A 28 year-old man developed low back pain radiating down the right leg. Examination showed an absent right ankle reflex, weakness of right knee flexion and ankle plantar flexion, and patchy loss of ...

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.

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 ...