iliocostalis

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il·i·o·cos·ta·lis (mus·cle)

[TA]
the lateral division of the erector spinae, having three subdivisions: iliocostalis lumborum musculus, iliocostalis thoracis musculus, and iliocostalis cervicis musculus.

iliocostalis

the most laterally placed column of erector spinae muscles, including the iliocostalis lumborum, iliocostalis thoracis, and iliocostalis cervicis.