It's one of the most feared brain diseases: Alzheimer's. It robs people of their memory bit by bit, has no cure -- and with an aging population, shows no sign of slowing down.
The media is riddled with stories about its causes, symptoms, and prevention. But some of those reports don't tell the whole story.
Here are seven common misunderstandings about Alzheimer’s disease and the truths behind them.
Mental engagement is consistently linked with a decreased risk of a decline in thinking skills. So games, puzzles, and other types of brain training may help slow memory loss and mental decline.
Here are answers to some commonly asked questions about the impact of brain exercises on memory and dementia.
Can brain exercises prevent memory loss or dementia?
Researchers still need to do more study. But there appears to be a consistent link between brain training and a decreased risk of mental decline.
Some studies have shown brain training can have long-lasting positive effects. That was seen, for example, in a study called ACTIVE -- the Advanced Cognitive Training for Independent and Vital Elderly Study.
The study involved 2,802 adults aged 65 and older. Participants attended up to 10 brain-training sessions over a five- to six-week period. The sessions included training in strategies for:
speed of processing information
People who took the training showed improvements in those areas that lasted for at least five years. Even better? This translated into improvements in their everyday lives, such as the ability to manage money and do housework.
But what about prevention of Alzheimer's and other dementias? Does brain training help? A study published in 2010 looked at this very question.
It found that staying mentally active delayed cognitive (thinking) decline. After onset of Alzheimer's, however, mental decline sped up in people who were mentally active. How could this be true? It's possible that being cognitively active initially bolstered the brain, so symptoms didn't show up until later in the disease process after it reached a kind of tipping point.
The silver lining here? People who are mentally active may spend a shorter part of their lives in a state of decline, even if they develop Alzheimer's.
How does brain activity help?
Animal studies have shown that mental stimulation may help protect the brain by:
Decreasing the hallmarks of Alzheimer's, such as increases in certain proteins (plaques and tangles).
Supporting new nerve cell growth.
Prompting communication between nerve cells.
By keeping your brain active with brain exercises or other engagement, you may help build up a reserve of brain cells and connections. You might even grow new brain cells. This is one explanation for the link between Alzheimer's and lower levels of education. Experts think that extra stimulation from education may protect the brain by strengthening brain cell connections.
Of course, neither education nor brain exercises provide an insurance policy against Alzheimer's. But they may help delay the onset of symptoms, prolonging a higher quality of life. And that could be worth a whole lot.