Surfer's myelopathy

hyperextension of the back and resulting in paraplegia (paralysis below the waist).^[1] During hyperextension, a blood vessel leading to the spine, such as the anterior spinal artery,^[2] can become kinked, depriving the spinal cord of oxygen.^[3] Although the condition derives its name from the fact that the phenomenon is most often seen in those surfing for the first time, it can be caused by any activity in which the back is hyperextended (yoga, pilates, etc.). In some cases, the paralysis is permanent.^[4]

thoracic spinal cord to the conus medullaris.^{[5][clarification needed]} An additional study of twenty-three cases was published in 2013.^{[6][clarification needed}