What is the most common direction the nucleus pulposus will move if an intervertebral disc herniates

Expert Solution

ANSWER

POSTEROLATERAL DIRECTION

EXPLANATION

The cushioning and connective tissue between vertebrae is called intervertebral disc. The disc consists of an annulus fibrosus, a nucleus pulposus and two cartilaginous endplates.This intervertebral disc may get herniated as a result of excessive stress to the vertebrae or due to degenerative processes.

The nucleus pulposus is the soft, gelatinous central portion of the intervertebral disc. During posture changes it moves within the disc. In the normal disc, flexion of an intervertebral disc accompanied by posteriorly directed migration of the nucleus pulposus within the disc. Extension tends to be accompanied by an anteriorly directed migration and frequently communicates with the epidural space and surrounding structures.

During intervertebral disc herniation ,displacement of the content of the intervertebral disc (the pulpous nucleus) through its external membrane (the fibrous ring)occurs. Both the deformed annulus and the gel-like material of the nucleus pulposus can be forced laterally or posteriorly, distorting local muscle function and putting pressure on the nearby nerves.

Sydney Mullin answered 1 year ago

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