L5-S1 consists of the last bone in the lumbar spine (low back), called L5, and the triangle-shaped bone under it, known as the sacrum. The sacrum is made of five fused bones—S1 is at the top ...

Understanding spinal fusion means knowing the procedure, recovery process, potential risks, and how it can help treat chronic ...

The L5-S1 is the lowest segment of the spine. A study found that among athletes, only 20% returned with an L4 fusion while 73% returned with a T12 fusion which is only 4 spots higher.

The health-care facility is one of the first in the area to offer the surgery, according to a recent announcement.

A spinal tap (lumbar puncture) may help confirm a multiple sclerosis diagnosis. Here’s what you should expect from the procedure.