Lumbar radiculopathy is a back disorder caused by a pinched nerve in the lumbar, or lower back, area of the spine. Usually, lumbar radiculopathy occurs in men who are in their forties and in women who are over 50 years old. In many cases, it is the result of hard physical labor.
The spine is made up of 33 individual bones called vertebrae. These are separated by intervertebral discs. A typical lumbar vertebra consists of a body and a vertebral arch, which has several processes for articular and muscular attachments.
Each spinal disc has a tough outer shell called the annulus. The center portion of the disc, the nucleus, contains a gel-like substance. The spinal nerves branch off the spinal cord in pairs and travel through small openings between the vertebrae called intervertebral foramina.