Muscles Of Posterior Thoracic Wall Stock Image C020 0418 Science There are 11 pairs of external intercostal muscles. they run inferoanteriorly from the rib above to the rib below, and are continuous with the external oblique of the abdomen. attachments: originate at the lower border of the rib, inserting into the superior border of the rib below. actions: elevates the ribs, increasing the thoracic volume. The muscles that make up the thorax wall include the three intercostal muscles (external, internal, and innermost), the subcostalis, and the transversus thoracis. eleven pairs of intercostal muscles are in each of the intercostal spaces, arranged from superficial to deep. the most superficial layer is the external intercostal muscle, which.
Posterior Thoracic Cage Muscles Quiz Muscles of the thorax. the muscles of the thorax include both the diaphragm as well as the muscles of the thoracic cage. the diaphragm can be located below the lungs and consists of a sheet of skeletal muscle which displays a double domed structure. the diaphragm is important as it separates the thoracic cavity from the abdominal cavity and. The trunk (torso) is the central part of the body to which the head and the limbs are attached. except for the brain, the trunk houses all the vital organs of the human body. the torso muscles attach to the skeletal core of the trunk, and depending on their location are divided into two large groups: anterolateral muscles of the trunk. The thoracic, or chest wall, consists of a skeletal framework, fascia, muscles, and neurovasculature – all connected together to form a strong and protective yet flexible cage. the thorax has two major openings: the superior thoracic aperture found superiorly and the inferior thoracic aperture located inferiorly. Serratus posterior superior – is a thin, quadrilateral shaped muscle, located at the upper and back part of the thoracic spine. it lies deep to the rhomboids and aids inspiration by elevating ribs 2 to 5 where it attaches. serratus posterior inferior – is located at the junction of the thoracic and lumbar regions.
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