serratus posterior inferior

Definitions of serratus posterior inferior

1. noun

   a thin quadrilateral muscle at the junction of the thoracic and lumbar regions; acts to counteract the pull of the diaphragm on the ribs to which it is attached
   type of:

   musculus serratus posterior, posterior serratus muscle, serratus posterior

   skeletal muscle that draws the rib cage backward and downward