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Definition

A laminectomy is a surgical procedure in which the surgeon removes a portion of the bony arch, or lamina, on the dorsal surface of a vertebra, which is one of the bones that make up the human spinal column. It is done to relieve back pain that has not been helped by more conservative treatments. In most cases a laminectomy is an elective procedure rather than emergency surgery. A laminectomy for relief of pain in the lower back is called a lumbar laminectomy or an open decompression.

Purpose

Structure of the spine

In order to understand why removal of a piece of bone from the arch of a vertebra relieves pain, it is helpful to...