Scalenus posterior

• I (insertion):

  • 2nd rib

  A) scalenus posterior

  
• A (action):

  • Unilateral action: ipsilateral lateral flexion

  A) scalenus posterior

  
• O (origin):

  • Transverse processes of cervical spine

  A) scalenus posterior

  
• R (direction):

  • Downwards and laterally

  A) scalenus posterior

  
• A (actions):

  • All 3 assist with respiration

  A) scalenus posterior

  
• NS (nerve supply):

  • Ventral rami cervical spine (C3 - C8)

  A) scalenus posterior