The Main Principles Of Spine Problems - Boston Children's Hospital

Rotators Rotation of the lumbar spinal column is caused by the unilateral contraction of muscles that follow an oblique direction of pull; the more oblique the course, the more crucial the rotational effect. The majority of the extensors and lateral flexors follow an oblique course and produce rotation when their main element has been neutralized by villain muscle groups.

As a group, they act to extend the vertebral column. However, when contracted unilaterally, they trigger the trunk to rotate in the contralateral instructions. They are divided into 3 groups: the semispinalis, multifidus, and rotatores lumborum muscles. The rotatores lumborum are little, irregular, and variable muscles connecting the superoposterior part of the transverse process of the vertebra below to the inferolateral border of the lamina of the vertebra above.

Each pair passes anterolaterally around the side of the vertebral body to a position immediately lateral to the intervertebral canal and leads to different branches. The periosteal and equatorial branches provide the vertebral bodies. Back branches of the lumbar arteries get in the intervertebral foramen at each level. They divide into smaller sized anterior and posterior branches, which pass to the vertebral body and the combination of vertebral arch, meninges, and spine, respectively.

Spondylolysis and Spondylolisthesis - OrthoInfo - AAOS

About Lumbar Spinal Cord Injury - Shepherd Center

The Only Guide to About Lumbar Spinal Cord Injury - Shepherd Center

Nutrient arteries from the anterior vertebral canal travel anteriorly and provide most of the red marrow of the central vertebral body. The bigger branches of the spinal branches continue as radicular or segmental medullary arteries, distributed to the nerve roots and to the spine cable, respectively. Up to age 8 years, intervertebral discs have a great blood supply.

As grownups, the discs are generally avascular structures, other than at their periphery. Venous The venous drain parallels the arterial supply. Venous plexuses are formed by veins along the vertebral column both inside and outside the vertebral canal (internal/epidural and external vertebral venous plexuses).  I Found This Interesting  are sporadic laterally however thick anteriorly and posteriorly.

The intervertebral veins anastomose with veins from the cable and venous plexuses as they accompany the spinal nerves through the foramen to drain into the back segmental veins. Vertebral Canal The tubular vertebral canal contains the spine, its meninges, spinal nerve roots, and blood vessels supplying the cable, meninges, vertebrae, joints, muscles, and ligaments.