Dr Wise wrote a great article about this - any spinal problem can cause thermoregulation problems, and it's more likely if your impairment is in the upper body. In addition, many drugs that people with spinal conditions take, including anti-spastics, contribute to the problem. If your body temp ever drops below 90 degrees, you need to go to the hospital immediately to get heated up, and beware becoming really stupid in the 93-94 range.