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Extensor carpi radialis longus and brevis

Contents

Anatomy pictures

 

Extensor carpi radialis longus

Extensor carpi radialis longus - posterior view
Extensor carpi radialis longus - anterior view
Extensor carpi radialis longus - lateral view

Extensor carpi radialis brevis

Extensor carpi radialis brevis - posterior view
Extensor carpi radialis brevis - anterolateral view
Extensor carpi radialis brevis - lateral view

Referred pain

Extensor carpi radialis longus pain pattern
Extensor carpi radialis brevis pain pattern

Muscle type

  • Phasic (both)
    • Weakens when overactivated

Symptoms

  • Lateral epicondylitis
  • Weakness of grip, problems using power tools or other tools
  • Painful supination
  • Reduced range of motion of wrist flexion and ulnar deviation

Muscle attachment zones

Origin zone of extensor carpi radialis longus
Insertion zone of extensor carpi radialis longus
Origin zone of extensor tendons
Insertion zone of extensor carpi radialis brevis

Videos

Short version

 

Detailed version

Myofascial lines

Superficial dorsal arm line

Anatomy

Extensor carpi radialis longus

Position

  • Superficial

Origin

  • Lateral supracondylar ridge of humerusdistal 1/3
  • Lateral intermusculare septum

Insertion

  • 2. metacarpal, posterior aspect

Main function

  • Wrist:
    • Extension
    • Radial deviation

Secondary function

  • Elbow:
    • Flexion
    • Pronation

Nerve innervation

  • Segmental:
    • C5-C7
  • Peripheral:
    • Nervus radialis

Arterial supply

  • Brachial artery
  • Radial artery

Extensor Carpi Radialis Brevis

Position

  • Superficial

Origin

  • Lateral epicondylus humerus
  • Fascia antebrachii

Insertion

  • 3. metacarpal, posterior aspect

Main function

  • Wrist:
    • Extension
    • Radial deviation

Secondary function

  • Elbow:
    • Flexion

Nerve innervation

  • Segmental:
    • C6-C8
  • Peripheral:
    • Nervus radialis

Arterial supply

  • Brachial artery
  • Radial artery