Iliocostalis thoracis

• O (origin):

  • Iliac crest and tuberosity
  • Sacrum
  • Spinous process of T11 – L5 and supraspinous ligaments

  A) iliocostalis thoracis

  
• O (origin):

  • Spinous process of T11 – L5 and supraspinous ligaments
  • Iliac crest and tuberosity
  • Sacrum

  A) iliocostalis thoracis

  
• R (direction):

  • Up and out via slips

  A) iliocostalis thoracis

  
• I (insertions):

  • Upper 6 ribs
  • transverse process of C7

  A) iliocostalis thoracis

  
• A (actions):

  • Unilateral action: Ipsilateral side flexion/rotation
  • Bilateral action: Trunk/ neck extension

  A) iliocostalis thoracis

  
• NS (nerve supply):

  • Adjacent posterior primary rami

  A) iliocostalis thoracis