Despite the continued efforts of medical scientists to reveal the factors accountable for causing multiple sclerosis, the precise reasons why the disorder happens in otherwise healthy persons remain unknown. Although varied factors are suspected to trigger the occurrence of multiple sclerosis (viral or bacterial infections) or to facilitate its progression (genetic dysfunctions and varied external, environmental factors), medical scientists haven't nonetheless reached a consensus concerning the precise causes of the disorder.
Multiple sclerosis may be a kind of autoimmune disorder, involving abnormal activity of the immune system, that turns against healthy body cells rather than fighting against intruding infectious agents. The body cells that are primarily targeted by the immune system within the case of patients with multiple sclerosis are nerve cells. Of course, the autoimmune response of the body does not destroy nerve cells directly; the dysfunctional immune system produces antibodies that destroy myelin, a protein that wraps round the cells of the nervous system, facilitating the communication between the central nervous system (CNS - brain and spinal wire) and peripheral nerves and vice versa.
At 1st, multiple sclerosis causes impairments solely at the level of the central nervous system. In additional advanced stages of progression, multiple sclerosis can involve nearly any innervated region of the body (any half of the body that contains a network of nerves). Without correct medical treatment - that is best when administered in early stages of disease - multiple sclerosis can cause a selection of disabilities and typically even death.
Relying on its patterns of progression, yet because the intensity and frequency of its generated symptoms, multiple sclerosis will be categorized in seven different subtypes. The primary subtype of multiple sclerosis is that the relapsing-remitting multiple sclerosis (RR MS), the most common form of the autoimmune disorder. In keeping with statistics, more than 80 percent of all multiple sclerosis cases are of the relapsing-remitting subtype. This subtype is characterized by phases of symptomatic remission, followed by phases of relapse (characterized by sudden intensification of symptoms). The length of the phases of relapse and remission vary from a patient to another, lasting anywhere from several weeks to many years.
The second subtype of multiple sclerosis - primary-progressive multiple sclerosis (PP MS) accounts for around 20 % of all multiple sclerosis cases. The foremost characteristics of this subtype are gradual progression of the disease, with very short phases of remission. The third multiple sclerosis subtype is like the PP MS subtype and is called secondary-progressive multiple sclerosis (SP MS). Patients with primary-progressive multiple sclerosis have 50 % probabilities to eventually develop secondary-progressive multiple sclerosis.
The fourth subtype of multiple sclerosis is called progressive-relapsing multiple sclerosis (PR MS) and is characterized by gradual progression with frequent phases of symptomatic exacerbation. The fifth multiple sclerosis subtype alternates between the primary-progressive, secondary-progressive and progressive-relapsing types of the disease. The sixth multiple sclerosis subtype is benign multiple sclerosis, characterized by an initial symptomatic flare which will be followed by slow or no progression at all. The seventh and last multiple sclerosis subtype is also very rare. It is known as malignant multiple sclerosis and involves fast progression and terribly intense symptoms. This subtype is in most cases deadly.
Author Resource:-
Dorish Hill has been writing articles online for nearly 2 years now. Not only does this author specialize in Diseases Multiple Sclerosis, you can also check out her latest website about:
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