As our life expectancy continues to increase, one of the biggest fears of our senior citizens is that they may physically live longer than their brain functions.

This thought is being fueled by numerous press reports about the increase in Alzheimer’s disease and other dementias. Dementia generally relates to loss of cognitive function. Alzheimer’s is a type of dementia, but there are many others, like senile (aging) dementia and dementias associated with other neurologic diseases.

The good news is that the evolving neuroscience shows that there are things we can do to preserve and even enhance our cognitive ability through the life span.

[lz_ndn video=32696117]

The concept of neuroplasticity shows that our brains can recover after injuries and strokes as well as, in some cases, improve brain function in the face of chronic neurologic disease.

In my book, “30 Days to a Better Brain,” I outline the mind, body and spirit approach to preserving and enhancing cognitive function as practiced at Canyon Ranch.

As we age, we have learned the value of healthy eating and remaining physically active through the life span. Each of these factors is an essential variable in overall health to include brain health and cognitive vitality.

Related: Boost Your Brain, Add Years to Your Life

We also know that if we don’t stay physically active, our muscles will atrophy and as we weaken, we lose our ability to actually participate in life activities and we become more vulnerable to falls and injury.

The brain also needs continuing challenges to stay vital as well and to prevent atrophy from minimal activity.

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So the brain needs a “brain gym” — that is, new information and challenges for a “workout,” so that brain nerve cells are challenged and preserved and new brain neural networks are made to capture and store the new information.

[lz_bulleted_list title=”Early Signs of Alzheimer’s” source=”http://www.alz.org”]Memory loss that disrupts life|Challenges with planning or solving problems|Difficulty with familiar tasks|Confusion with time or place|New problems with words|Decreased or poor judgment|Misplacing things|Changes in mood, personality[/lz_bulleted_list]

No matter your age, even centenarians can benefit from learning new things — from a new language to playing a musical instrument or simply staying socially engaged with active stimulating conversation.

Related: John McCain’s Brain Cancer: What Is Glioblastoma?

Dr. Richard Carmona is the 17th surgeon general of the United States and president of Canyon Ranch Institute. He is the author of “30 Days to a Better Brain.” This Fox News piece is used by permission.

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(photo credit, homepage image: National Cancer Institute, Wikimedia; photo credit, article image: Mikael Häggström, Wikimedia)