Spinal (lumbar) canal stenosis
Spinal canal is located in the back of the spine and houses spinal nerve. In spinal (lumbar) canal stenosis, this spinal canal harrows and compresses spinal nerve. There are two major reasons for narrowing of spinal canal. One is accumulation of calcium caused by degeneration ( in other words, the bone grows), and other is compression of spinal canal caused by herniated disc.