Multifidus muscle

Multifidus muscle is a group of muscles located along the spine. They are one of the smallest yet most "powerful" muscles that give support and stability, and aid in movement of the spine.

Etymology

The term "multifidus" is Latin in origin, with "multi-" meaning "many" and "-fidus" meaning "split". This refers to the way the muscle is divided into a number of different parts along the spine.

Anatomy

The multifidus muscle is a series of muscles attached to the spinal column. These muscles are located in the groove on either side of the spinous processes, from the sacral region to the axis. The multifidus is a very thin muscle. Deep in the spine, it spans three joint segments, and works to stabilize the joints at each segmental level.

Function

The primary functions of the multifidus muscle include extension and rotation of the spine, and lateral flexion. It also plays a role in postural adjustment and control. The multifidus muscle is one of the most important muscles in the support and control of the spine and pelvis.

Clinical significance

The multifidus muscle is often targeted in physical therapy for individuals with back pain. Studies have shown that people with back pain usually have atrophied or less functional multifidus muscles. Strengthening the multifidus muscle is often a focus of treatment for patients with spinal stenosis, spondylolisthesis, and other conditions that cause chronic back pain.

Related terms

• Erector spinae muscles: A group of muscles that straighten and rotate the back.
• Transversospinales: A group of muscles that include the multifidus, rotatores, and semispinalis muscles.

See also

• Spinal muscle
• Back pain
• Physical therapy

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