The root causes of MS are still not known, but scientists have come up with several working theories.
Depending on where in the nervous system these areas of damage are located, all sorts of different signal paths could be affected...
Not every MS patient will exhibit every symptom, and in fact there are many other diseases of the nervous system that have some very similar symptoms.
Not every MS patient will exhibit every symptom, and in fact there are many other diseases of the nervous system that have some very similar symptoms. This can make diagnosing MS very difficult, because all these other diseases must be ruled out before a clear decision can be made that the patient has MS.