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MS and Dementia Risk

Mar 17, 2015
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MS and Dementia Risk

MS Cognitive Dysfunction vs Alzheimer’s

There are some similarities between MS-related cognitive difficulties and the brain degradation that comes with Alzheimer’s, but the two conditions differ in a few key areas:

  • Pattern of progression. Cognitive problems with MS may seem like they’re getting worse, but after a certain point they don’t progress further. In contrast, Alzheimer’s continues to damage the structure and chemistry of the brain, and cognitive function will gradually decline as time goes on.
  • Affected area of the brain. Symptoms and severity can depend on the area of the brain that sustains damage. In Alzheimer’s patients, what’s known as the grey matter is most affected (this is where the neurons reside). MS targets brain cells, too, but the “white matter” is the typical target: the myelin that coats brain and nerve cells, and the underlying axons. However, the grey matter begins to suffer in later stages of the disease.
  • Type of memory problems. MS affects people differently, and that means it’s difficult to predict exactly how your memory will suffer. However, in many cases, long-term memory is relatively untouched by the disease – you may forget recently learned names, places, and ideas, but it’s rare to lose long-term memories and face and name recognition. However, Alzheimer’s infamously involves “erased” memories, where your ability to identify faces and names of loved ones falters, and is eventually lost.
  • Attention span changes. Most Alzheimer’s patients become easily distracted early on in the disease. They may wander off in conversation, turn their attention elsewhere abruptly, or seem to ignore what’s going on around them. In MS, attention span can be affected, but in a much milder way, and it doesn’t tend to get progressively worse. Rather, you may have good days and bad days when it comes to focus.
  • Confusion and irritability. Confusion and irritability is another hallmark of early Alzheimer’s disease, but these changes in mood and behaviour are much less pronounced in MS. It can certainly be frustrating trying to recall a specific piece of information to no avail, and you may struggle in conversation when you have difficulties finding words, but rest assured that your MS is not destroying your mental faculties for good.
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Protecting Against Dementia

Unfortunately, there’s a large genetic component in many types of dementia, and you cannot do anything to change your genes. On the other hand, your environment also has a role to play in your long-term mental health, and in some cases, you can reduce your risk of developing dementia by adjusting your lifestyle.

  • Better blood pressure control. In the case of vascular dementia (the second most common type), cognitive malfunction comes from a blockage in blood flow to the brain. Blood vessel conditions, infection of a heart valve, or a stroke can damage blood vessels and interfere with blood flow, but these threats can be eliminated by taking steps to lower your blood pressure and improve your heart health.
  • Head protection. Sometimes repetitive trauma to the head can lead to brain damage and progressive dementia down the road. Generally, this condition is seen in boxers, soldiers, or extreme sports enthusiasts. In many cases, a helmet can muffle the blows enough to protect your brain, so always arm yourself with appropriate head protection.
  • Treat infections quickly. Brain infections like encephalitis and meningitis can attack brain cells and bring on symptoms of dementia, as can diseases like syphilis and Lyme disease – if they go untreated. The key is to fight off the infection before it infiltrates the brain and wreaks havoc on neural communication. In turn, you should be aware of symptoms of common infections, and consult your doctor if new physical symptoms show up suddenly.
  • Drink moderately. Heavy drinking has been linked to an increased risk of developing dementia, but studies show that moderate alcohol consumption (one drink a day for women, and no more than two drinks a day for men) can have a protective effect on brain and heart health. Just keep in mind MS and alcohol consumption don't always agree with one another.

As is the case with many diseases, diet and exercise can play a significant role in your chances of developing a cognitive disease. Not only will a healthy diet prevent clogged arteries and high cholesterol – two predictors of dementia – it will also give you the energy and nourishment you need to counter the weakness and mental stress that comes with MS.

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Angela Finlay
Angela is a freelance writer and blogger committed to learning, understanding and communicating about the matters that affect daily life. From fitness and lifestyle, pregnancy and medical ailments, she has covered a range of health topics throughout her web writing career, contributing to major websites for over three years. She believes that variety is not only the spice of life, but essential for happiness and longevity; as an avid runner, rock climber, artist, and vegetarian cook, her passion for health and vitality stretches into each corner of her life. See all of Angela's articles
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