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The lumbar area of the spine is better known as the lower back. The lamina is a part of each vertebra. A lumbar laminectomy is the surgical removal of the lamina or part of the lamina on one or more of the vertebrae in the lower back. This is usually done to relieve pressure on nerves that may become inflamed from pressure caused by a narrowed spinal canal (spinal stenosis), bone spurs, or a herniated disc. Once the lamina is removed, the surgeon can then access the spinal canal and remove the source of irritation or pressure.