part of part of Homo sapiens lumbar vertebra 5 lumbar vertebral arch vertebral arch of fifth lumbar vertebra 2026-03-19T00:00:00Z A neural arch of the fifth lumbar vertebra, formed by the thickest, most robust pedicles of the lumbar column and broad laminae enclosing the vertebral foramen at the lumbosacral junction. Its transverse processes are large and pyramid-shaped, providing the origin of the strong iliolumbar ligaments that anchor L5 to the iliac crests. David Osumi-Sutherland