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The muscle is situated at the junction of the thoracic and lumbar regions. [1] It has an irregularly quadrilateral form, broader than the serratus posterior superior muscle, and separated from it by a wide interval. It arises by a thin aponeurosis from the spinous processes of the lower two thoracic and upper two or three lumbar vertebrae. [1]
Hypaxial muscles include some vertebral muscles, the diaphragm, the abdominal muscles, and all limb muscles. The serratus posterior inferior and serratus posterior superior are innervated by the ventral primary ramus and are hypaxial muscles. Epaxial muscles include other (dorsal) muscles associated with the vertebrae, ribs, and base of the skull.
It entails the fasciae and aponeuroses of the latissimus dorsi muscle, serratus posterior inferior muscle, abdominal internal oblique muscle, and transverse abdominal muscle. [ 4 ] In the lumbar region, it is known as lumbar fascia and here consists of 3 layers (posterior, middle, and anterior) enclosing two muscular compartments.
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Serratus posterior superior muscle; Serratus posterior inferior muscle; Notes This page was last edited on 22 October 2020, at 23:07 (UTC). Text is ...
Serratus posterior may refer to: Serratus posterior superior muscle , a thin, quadrilateral muscle, situated at the upper and back part of the thorax Serratus posterior inferior muscle , a muscle that lies at the junction of the thoracic and lumbar regions
serratus posterior inferior: Torso, Chest vertebrae T11 – L3: inferior borders of 9th through 12th ribs: intercostal arteries: intercostal nerves: depresses lower ribs(IX to XII), aiding in expiration: 2 1 serratus posterior superior: Torso, Chest nuchal ligament (or ligamentum nuchae) and spinous processes of vertebrae C7 through T3
These muscles are responsible for several actions of the glenohumeral joint. The third group, which is mainly responsible for stabilization and rotation of the scapula, consists of the trapezius, serratus anterior, levator scapulae, and rhomboid muscles and attach to the medial, superior, and inferior borders of the scapula.