Osteopenia is the thinning of bone mass. While this decrease in bone mass is not usually considered "severe," it is considered a very serious risk factor for the development of osteoporosis.

Osteoporosis is the most common bone disease in the United States and developed countries.

While there are many causes of back pain, the most common cause is a disorder of the lumbar intervertebral discs.

A common cause of lower back and leg pain is a lumbar ruptured disc or herniated disc.

Approximately 80% of the population is plagued at one time or another by back pain, especially lower back pain.

Spinal stenosis is like the lime build-up on the inside of a garden hose. Over time, it narrows the diameter of the hose, just as spinal stenosis narrows the spinal canal.

A common cause of low back and leg pain is lumbar spinal stenosis. Spinal stenosis most often occurs in adults over 60 years old. Pressure on the nerve roots is equally common in men and women.

Lumbar spinal stenosis is a common cause of low back, buttock and leg pain in adults 50 years and older.

As we age, our body degenerates with time. However, some people have a higher risk of certain degenerative conditions due to a genetic bias.

Zygapophysial joints (also known as facet joints or z-joints) are located on the back (posterior) of the spine on each side where two adjacent vertebrae meet.