Lumbosacral joint

Lumbosacral joint is a significant part of the human skeletal system, located in the lower back region. It is the joint connecting the last lumbar vertebra and the first sacral segment (S1). The lumbosacral joint plays a crucial role in the movement and support of the upper body.

Etymology

The term "lumbosacral" is derived from two Latin words: "lumbus" meaning loin and "sacrum" referring to the sacred bone. The sacrum was considered sacred by the Romans as they believed it ensured life after death.

Anatomy

The lumbar vertebrae are the largest segments of the movable part of the vertebral column, and are characterized by the absence of the foramen transversarium within the transverse process and by the absence of facets on the sides of the body. The sacrum, on the other hand, is a large, triangular bone at the base of the spine and at the upper and back part of the pelvic cavity, where it is inserted like a wedge between the two hip bones. Its upper part connects with the last lumbar vertebra, forming the lumbosacral joint.

Function

The lumbosacral joint allows for considerable movement, including flexion, extension, side bending, and slight rotation. This flexibility allows for movements such as bending forward, backward, and side to side. The joint also bears the weight of the body, transferring it from the spine to the lower limbs.

Clinical significance

Conditions affecting the lumbosacral joint can cause lower back pain. These conditions can include Lumbosacral spondylolisthesis, Lumbosacral disc injuries, and Lumbosacral transitional vertebrae. Treatment for these conditions can range from physical therapy and medication to surgery in severe cases.

See also

• Lumbar vertebrae
• Sacrum
• Vertebral column
• Lower back pain

References

Lumbosacral joint Resources
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