist, adducts wrist
Origin: lateral epicondyle humerus and ulna
Insertion: Base of 5th metacarpal

Back 20

Extensor Capri Ulnaris

Front 21

Posterior Forearm- Deep layer
Action: Supinate Forearm
Origin: lateral epicondyle humerus, proximal ulna
Insertion: proximal end of radius

Back 21

Supinator

Front 22

Posterior Forearm- Deep layer
Abducts and extends thumb

Back 22

Abductor Pollicis Longus

Front 23

Posterior Forearm- Deep layer
extends thumb

Back 23

Extensor pollicis brevis

Front 24

Hand muscle
ball of thumb

Back 24

Thenar Eminence

Front 25

hand muscle
ball of little finger

Back 25

hypothenar eminence