Spondylolisthesis: A issue the place You will find there's modest, slim section in the vertebra that acts for a bridge between the upper and lower facet joints, that has knowledgeable a worry fracture or crack. Illustrations of the straight leg increase test clearly show (a) the individual’s leg lifted (arrow), https://www.theorthopaedicandpainpractice.com/lower-back-and-buttock-pain/