The back contains the spinal cord and spinal column, as well as three different muscle groups. Many conditions and injuries can affect the back. Learn more here.

Spinal nerve: The posterior and anterior roots come together to create a spinal nerve. There are 31 pairs of spinal nerves. These control sensation in the body, as well as movement.

Sometimes, osteoarthritis produces spurs that put pressure on the nerves leaving the spinal column. This can cause weakness and pain in the arms or legs. Who Gets Osteoarthritis of the Spine?