Iliocostalis

 ( Muscles Of The Torso ) 

Iliocostalis muscle is the muscle immediately lateral to the longissimus that is the nearest to the furrow that separates the epaxial muscles from the hypaxial. It lies very deep to the fleshy portion of the serratus posterior muscle. It laterally flexes the vertebral column to the same side.

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Structure Iliocostalis muscle has a common origin from the iliac crest, the sacrum, the thoracolumbar fascia, and the Vertebra of the from T11 to Lumbar vertebrae.

(2011). 9780443068157, Churchill Livingstone. ISBN 9780443068157

Iliocostalis cervicis (cervicalis ascendens) arises from the angles of the third, fourth, fifth, and sixth ribs, and is inserted into the posterior tubercles of the transverse processes of the fourth, fifth, and sixth cervical vertebrae.

Iliocostalis thoracis (musculus accessorius; iliocostalis thoracis) arises by flattened tendons from the upper borders of the angles of the lower six ribs medial to the tendons of insertion of the iliocostalis lumborum; these become muscular, and are inserted into the upper borders of the angles of the upper six ribs and into the back of the transverse process of the seventh cervical vertebra.

Iliocostalis lumborum (iliocostalis muscle; sacrolumbalis muscle) is inserted, by flattened , into the inferior borders of the angles of the lower six to nine .

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Nerve supply Iliocostalis muscle is supplied by the dorsal rami of .

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Function

Iliocostalis muscle laterally flexes the vertebral column to the same side. It bilaterally extends the vertebral column.

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See also

• Erector spinae muscles
• Longissimus
• Semispinalis muscles
• Spinalis

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External links

• – "Intrinsic muscles of the back."
• Dissection at ithaca.edu

Categories: Muscles Of The Torso

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