herniate

To protrude through an abnormal bodily opening.

Abnormal protrusion of an organ or other body structure through a defect or natural opening in a covering membrane, muscle or bone. See also hernia and individual anatomical sites for hernia.

• nucleus pulposus h. — rupture or prolapse of the nucleus pulposus into the spinal canal, or against the spinal cord. See also intervertebral disk disease.
• transtentorial h. — downward displacement (caudal transtentorial herniation; uncal herniation) of the medial brain structures through the tentorial notch by a supratentorial mass, exerting pressure on the underlying structures, including the brainstem.
• uncal h. — transtentorial herniation.