Cervicis refers to the cervical spine, thoracis the thoracic spine and lumborum the lumbar spine. This article will discuss the muscles in each of these three intrinsic back muscle subgroups.Ī small note on nomenclature that makes learning the orientation of muscles easier: capitis refers to head, and any muscle with capitis in the name will insert into the head. Interspinales, interansversarii, levatores costarum.Semispinalis (thoracis, cervicis, capitis).Longissimus (thoracis, cervicis, capitis).Iliocostalis (lumborum, thoracis, cervicis).They are divided into three groups, as shown below. The deep back muscles lie immediately adjacent to the vertebral column and ribs. This article will focus on the deep group. The deep group are the intrinsic muscle group. The first two groups ( superficial and intermediate) are referred to as the extrinsic back muscles. Intermediate: attached to the posterior thorax.Superficial: attached to the shoulder girdle.There are three major groups of back muscles: You might also be interested in our Anatomy Flashcard Collection which contains over 2000 anatomy flashcards in addition to advanced features such as spaced repetition.
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