Kidney Stones, also known as renal calculi, are hard masses that separate urine from the urinary tract. These stones can occur anywhere in the urinary tract, including the kidneys, bladder, ureters and urethra.
This fluid is called the cerebrospinal fluid (CSF). When it leaks out, the pressure around the brain and spinal cord drops. Causes of leakage through the dura include: 1  Certain head, brain, or spinal surgeries.  Head injury.
The spinal cord is the link between the brain and the rest of the body; when healthy, it carries messages back and forth that facilitate motor control and sensory function. A spinal cord injury occurs when the impact of a car accident causes a blow to the spine and damages the fragile bundle of nerves within it. Spinal cord injuries impair the brain's ability to communicate with the body, resulting in paralysis and lack of sensation in all or part of the body.