Synonyms
Latin: Musculus iliocostalis English: iliocostal muscle Synergists: Musculus latissimus dorsi Antagonists: Musculus sternocleidomastoideus, Musculus longus colli, longus capitis
Definition
The iliocostalis muscle (iliac-rib muscle) is a muscle that belongs to the autochthonous back muscles. It is located above the transverse processes (epaxial) and lateral to the longissimus muscle. It is located in the lateral tract of the M. erector spinae and belongs there to the sacrospinal system. A distinction is made between the lumbar, thoracic and cervical parts:
- The lumbar part (Musculus iliocostalis lumborum) originates from the intestine and sacrum (sacrum) and extends to the rib processes (Processus costales) of the upper lumbar vertebrae and the 6th-9th rib. – Chest part (Musculus iliocostalis thoracis) originates at the lower ribs and ends at the upper ribs
- Part of the neck (Musculus iliocostalis cervicis) originates from the 6th-3rd rib and attaches to the transverse processes of the 6th-4th cervical vertebrae, in pets only to the 7th cervical vertebra.
History
Approach: ribs and cervical vertebrae Origin: ilium and sacrum Innervation: spinal nerves (Rami dorsales)
Function
Like the other epaxial muscles, the iliocostalis muscle serves as a stabilizer for the spinal column. It also straightens the spinal column, which is why it is also known as the “Musculus erector spinae” (“Straightening of the spinal column”) together with the epaxial muscles. When the paired muscle contracts on one side, the spine is bent to the side.
