Iliocostalis

Iliocostalis is a muscle that is part of the Erector Spinae, one of the major muscle groups that contribute to the human body's movement and posture. It is further divided into three parts: Iliocostalis Lumborum, Iliocostalis Thoracis, and Iliocostalis Cervicis.

Anatomy

The Iliocostalis muscle is located in the back and is part of the larger Erector Spinae muscle group. This group of muscles is responsible for extending the vertebral column, allowing for movements such as standing up straight and leaning back.

Iliocostalis Lumborum

The Iliocostalis Lumborum is the lowermost part of the Iliocostalis. It originates from the sacrum and iliac crest and inserts into the lower ribs.

Iliocostalis Thoracis

The Iliocostalis Thoracis is the middle part of the Iliocostalis. It originates from the lower ribs and inserts into the upper ribs.

Iliocostalis Cervicis

The Iliocostalis Cervicis is the uppermost part of the Iliocostalis. It originates from the upper ribs and inserts into the transverse processes of the cervical vertebrae.

Function

The Iliocostalis muscle, as part of the Erector Spinae, plays a crucial role in maintaining posture and enabling the movement of the spine. It allows for extension and lateral flexion of the vertebral column and also aids in the process of respiration.

Clinical Significance

Injury or strain to the Iliocostalis muscle can result in back pain, particularly in the lower back. Treatment typically involves physical therapy, pain management, and in some cases, surgery.

See Also

• Erector Spinae
• Muscular System
• Anatomy
• Physiology

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