Roof Of Intervertebral Foramen

Each lamina forms part of the posterior roof of the vertebral arch.

Roof of intervertebral foramen.

The intervertebral foramina which transmit the spinal nerves and the accompanying radicular arteries which supply the spinal cord are on the lateral aspect of the vertebral column. They do so by penetrating the dural sac in an inferolateral direction taking with them an extension of dura mater and arachnoid mater referred to as the dural sleeve see fig. The intervertebral foramen also called neural foramen and often abbreviated as iv foramen or ivf is a foramen between two spinal vertebrae. Cervical thoracic and lumbar vertebrae all have intervertebral foramina.

A number of structures pass through the foramen. Roof inferior vertebral notch of the vertebra above. In the lumbar region where nerve root compression is more common the nerves increase in size from above downwards whereas the. The short often slitlike passage that on both the left and right sides connects the third brain ventricle of the diencephalon with the lateral ventricles of the cerebral hemispheres.

Anterior lower posterolateral aspect of a vertebral body and the intervertebral disc below in the thoracic and lumbar regions. The passage is bounded anteriomedially by the column of fornix and posterolaterally by the anterior pole of the thalamus. The word foramen is the singular form while foramina is the plural form. Anterior wall of neural foramen is intervertebral disk and adjacent endplates.

A pair of spinal nerve roots leaves the dural sac just above the level of each intervertebral foramen. The intervertebral foramen also called the neural foramen is the opening between the vertebrae through which spinal nerve roots travel and exit to other parts of the body. Floor superior vertebral notch of the vertebra below. Nerve roots dorsal root ganglia and dura.

Anterior wall cervical and lumbar regions are the same however because of the size and the fact that the ribs are in the thoracic the thoracic wall will differ. Posterior wall superior articular process of the vertebra below. Posterior wall is facet joint and inferior and superior articular processes. The large opening between the vertebral arch and body is the vertebral foramen which contains the spinal cord.

If the foramina narrow they can put pressure on the nerve roots near them causing pain. The foramina or openings are present between every pair of vertebrae in these areas. Also because the. This sleeve encloses the nerve roots as far as the intervertebral foramen and spinal nerve where the dura.

Roof and floor of neural foramen are formed by pedicles of adjacent vertebrae. The intervertebral foramina allow passage of structures out of and into the vertebral canal.