Serratus Posterior Inferior

Where are the trigger points?

Serratus Posterior Inferior

This muscle draws the lower ribs backward and downward to assist in rotation and extension of the trunk. The Serratus Posterior Inferior is an accessory muscle for respiration and helps to elevate the ribs when inhaling and exhaling.

Common Symptoms

  • Lower-back pain
  • Pain symptoms usually are over the muscle itself
  • Trouble moving that area
  • Spasm

Common Causes

  • Twisting the body when lifting
  • Overreaching
  • Sleeping on a mattress that's too soft
  • Lifting using the back muscles instead of the leg muscles