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Biceps Brachii

Contents

Anatomy pictures

Biceps brachii - anterior
Biceps brachii - anterolateral

Referred pain pattern

Pain patterns:

  • Lateral and anterior part of the shoulder radiating down the anterior aspect of upper arm
  • Pain around the area of the bicipital tendon attachment

Muscle type:

Phasic

  • Weakens when overactivated

Symptoms:

  • Crepitation sound in shoulder joint when abducting the upper arm
  • Weakness or pain in lifting the arm over the head
  • Pain in supination or flexion of forearm

Muscle attachment zones

Videoes

Short version

Detailed version

MyoFascial lines

Deep ventral arm line

Synergists

Flexion elbow

  • Brachialis
  • Brachioradialis
  • Pronator Teres
  • Flexor Carpi Radialis
  • Palmaris Longus
  • Flexor Carpi Ulnaris
  • Flexor Digitorum Superficialis
  • Flexor Pollicis Longus
  • Extensor Carpi Radialis Longus
  • Extensor Carpi Radialis Brevis

Supination elbow

  • Supinator
  • Brachioradialis
  • Abductor Pollicis Longus
  • Extensor Pollicis Brevis
  • Extensor Pollicis Longus
  • Extensor Indicis

Antagonists

Extension elbow

  • Triceps Brachii
  • Anconeus
  • Extensor Digitorum
  • Extensor Digiti Minimi
  • Extensor Carpi Ulnaris

Pronation elbow

  • Pronator Quadratus
  • Pronator Teres
  • Brachioradialis
  • Flexor Carpi Radialis
  • Palmaris Longus
  • Extensor Carpi Radialis Longus

Anatomy

Position

  • Superficial

Origin

  • Long head
    • Tuberculum supraglenoidale scapula
  • Short head
    • Processus coracoideus scapula

Insertion

  • Tuberositas radii
  • Bicipital aponeurosis

Main function

  • Elbow
    • Flexion
    • Supination
  • Shoulder
    • Flexion

Secondary function

  • Shoulder
    • Abduction
    • Adduction

Nerve innervation

  • Segmental
    • C5-C6
  • Peripheral
    • Musculocutaneous

Arterial supply

  • Brachial artery
  • Anterior circumflex humeral artery