The 6 Villains Capable Of Breaking Captain Americaâs Shield. Captain Americaâs shield is a classic emblem, a near-indestructible aspect of the suspect that may well survive the Captain himself.
Lower back pain can be caused by a variety of problems with any parts of the complex, interconnected network of spinal muscles, nerves, bones, discs or tendons in the lumbar spine. Typical sources of low back pain include: 1  The large nerve roots in the low back that go to the legs may be irritated.
Some low back pain is caused by damaged intervertebral discs, and the straight leg raise test is useful to identify this cause. In those with chronic pain, the pain processing system may malfunction, causing large amounts of pain in response to non-serious events.