Contents
Anatomy
Position
- Deep
Origin
- 3.-5. ribs
Insertion
- Processus coracoideus scapulae
Main function
- Scapula
- Protraction
- Depression
- 3.-5. ribs
- Elevation
Secondary function
- Scapula
- Downward rotation
Nerve innervation
- Segmental: C5-Th1
- Peripheral: Medial and lateral pectoral nerves
Arterial supply
- Pectoral branches of the thoracoacromialstem
- Posterior intercostal artery
- Lateral thorocal artery
Referred pain pattern
Symptoms
- Mimicing cardiac pain
- Entrapment of nerve or blood vessels when reaching overhead or sleeping with arms overhead
Videos
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Detailed version
MyoFascial lines
Deep ventral arm line
- Pectoralis minor
- Clavipectoral fascia
- Biceps brachii
- Radial periosteum anterior border
- Radial collateral ligaments
- Thenar muscles
Synergists
Protraction scapula
- Serratus Anterior
- Pectoralis Major
Depression scapula
- Trapezius (lower)
- Latissimus Dorsi
- Pectoralis Major
- Serratus Anterior
Antagonists
Retraction scapula
- Trapezius
- Rhomboideus Major and Minor
- Levator Scapulae
Elevation scapula
- Trapezius (upper)
- Levator Scapulae
- Rhomboideus Major and Minor
- Serratus Anterior
- Pectoralis Major