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Muscles of the trunk
Last reviewed: 23.04.2024
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Muscles of the body are divided into muscles of the back, chest and abdomen. The posterior regions of the trunk (regiones dorsales) encompass the entire posterior surface of the trunk. The upper back boundary is formed by the outer occipital protrusion and the superior occipital line of the occipital bone. The lower boundary is the level of the sacroiliac joints and the coccyx. The sides of the back border on the shoulder girdle, axillary fossa and lateral surfaces of the chest and abdomen along the rear right and left axillary lines. Within the back, separate areas are distinguished: vertebralis, regio sacralis, regio scapularis, regio infrascapularis and regio lumbalis. In addition, for the convenience of describing the muscles, the posterior region of the neck (regio cervicalis posterior) is also included here.
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