Tags: Anatomical Structure.
The lumbosacral joint is a joint of the body between the last lumbar vertebra and the first sacral segment of the vertebral column. In some ways calling it a joint (singular) is a misnomer since the lumbosacral junction includes a disc between the lower lumbar vertebral body and the uppermost sacral vertebral body as well as two lumbosacral facet joints (right and left zygapophysial joints).