Iliocostalis muscle - Musculus iliocostalis


The iliocostal muscle is a slim, elongated muscle, which is composed of a series of overlapping fascicles. Its fibers are orientated in a cranioventral direction and span several vertebral segments.

Topographically, the ilioscostal muscle can be divided into a lumbar part (iliocostal lumborum in the NAV), a thoracic part (iliocostal thoracis in the NAV) and a cervical part (iliocostal cervicis in the NAV).

Origin: Crest of the ilium, transverse processes of the lumbar vertebrae and the fascial sheet ("Bogorozky tendon") which separates the iliocostal muscles from the longissimus.

Insertion: One common tendon of insertion on the last cervical vertebra

Action: Bends the vertebral column sideways

Nerve: Dorsal branches of the thoracic and lumbar nerves

Text by Antoine Micheau, MD - Copyright IMAIOS
Veterinary Anatomy of Domestic Mammals: Textbook and Colour Atlas, Sixth Edition - Horst Erich König, Hans-Georg Liebich - Schattauer - ISBN-13: 978-3794528332


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