Wait I’m confused, what’s the question?
With spinal cord injury if you injure the cervical or thoracic areas, it will affect breathing, could cause you to breath with intercostal muscles because diaphragm doesn't function or cause paralysis.
traumatic brain injury can leave injuries to multiple areas. could cause shock, death, heart issues, and so on.
Health is wealthy is true said . if your health is good then you avail do anything which you like . If your health is not good , then you want to do anything but can't due to your health.
Hope this helps good luck :)