#posterior_serratus_muscle__serratus_posterior__musculus_serratus_posterior  skeletal muscle that draws the rib cage backward and downward
  supertype:  #serratus_muscles__serratus  any of several muscles of the trunk
  subtype:  #serratus_posterior_inferior  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
  subtype:  #serratus_posterior_superior  a thin quadrilateral muscle of the upper and dorsal part of the thorax; acts to elevate the upper ribs

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