part of part of Homo sapiens lumbar vertebra 3 lumbar vertebral arch vertebral arch of third lumbar vertebra 2026-03-19T00:00:00Z A neural arch of the third lumbar vertebra, comprising paired pedicles and broad laminae enclosing the vertebral foramen at the mid-lumbar level within the cauda equina region. It bears the longest transverse processes of any lumbar vertebra, projecting laterally and providing extensive attachment for the psoas major and quadratus lumborum muscles. David Osumi-Sutherland