Laminectomy is a spine operation to remove the portion of the vertebral bone called the lamina

Lamina of the vertebral arch

The laminæ are two broad plates, extending dorsally and medially from the pedicles, fusing to complete the roof of the vertebral arch.Their upper borders and the lower parts of their anterior surfaces are rough for the attachment of the ligamenta flava....

. There are many variations of laminectomy. In the most minimal form small skin incisions are made, back muscles are pushed aside rather than cut, and the parts of the vertebra adjacent to the lamina are left intact. The traditional form of laminectomy (conventional laminectomy) excises much more than just the lamina; the entire posterior backbone is removed, along with overlying ligaments and muscles.