Iliocostalis
Iliocostalis
Iliocostalis (pronunciation: il-ee-oh-kos-TAY-lis) is a muscle that is part of the Erector Spinae group, which is the largest group of muscles in the back.
Etymology
The term "Iliocostalis" is derived from the Latin words "ilio" meaning flank, and "costa" meaning rib. This is due to the muscle's location and its attachments from the ribs to the flank (or ilium).
Anatomy
The Iliocostalis muscle is further divided into three parts:
- Iliocostalis lumborum - the lowermost part, which originates from the sacrum and ilium and inserts into the lower ribs.
- Iliocostalis thoracis - the middle part, which originates from the lower ribs and inserts into the upper ribs.
- Iliocostalis cervicis - the uppermost part, which originates from the upper ribs and inserts into the cervical vertebrae.
Function
The Iliocostalis muscle, like other muscles in the Erector Spinae group, plays a crucial role in maintaining upright posture and in movements of the vertebral column. It helps in the extension and lateral flexion of the vertebral column and also aids in the rotation of the back.
Related Terms
- Erector Spinae - The muscle group to which the Iliocostalis belongs.
- Spinalis - Another muscle in the Erector Spinae group.
- Longissimus - Another muscle in the Erector Spinae group.
- Vertebral column - The part of the body where the Iliocostalis is located.
External links
- Medical encyclopedia article on Iliocostalis
- Wikipedia's article - Iliocostalis
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