lumbar spine

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1. a thornlike process or projection; called also acantha and spina.
2. the rigid bony structure in the midline of the back, composed of the vertebrae; called also backbone, spinal column, and vertebral column.

The spinal column is the axis of the skeleton; the skull and limbs are in a sense appendages. The vertebrae also provide the protective bony corridor (spinal canal) through which the spinal cord passes; they can move to a certain extent and so give flexibility to the spine, allowing it to bend forward, sideways and, to a lesser extent, backward. In the areas of the neck and lower back, the spine also can pivot, which permits the turning of the head and torso.

There are usually 24 movable vertebrae and nine that are fused together. The topmost are the seven cervical vertebrae, which form the back of the neck, supporting the skull. The head turns from side to side by means of a pivotal motion between the two highest vertebrae. Below these are the 12 thoracic vertebrae, the supports on which the ribs are hinged, and then the five lumbar vertebrae, the largest movable vertebrae (the cervical are the smallest). Below the lumbar vertebrae, the spine terminates with two groups of vertebrae fused into single bones: the sacrum, composed of five vertebrae, and the coccyx, composed of four vertebrae. Viewed from the side of the body, the spine has the shape of a gentle double S curve.
Malformations of the Spine. Of the various types of spinal malformations, some are congenital and others the result of postural defects or injuries. spina bifida is congenital. kyphosis may occasionally be congenital but is more often caused by one of the diseases that attack the structure of the bones. The most common of these is pott's disease, or tuberculosis affecting the vertebrae and soft tissues of the spine. Another is osteitis deformans, a type of bone inflammation in which parts of the bone are replaced by softer tissue. scoliosis is a curvature of the spine toward one side.
cervical spine that portion of the spine comprising the cervical vertebrae.
lumbar spine that portion of the spine comprising the lumbar vertebrae.
thoracic spine that part of the spine comprising the thoracic vertebrae.

lumbar spine (L-spine)

that portion of the spine comprising the lumbar vertebrae.

Lumbar spine

The segment of the human spine above the pelvis that is involved in low back pain. There are five vertebrae, or bones, in the lumbar spine.
Mentioned in: Low Back Pain
References in periodicals archive ?
21) That study was conducted on an intact lumbar spine model, suggesting that iatrogenic spondylolysis would only further enhance the vulnerability of the spine to instability.
It turns out that each movement has positive and negative effects upon the lumbar spine.
Moreover, we found that wearing lumbar corsets increased the rotational motion of the hip joint while reducing the rotation of the lumbar spine.
The potential for highly flexed postures to damage the lumbar spine becomes more evident when repetitively lifting and/ or lowering.
4% greater gain in lumbar spine BMID than with placebo, while those with a testosterone of 250 ng/dL or above had a similar 4.
Therefore, we derived lumbar spine angles from the relative orientation based on the core spine axis.
The neural elements of the lumbar spine below the L1-L2 disc are usually floating spinal nerve rootlets (cauda equina).
This current report provides additional compelling evidence demonstrating that 54 mg of genistein per day, along with 500 mg of calcium and 400 IU of vitamin D for two years, can increase the BMD of the lumbar spine and femoral neck.
of Chicago Hospitals) the text contains 166 chapters covering system used in the craniovertebral junction, the anterior cervical spine, the posterior cervical spine, the cervicothoracic junction, the anterior thoracic and thoracolumbar junction, the posterior thoracic and thoracolumbar junction, the anterior lumbar spine, the posterior lumbar spine, and the lumbosacral junction and sacrum.
Purpose: To assess the feasibility of utilizing an axial loading device on individuals with acute low back pain and to assess the sagittal plane kinematics and posterior disc bulge of the lumbar spine during axial loaded MRI in persons with acute low back pain.
Four years later, and as a result of acute onset of radicular symptoms, a lumbar spine magnetic resonance imaging scan was performed, revealing an epidural cystic lesion.