serratus posterior

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Related to serratus posterior: Splenius capitis, Quadratus lumborum
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Noun1.serratus posterior - skeletal muscle that draws the rib cage backward and downward
serratus, serratus muscles - any of several muscles of the trunk
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
serratus posterior superior - a thin quadrilateral muscle of the upper and dorsal part of the thorax; acts to elevate the upper ribs
References in periodicals archive ?
It is an inverted triangle the base of which is formed by the 12th rib and the lower edge of serratus posterior inferior muscle, anteriorly bounded by the posterior border of internal oblique muscle, posteriorly bounded by the anterior border of sacrospinalis muscle.
It then passes deep to the upper trapezius fibres as they curve/course laterally toward the acromion, lying anterior to the rhomboid major and minor but posterior to the serratus posterior superior muscle (SPS).
The spinal extensors: deep muscles--erector spinae: spinalis, longissimus, iliocostalis, which inserts between the spinous and the transverse processes, its main role being to hold up the spine and ensure its stability; intermediate muscles: serratus posterior superior, serratus posterior inferior; superficial muscles: rhomboideus minor; these muscles are responsible for the movement.