Billy's condition is the result of:
- a disruption in his myelin sheaths.
Multiple sclerosis
This disease of the nervous system ocurrs when the myelin sheaths are affected, in this affects the brain and the spinal cord, slowing down the signals obtained by the brain and the answers of this.
Multiple sclerosis can cause coordination and balance problems, in the same form that muscular weakness, by this reason, Billy has troubles walking and running.
If you want to learn more about Multiple Sclerosis, you can visit the following link: https://brainly.com/question/25038571?referrer=searchResults
