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).