Multiple sclerosis is an autoimmune disease.
The body’s immune system becomes dysfunctional and instead of attacking
foreign bodies it begins to attack the myelin that surrounds the nerve cells.
As a result inflammation is
caused which can lead to the destruction of
myelin in several areas.
Damage to the insulating myelin causes distortion to the nerve impulses. Nerve impulses are messages that are sent from our brains carrying information to areas of the body that one wants to move e.g. arm. If the information cannot pass along the nerve, then the body part is unable to move. Therefore damage to the myelin causes disabilities. (Above cartoon picture of T cells is taken from www.nyhallsci.org/whataboutaids/ whatis/immune/assets/34.jpg)
MS sufferers can lose some of there abilities depending on the area of the body that has been affected. One example of a disability is the inability to walk due to the nerves which control the movement of the legs being damaged.