Upper Limb Muscles

Pectoralis Major

A muscle located in the chest that is responsible for the flexion, adduction, and internal rotation of the humerus.

Pectoralis Minor

A muscle situated beneath the pectoralis major that helps in the stabilization of the scapula.

Serratus Anterior

A muscle that plays a critical role in the protraction and rotation of the scapula.

Subclavius

A small muscle that stabilizes the clavicle.

Trapezius

A large muscle in the upper back that helps move the shoulder blades and extends the neck.

Latissimus Dorsi

A large muscle on the back that is involved in the adduction, extension, and internal rotation of the shoulder joint.

Rhomboid Major

A muscle that retracts and elevates the scapula.

Rhomboid Minor

A smaller muscle that assists in retracting the scapula.

Levator Scapulae

A muscle that elevates the scapula and assists in neck movement.

Deltoid

A shoulder muscle responsible for the abduction, flexion, and extension of the arm.

Teres Major

A muscle that assists in the adduction and internal rotation of the arm.

Supraspinatus

A rotator cuff muscle that initiates arm abduction.

Infraspinatus

A rotator cuff muscle that laterally rotates the arm.

Teres Minor

A muscle that aids in lateral rotation of the arm.

Subscapularis

A rotator cuff muscle that medially rotates the arm.

Triceps Brachii Long Head

The long head of the triceps muscle, responsible for elbow extension.

Triceps Brachii Lateral Head

The lateral head of the triceps that assists in elbow extension.

Triceps Brachii Medial Head

The medial head of the triceps that helps extend the elbow.

Biceps Brachii Long Head

The long head of the biceps muscle, involved in flexing the elbow and shoulder.

Biceps Brachii Short Head

The short head of the biceps that also aids in elbow flexion.

Coracobrachialis

A muscle that flexes and adducts the arm.

Brachialis

A muscle that primarily flexes the elbow.

Brachioradialis

A muscle that flexes the forearm at the elbow.

Extensor Carpi Radialis Brevis

A muscle that extends and abducts the wrist.

Extensor Digitorum

A muscle that extends the fingers.

Extensor Digiti Minimi

A muscle that extends the little finger.

Extensor Carpi Ulnaris

A muscle that extends and adducts the wrist.

Extensor Indicis

A muscle that extends the index finger.

Abductor Pollicis Longus

A muscle that abducts the thumb.

Extensor Pollicis Brevis

A muscle that extends the proximal phalanx of the thumb.

Extensor Pollicis Longus

A muscle that extends the distal phalanx of the thumb.

Pronator Teres

A muscle that pronates the forearm.

Flexor Carpi Radialis

A muscle that flexes and abducts the wrist.

Palmaris Longus

A muscle that assists in wrist flexion.

Flexor Carpi Ulnaris

A muscle that flexes and adducts the wrist.

Flexor Digitorum Superficialis

A muscle that flexes the proximal interphalangeal joints of the fingers.

Flexor Digitorum Profundus

A muscle that flexes the distal interphalangeal joints of the fingers.

Flexor Pollicis Longus

A muscle that flexes the thumb.

Thenar compartment

Muscles that act on the thumb.

Hypothenar Compartment

Muscles that act on the little finger.

Lumbricals

Muscles that flex the metacarpophalangeal joints and extend the interphalangeal joints.