Iliocostalis Lumborum

Iliocostalis Lumborum The muscle indicated is the iliocostalis lumborum muscle, one of the erector spinae group of back muscles. The back muscles can be divided into three groups of muscles: Superficial Intermediate Deep group The erector spinae muscles belong to the deep (intrinsic) group of back muscles and are the largest group of intrinsic back muscles. There are three main erector spinae muscles, from lateral to medial: Iliocostalis Longissimus Spinalis Each of these three muscles is further subdivided into separate parts: Lumborum Thoracis Cervicis Capitis Origin: sacrum, iliac crest, spinous processes of lumbar vertebrae and thoracic vertebrae T11 and T12 …

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