1. Lateral flexors of the vertebral column (10) back 29. Erector spinae (iliocostalsis, longissimus, spinalis). Intertransversarii and levatores costarum. Intertransversarii: posterior and anterior. Levatores costarum: posterior rami of C8-T11 specifically. Neck and head flexors(4).
2. The levatores costarum, interspinales and intertransversarii muscles form the deepest layer of the deep back muscles and are sometimes referred to as the segmental muscles or the minor deep back muscles.

definition - Levatores costarum muscles

Distribution patterns of the nerves of supply to the intertransversarii posteriores cervicis, levatores costarum breves and intertransversarii laterales lumborum were carefully studied in nine body-halves of male human cadavers. Any of these muscles lie wegded in between the commencements of the dorsal and ventral primary rami of the spinal nerves. In the great majority of the cases the. The interspinales and intertransversarii are small intrinsic muscles of the spine that are located between adjacent vertebrae, primarily in the lumbar and cervical regions. As their names indicate, the interspinales are located between the spinous processes, and the intertransversarii are located between the transverse processes (Figure 8-11). Interspinales; Intertransversales colli; Intertransversales lumborum; Lateral digital extensor - pelvic; Lateral digital extensor - thoracic; Latissimus dorsi; Levatores costarum; Long digital extensor; Long digital flexor - pelvic; Longissimus; Longissimus capitus et atlantis; Longissimus costarum; Longus colli; Masseter; Medial digital.

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Wikipedia

The Levatores costarum, twelve in number on either side, are small tendinous and fleshy bundles, which arise from the ends of the transverse processes of the seventh cervical and upper eleven thoracic vertebrae

They pass obliquely downward and laterally, like the fibers of the Intercostales externi, and each is inserted into the outer surface of the rib immediately below the vertebra from which it takes origin, between the tubercle and the angle (Levatores costarum breves).

Each of the four lower muscles divides into two fasciculi, one of which is inserted as above described; the other passes down to the second rib below its origin (Levatores costarum longi).

Their role in normal inspiration, if any, is uncertain. They have been suggested to have a proprioceptive function.

External links

• LUClc
• 597295163 at GPnotebook
• Levator+costarum+muscles at eMedicine Dictionary

Levatores Costarum Brevis

This article was originally based on an entry from a public domain edition ofGray's Anatomy. As such, some of the information contained within it may be outdated.

Interspinales Muscle

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Levatores Costarum Function

Levatores Costarum Innervation