Subscapularis

Anatomy pictures

Referred pain pattern

Muscle Type

• Postural
  • Shortens when overactivated

Symptoms

• Frozen shoulder
• Problems/limited motion in lateral rotation and/or abduction of arm
• Difficulty with moving arm in retraction, as in stretching the arm to the back to reach for something

Muscle attachment zones

Videos

Short version

Detailed version

MyoFascial lines

Deep Dorsal Arm Line

• Levator scapula
• Rhomboideus
• Supraspinatus, Infraspinatus, Subscapularis and Teres Minor
• Triceps brachii
• Ulnar periosteum
• Ulnar collateral ligaments
• Hypothenar muscles
  • Opponens digiti minimi
  • Flexor digiti minimi brevis
  • Abductor digiti minimi

Synergists

Medial rotation shoulder

• Anterior Deltoideus
• Pectoralis Major
• Latissimus Dorsi
• Teres Major

Antagonists

Lateral rotation shoulder

• Posterior Deltoideus
• Infraspinatus
• Teres Minor

Anatomy

Position

• Deep

Origin

• Fossa subscapularis scapula

Insertion

• Tuberculum minor humerus

Main function

• Shoulder
  • Medial rotation

Nerve innervation

• Segmental
  • C5-C6
• Peripheral
  • Upper and lower subscapular nerves

Arterial supply

• Circumflex scapular artery
• Dorsal scapular artery
• Suprascapular artery
• Lateral thorocal artery