Thoracolumbar fascia
Thoracolumbar fascia is a complex, three-layered membrane that plays a crucial role in the human body's biomechanics. It is located in the lumbar area and extends to the thoracic region, hence its name. The thoracolumbar fascia is involved in various functions, including load transfer across the sacroiliac joint, movement of the trunk and lower limbs, and pain propagation.
Etymology[edit | edit source]
The term "thoracolumbar fascia" is derived from the regions it spans: the thoracic and lumbar areas of the spine. "Thoracic" comes from the Greek word "thorax," meaning chest, while "lumbar" is derived from the Latin "lumbus," meaning loin. "Fascia" is a Latin term meaning band or bandage, referring to the connective tissue that envelops, separates, or binds together muscles, organs, and other soft structures of the body.
Anatomy[edit | edit source]
The thoracolumbar fascia is a deep investing membrane which covers the deep muscles of the back of the trunk. It is made up of three layers: the anterior, middle, and posterior layers. The anterior layer covers the quadratus lumborum muscle, the middle layer covers the erector spinae muscle, and the posterior layer covers the latissimus dorsi muscle.
Function[edit | edit source]
The thoracolumbar fascia plays a significant role in the biomechanics of the body. It helps in the transfer of loads from the upper body to the lower body and vice versa. It also provides attachment points for several muscles, including the latissimus dorsi, gluteus maximus, and the transversus abdominis. The thoracolumbar fascia is also involved in the movement of the trunk and lower limbs.
Clinical significance[edit | edit source]
The thoracolumbar fascia has been implicated in the propagation of low back pain. Studies have shown that the fascia is often thicker and contains more collagen in individuals with chronic low back pain. It is also a potential site for the development of myofascial trigger points, which are hyperirritable spots in the fascia associated with a hypersensitive palpable nodule in a taut band.
Related terms[edit | edit source]
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