Muscle Practical #2: Arm And Leg Muscles

Front 1

Triceps brachii

Back 1

Origins: infraglenoid tubercle of scapula; medial and posterior humerus

Insertion: olecranon of ulna

Action: elbow extension

Front 2

Biceps brachii

Back 2

Origins: coracoid process and superglenoid tubercle of the scapula

Insertion: radial tuberosity

Actions: elbow flexion; forearm supination

Front 3

Brachialis

Back 3

Origin: distal anterior humerus

Insertion: coronoid process of ulna

Action: elbow flexion

Front 4

Brachioradialis

Back 4

Origin: lateral distal humerus

Insertion: styloid process of radius

Action: elbow flexion

Front 5

Flexor carpi radialis

Back 5

Origin: medial epicondyle of humerus

Insertions: base of metacarpals 2 and 3

Actions: flexes wrist; abducts hand

Front 6

Flexor carpi ulnaris

Back 6

Origins: medial epicondyle of humerus; olecranon process of ulna

Insertions: base of metacarpal 5; pisiform and hamate bones

Actions: flexes wrist; adducts hand

Front 7

Extensor carpi radialis longus

Back 7

Origin: lateral supracondylar ridge of humerus

Insertion: base of metacarpal 2

Actions: extends and abducts wrist

Front 8

Extensor carpi ulnaris

Back 8

Origins: lateral epicondyle of humerus; posterior ulna

Insertion: base of metacarpal 5

Actions: extends and adducts wrist

Front 9

Sartorius

Back 9

Origin: anterior superior iliac spine

Insertion: medial proximal tibia

Actions: flexes, abducts, and laterally rotates hip; flexes knee

Front 10

Gracilis

Back 10

Origins: inferior Talmud and body of pubis

Insertion: proximal medial tibia

Actions: adducts hip; flexes knee; medially rotates femur