Please choose the correct ending to complete the given sentence: Health: [header] How to identify sciatica [title] Recognize a slipped or herniated spinal disc. [step] A herniated or slipped disc is the most common cause of sciatica. [substeps] The spinal column is made of multiple vertebrae, enfolding or containing nerves as a sort of protection.

Ending1: Since spinal discs protect the spine from other potential health problems, they are designed for use in the common activities that occur in high-risk people and children, such as the elderly and those with conditions such as diabetes. These complications come from long exposure to the elements in the presence of conditions such as car collision or radiation exposure. Ending2: Each vertebrae are charged with ions, which charge the spinal column-often known as hydrostatic bladders. These ions release ions that can damage a patient and cause harmful and swift death. Ending3: When a spinal column is lifted up, the vertebrae are exposed to air. It may also be accompanied by pain and numbness, inflammation and its accompanying tingling. Ending4: Between each vertebrae there is a disc made of a fibrous jelly material that ensures the support of the vertebrae and fixes them in place. If the outer part of the jelly ruptures, gel leaks out and escapes between the upper and lower vertebrae, and the disc slips.

Answer format: ending1/ending2/ending3/ending4