Multifidus
Multifidus (pronunciation: mul-ti-fi-dus) is a muscle located along the spine. It is one of the smallest yet most "powerful" muscles that gives support to the spine. It is also known for its role in maintaining the body's posture and spinal stability.
Etymology
The term "Multifidus" originates from Latin, where "multi-" means "many" and "-fidus" means "split". This is in reference to the way the muscle is divided into a number of different parts along the spine.
Anatomy
The Multifidus muscle spans three joint segments, and works to stabilize the joints at each segmental level. The stiffness and stability makes each vertebra work more effectively, and reduces the degeneration of the joint structures. These small muscles are very rich in proprioceptors, enhancing the body's proprioceptive and postural control.
Function
The primary functions of the Multifidus muscle include extension and rotation of the spine, and lateral flexion of the spine to the same side. It also plays a crucial role in maintaining the posture and curvatures of the spine.
Clinical Significance
In clinical practice, a weak Multifidus muscle is often associated with low back pain. Strengthening of the Multifidus and other deep trunk muscles is often a focus of physical therapy and exercise for people with low back pain.
Related Terms
External links
- Medical encyclopedia article on Multifidus
- Wikipedia's article - Multifidus
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