Muscles Arm and Forearm

Pectoralis Minor

Draws scapula forward and downward with ribs fixed

Serratus Anterior

Rotates Scapula so that its inferior angle moves laterally and upward (ABduction or protraction of scapula)

Trapezius

Stabilizes, raises, retracts, depress and rotates scapula

Levator Scapulae

Elevates/Addicts scapula

Rhomboid Major and Minor

Stabilize Scapula

Pectoralis Major

Prime mover of arm flexion, Roates arm medially, adducts arm

Latissimus Dorsi

Prime mover of arm extension, powerful arm adductor, medially rotates arm and shoulder

Deltoid

Prime mover of arm ABduction

Teres Major

Extends, medially rotates, adducts humerus

subscapularis

chief medial rotator of humerus

supraspinatus

initates ABduction at shoulder

Infraspinatus

Rotates humerus lateraly

Teres minor

Rotates humerus laterally

Rotator cuff:

Includes Subscapularis, Supraspinatus, Infraspinatus, and Teres minor

Coracobrachialis

Flexion and adduction of the humerus (synergist of pectoralis major)

Triceps Brachii

Powerful forearm extension

Biceps brachii

flexion at elbow and shoulder and supinates forearm

Brachialis

a major forearm flexor

Pronator teres

Pronates forearm

Flexor carpi radialis

powerful flexor of wrist, ABducts hand

Palmaris longus

tenses skin and fascia of palm during hand movements.

Flexor carpi ulnaris

Powerful flexor of wrist, Adducts hand

Flexor digitorum superficialis

flexion at middle phalanges and wrist joint

Brachioradialis

synergist in forearm flexion

Extensor carpi radialis longus

extends wrist and ABducts wrist

Extensor carpi radialis brevis

Extends and ABducts wrist

Extensor digitorum

Prime mover of finger extension, extends wrist, can ABduct fingers.

Extensor carpi ulnaris

extends wrist

Supinator

Assists biceps brachii to forcibly supinate forearm