Intervertebral disk, anterior herniation.

Sagittal section of lower spinal column.

Sagittal view of the spinal cord illustrating the directional flow of cerebrospinal fluid through the subarachnoid spaces.

Deep muscles of the back: erector spinae and semispinalis capitis in schematic view.

Posterior view of the skeletal anatomy associated with the spinal column.

Sagittal section of lumbar area of spinal column showing pertinent anatomy. Needle inserted between vertebrae into cerebral spinal fluid (CSF).

Lateral view of the spinal cord and brain.

Posterior view of the spinal cord within its membranes.

Posterior view of the skeletal anatomy of the body (spinal column).

Posterior view of the skeletal anatomy of the spinal column.

Sagittal section of the cervical spine showing the internal anatomy at the apex of the spinal column.

Lateral view of male head resting on pillow with Crutchfield traction tongs in place.

Sagittal view of the spinal column and spinal cord with a meningocele.