Posterior thorax
Serratus posterior inferior
Assists depression and proprioceptive control of the lower ribs during breathing
- Origin
- Spinous processes from T11 through L2 and thoracolumbar fascia
- Insertion
- Inferior borders of ribs nine through twelve
- Primary actions
- Assists depression and proprioceptive control of the lower ribs during breathing
Educational anatomy reference only. This page does not diagnose pain, injury, or movement limitations.
From anatomy to action
Explore the movement, not just the muscle.
A single muscle rarely explains a movement by itself. Use the related movement content to see how this anatomy may contribute, then choose a focused program when you want a complete progression.
