Multiple sclerosisMS- Demyelinating disease
Multiple sclerosis is an autoimmune disease that affects the brain and spinal cord (central nervous system).
Causes, incidence, and risk factors
Multiple sclerosis (MS) affects women more than men. The disorder is most commonly diagnosed between ages 20 and 40, but can be seen at any age.
MS is caused by damage to the myelin sheath, the protective covering that surrounds nerve cells. When this nerve covering is damaged, nerve signals slow down or stop.
The nerve damage is caused by inflammation. Inflammation occurs when the body's own immune cells attack the nervous system. This can occur along any area of the brain, optic nerve, and spinal cord.
It is unknown what exactly causes this to happen. The most common thought is that a virus or gene defect, or both, are to blame. Environmental factors may play a role.
You are slightly more likely to get this condition if you have a family history of MS or live in an part of the world where MS is more common.
Symptoms vary, because the location and severity of each attack can be different. Episodes can last for days, weeks, or months. These episodes alternate with periods of reduced or no symptoms (remissions).
Fever, hot baths, sun exposure, and stress can trigger or worsen attacks.
It is common for the disease to return (relapse). However, the disease may continue to get worse without periods of remission.
Because nerves in any part of the brain or spinal cord may be damaged, patients with multiple sclerosis can have symptoms in many parts of the body.
Loss of balance
Numbness or abnormal sensation in any area
Problems moving arms or legs
Problems with coordination and making small movements
Tremor in one or more arms or legs
Weakness in one or more arms or legs
Bowel and bladder symptoms:
Constipation and stool leakage
Difficulty beginning to urinate
Frequent need to urinate
Strong urge to urinate
Urine leakage (incontinence)
Uncontrollable rapid eye movements
Vision loss (usually affects one eye at a time)
Numbness, tingling, or pain
Painful muscle spasms
Tingling, crawling, or burning feeling in the arms and legs
Other brain and nerve symptoms:
Decreased attention span, poor judgment, and memory loss
Difficulty reasoning and solving problems
Depression or feelings of sadness
Dizziness and balance problems
Problems with erections
Problems with vaginal lubrication
Speech and swallowing symptoms:
Slurred or difficult-to-understand speech
Trouble chewing and swallowing
Fatigue is a common and bothersome symptoms as MS progresses. It is often worse in the late afternoon.
Signs and tests
Symptoms of MS may mimic those of many other nervous system disorders. The disease is diagnosed by ruling out other conditions.
People who have a form of MS called relapsing-remitting may have a history of at least two attacks, separated by a period of reduced or no symptoms.
The health care provider may suspect MS if there are decreases in the function of two different parts of the central nervous system (such as abnormal reflexes) at two different times.
A neurological exam may show reduced nerve function in one area of the body, or spread over many parts of the body. This may include:
Abnormal nerve reflexes
Decreased ability to move a part of the body
Decreased or abnormal sensation
Other loss of nervous system functions
An eye examination may show:
Abnormal pupil responses
Changes in the visual fields or eye movements
Decreased visual acuity
Problems with the inside parts of the eye
Rapid eye movements triggered when the eye moves
Tests to diagnose multiple sclerosis include:
Lumbar puncture (spinal tap) for cerebrospinal fluid tests, including CSF oligoclonal banding
MRI scan of the brain and MRI scan of the spine are important to help diagnose and follow MS
Nerve function study (evoked potential test)
There is no known cure for multiple sclerosis at this time. However, there are therapies that may slow the disease. The goal of treatment is to control symptoms and help you maintain a normal quality of life.
Medications used to slow the progression of multiple sclerosis are taken on a long-term basis, they include:
Interferons (Avonex, Betaseron, or Rebif), glatiramer acetate (Copaxone), mitoxantrone (Novantrone), and natalizumab (Tysabri)
Fingolimod (Gilenya )
Methotrexate, azathioprine (Imuran), intravenous immunoglobulin (IVIg) and cyclophosphamide (Cytoxan) may also be used if the above drugs are not working well
Steroids may be used to decrease the severity of attacks.
Medications to control symptoms may include:
Medicines to reduce muscle spasms such as Lioresal (Baclofen), tizanidine (Zanaflex), or a benzodiazepine
Cholinergic medications to reduce urinary problems
Antidepressants for mood or behavior symptoms
Amantadine for fatigue
For more information see:
The following may also be helpful for people with MS:
Physical therapy, speech therapy, occupational therapy, and support groups
Assistive devices, such as wheelchairs, bed lifts, shower chairs, walkers, and wall bars
A planned exercise program early in the course of the disorder
A healthy lifestyle, with good nutrition and enough rest and relaxation
Avoiding fatigue, stress, temperature extremes, and illness
Changes in what you eat or drink if there are swallowing problems
Making changes around the home to prevent falls
Social workers or other counseling services to help you cope with the disorder and get assistance (such as Meals-on-Wheels)
For more information about living with MS, see: Multiple sclerosis - at home
Household changes to ensure safety and ease in moving around the home are often needed.
For additional information, see multiple sclerosis resources.
The outcome varies, and is hard to predict. Although the disorder is chronic and incurable, life expectancy can be normal or almost normal. Most people with MS continue to walk and function at work with minimal disability for 20 or more years.
The following typically have the best outlook:
People who were young (less than 30 years) when the disease started
People with infrequent attacks
People with a relapsing-remitting pattern
People who have limited disease on imaging studies
The amount of disability and discomfort depends on:
How often you have attacks
How severe they are
The part of the central nervous system that is affected by each attack
Most people return to normal or near-normal function between attacks. Slowly, there is greater loss of function with less improvement between attacks. Over time, many require a wheelchair to get around and have a more difficult time transferring out of the wheelchair.
Those with a support system are often able to remain in their home.
Less and less ability to care for self
Need for indwelling catheter
Osteoporosis or thinning of the bones
Side effects of medications used to treat the disorder
Urinary tract infections
Calling your health care provider
Call your health care provider if:
You develop any symptoms of MS
Symptoms get worse, even with treatment
The condition deteriorates to the point where home care is no longer possible