Muscles
Biceps Brachii
Muscle of the upper arm that flexes the elbow and shoulder, and supinates the forearm.
Brachialis
Muscle of the upper arm that flexes the elbow.
Coracobrachialis
Muscle of the upper arm and axillary region that flexes and adducts the shoulder.
Pectoralis Major
A large, superficial muscle of the chest; all fibers adduct and medially rotate the shoulder, may assist in forced inhalation if arm is fixed; upper fibers flex and horizontally adduct the shoulder; lower fibers extend the shoulder.
Pectoralis Minor
Muscle of the chest deep to pectoralis major that depresses, abducts, and tilts the scapula anteriorly; may assist in forced inhalation if scapula is fixed.
Trapezius
Large muscle of the upper back; upper fibers bilaterally extend the head and neck; unilaterally, they laterally flex and rotate the head and neck to the same side, elevate and upwardly rotate the scapula; middle fibers adduct and stabilize the scapula; lower fibers depress and upwardly rotate the scapula.
Latissimus Dorsi
Broad muscle of the lateral posterior body that extends, adducts, and medially rotates the shoulder.
Deltoid
Muscle of the lateral shoulder; all fibers abduct the shoulder; anterior fibers flex, medially rotate, and horizontally adduct the shoulder; posterior fibers extend, laterally rotate, and horizontally abduct the shoulder.
Rhomboids Major
Muscle between the scapula and the spine that adducts, elevates, and downwardly rotates the scapula. It is located inferior to the rhomboid minor.
Rhomboids Minor
Muscle between the scapula and the spine that adducts, elevates, and downwardly rotates the scapula. It is located superior to the rhomboid major.
Supraspinatus
Rotator cuff muscle that abducts the shoulder and stabilizes the head of the humerus in the glenoid cavity.
Infraspinatus
Rotator cuff muscle that laterally rotates, adducts, extends, and horizontally abducts the shoulder, and stabilizes the head of the humerus in the glenoid cavity.
Teres Major
Posterior shoulder muscle that extends, adducts, and medially rotates the shoulder; known as "little helper" of the latissimus dorsi.
Teres Minor
Rotator cuff muscle that runs along the upper lateral border of the scapula; it laterally rotates, adducts, extends, and horizontally abducts the shoulder, and stabilizes the head of the humerus in the glenoid cavity.
Subscapularis
Rotator cuff muscle that medially rotates the shoulder and stabilizes the head of the humerus in the glenoid cavity.
Serratus Anterior
Muscle on the lateral and posterior rib cage; with the origin fixed, it abducts and depresses the scapula, and holds the medial border of the scapula against the rib cage; if the scapula is stabilized, it may assist in forced inhalation.
Triceps Brachii
Muscle of the posterior arm; all three heads extend the elbow; long head extends and adducts the shoulder.
Anconeus
The anconeus is a small muscle located at the elbow attaching the humerus and ulna. Although the anconeus muscle is active during elbow extension the importance of the anconeus for the movement itself is probably very small. The Triceps brachii muscle is by far the major muscle responsible for elbow extension.
Anterior deltoids
The front delts that help move your arm forward. They connect to your clavicle. You use your front delts if you reach for an object on a shelf.
Middle deltoids
The deltoid has three functionally and anatomically distinct parts. The acromial part, sometimes also known as the middle or central, is the largest and the strongest. It is a multipennate muscle.
Lateral deltoids
Side delts that help move your arm out to the side, as well as up and down.
Posterior deltoids
Rear delts that help move your arm backward. They connect to the flat surface of your shoulder blade. You use your rear delts if you pitch a baseball.
Deltoid
The Deltoid muscle is a large triangular-shaped muscle that lies over the glenohumeral joint and which gives the shoulder its rounded contour. It is comprised of three distinct portions (anterior or clavicular, middle or acromial, and posterior or spinal)
Brachioradialis
The brachioradialis is a superficial forearm muscle located in the lateral forearm. The brachioradialis primarily flexes the forearm at the elbow but also functions to supinate or pronate depending on the rotation of the forearm
Brachioradialis
A superficial muscle on the radial side of the forearm that flexes the elbow and assists in pronation and supination of the forearm with resistance; it crosses the elbow but not the wrist joint.
Latissimus Dorsi
A broad flat superficial muscle chiefly of the middle and lower back that extends, adducts, and rotates the arm medially and draws the shoulder downward and backward.
Biceps Brachii
The term biceps brachii is a Latin phrase meaning "two-headed [muscle] of the arm", in reference to the fact that the muscle consists of two bundles of muscle, each with its own origin, sharing a common insertion point near the elbow joint... the muscle's primary function is to flex the elbow and rotate the forearm. The heads of the muscle arise from the scapula (shoulder blade) and combine in the middle arm to form a muscle mass.
Extensor Carpi Ulnaris
The extensor carpi ulnaris muscle is an elongated fusiform muscle located in the posterior compartment of the forearm and primarily functions to extend and adduct the wrist. It spans between the elbow and the base of the little finger.
Extensor Carpi Ulnaris
A muscle of the forearm along the ulnar shaft that extends and adducts the wrist.
Extensor Digitorum
Muscle of the forearm with four long tendons that extends the second through fifth fingers and assists in extension of the wrist.
Extensor Carpi Radialis Longus
Longer muscle of the forearm that extends and abducts the wrist, and assists in flexion of the elbow.
Extensor Carpi Radialis Longus
The extensor carpi radialis longus is one of five primary muscles of the arm that control the movement of the wrist. A long muscle on the radial side of the wrist that extends. Function: Extends the arm at the wrist; radially abducts the hand at the wrist.
Flexor Digitorum Superficialis
A superficial muscle of the anterior forearm that flexes the second through fifth fingers and flexes the wrist... Superficial muscle that flexes (bends) the fingers.
Flexor Digitorum Profundus
The deep muscle of the anterior forearm that flexes the second through fifth fingers and may flex the wrist.
Flexor Carpi Radialis
A muscle of the anterior forearm that flexes and abducts the wrist and assists with elbow flexion... The flexor carpi radialis is a superficial forearm muscle that is involved in flexion and abduction of the hand. Function: The flexor carpi radialis provides flexion and abduction of the hand at the wrist.
Levator Scapula
The muscle from the superior angle of the scapula to the transverse processes of C1–C4; it elevates and downwardly rotates the scapula, laterally flexes and rotates the head and neck to the same side, and extends the head and neck.
Pronator Quadratus
A square-shaped muscle on the distal forearm that acts to pronate (turn so the palm faces downwards) the hand.
Pronator Quadratus
Square muscle that turns hand inward.
Supinator
A muscle on the lateral side of the elbow that supinates the forearm.