Structures

  • Serratus posterior superior
  • Serratus posterior inferior

MuscleActionOriginInsertionInnervationBlood supply
Serratus posterior superior- Elevates ribs 2-5- Ligamentum nuchae
- Spinous processes of C7-T3
- Supraspinous ligaments
- Superior edgeof ribs 2-5 (lateral to their angles)- Anterior rami of upper thoracic nerves: T2-T5- Intercostal arteries
Serratus posterior inferior- Depresses ribs 9-12- Spinous processes T11-L3
- Supraspinous ligaments T11-L3
- Lower border of ribs 9-12 (lateral to their angles)- Anterior rami of lower thoracic nerves: T9-T12- Intercostal arteries