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Arm Muscles : Origin, Insertion, Nerve supply & Action

The upper arm is between the shoulder and elbow joint. It contains four muscles in two compartments-
Anterior compartment
Posterior compartment

Anterior compartment of the arm

  • Biceps brachii
  • Brachialis
  • Coracobrachialis

Nerve Supply: All muscle of the Anterior compartment innervated by the musculocutaneous nerve

Arterial Supply: Muscular branches of the brachial artery.

Arm Muscles

Posterior compartment of the arm

  • Triceps brachii

Nerve Supply: Posterior compartment innervated by the Radial nerve.

Arterial Supply: Posterior compartment of the upper arm is via the profunda brachial artery.

Upper Extrimity Muscle Atlas

  • Abductor Pollicis Longus
  • Abductor Digiti Minimi
  • Abductor Pollicis Brevis
  • Adductor Pollicis
  • Anconeus
  • Biceps Brachii
  • Brachioradialis
  • Brachialis
  • Coracobrachialis
  • Deltoid
  • Extensor Carpi Radialis Longus
  • Extensor Carpi Radialis Brevis
  • Extensor Carpi Ulnaris
  • Extensor Digitorum
  • Extensor Digiti Minimi
  • Extensor Indicis
  • Extensor Pollicis Longus
  • Extensor Pollicis Brevis
  • Flexor Carpi Radialis
  • Flexor Carpi Ulnaris
  • Flexor Digitorum Profundus
  • Flexor Digitorum Superficialis
  • Flexor Digiti Minimi Brevis
  • Flexor Pollicis Brevis
  • Flexor Pollicis Longus
  • Infraspinatus
  • Interosseous Muscles, Dorsal
  • Interosseous Muscles, Palmar
  • Levator Scapulae
  • Latissimus Dorsi
  • Opponens Digiti Minimi
  • Opponens Pollicis
  • Pectoralis Major
  • Pectoralis Minor
  • Palmaris Longus
  • Pronator Quadratus
  • Pronator Teres
  • Rhomboid Major and Minor
  • Subscapularis
  • Supinator
  • Serratus Anterior
  • Supraspinatus
  • Trapezius
  • Triceps Brachii
  • Teres Major
  • Teres Minor
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