The lumbosacral joint, also called L5-S1, is a term used to describe a part of the spine. L5-S1 is the exact spot where the lumbar spine ends and the sacral spine begins. The lumbosacral joint ...

A 33 year-old man developed severe low back pain radiating down the left leg. Examination showed an absent left ankle reflex and loss of sensation over the left lateral foot and posterior lateral leg.

Everyone experiences some sort of lower back pain or discomfort. It’s best not to ignore these common but sometimes debilitating aches and pains. Your lower back consists of five vertebrae, labeled L1 ...