Finding New Pathways to Cognitive Resilience

Imagine a woodland, blanketed with knee-high snow. On foot, you need to cross. Those first few crossings are tough, lifting your feet high, then crushing the snow underneath. With repetition, you’ve built a path and your crossing is made faster and easier. One day an interesting birdsong catches your attention and you stray from your worn path, starting a new one. 

For several days, you follow the new path hoping to catch a glimpse of the elusive bird. Now you have two worn paths. Every so often, exploring the reaches of the woodlands, you create and then retrace new paths. A large tree breaks under the weight of the snow, completely blocking your first, main path. Because you branched out, explored new areas, you have options.

Applied to the brain in a general way, this scenario represents the real-world value of neuroplasticity. Our brain function relies on fast and accurate communication of sensory inputs and responses, traveling through chains of brain cells (neurons) where chemical neurotransmitters serve as the language of that communication. Well-used neuron chains are in effect the snow-packed paths in the woodland.

Neuroplasticity describes how experience and environment trigger the brain to form new connections and pathways. Should a brain injury occur - stroke, trauma, or other - neuroplasticity allows for workarounds that can compensate for impaired function.  This capacity is crucial to rehabilitative therapies. 1 

But neuroplasticity is also key to managing risk and slowing the progression of neurocognitive disorders, including those resulting in Dementia.  New and novel experiences, no matter the type, lay down new pathways connecting different areas of the brain. These pathways allow for learning a new task or committing to memory the sights, sounds, and sensations of a new destination. They open up a network of routes for neuro-communication that can be used for a range of functions much broader than the original task or experience would suggest.

While repetition builds stronger pathways, a recent investigation suggests that prolonged experiences such as physical exercise or stress can change the language of communication between neurons, substituting one neurotransmitter for another. 

A study of mice running in a wheel demonstrated both the switch-up in neurotransmitters and an overall improvement in coordination and motor learning.2 Not only did they run faster, but the mice also had an improved ability to walk a tightrope and balance on a rotating rod. 

This process, the neurotransmitter switch, is of interest to researchers examining mechanisms behind stress-induced diseases. It will also be important as we learn how targeted exercise might be used as a treatment for other diseases. 

Another related area of study with great potential is neurogenesis- the creation of new neurons.  Neurogenesis is regulated by neurotransmitters – think of the study of mice in the running wheel. While neurogenesis is slowed by stress and aging, rates can be accelerated by physical exercise and brain exercise, for example learning new concepts or skills. Of course, many other molecular mechanisms also affect the process of neurogenesis.3  

Neuroplasticity is as complex as it is crucial to our cognitive health. A technical summary would be that curiosity, physical activity, and novel experiences enhance neuroplasticity through mechanisms such as the neurotransmitter switch and neurogenesis. A practical summary though - while the main path may be easy, it would serve us well to tread more paths. Even better, use different tools like skis, snowshoes, or crampons, and skills like using a bird guide, binoculars, and journaling your experiences. 

1 Ackerman, Courtney E., MA. What is Neuroplasticity – A Psychologist Explains. Accessed 4/15/2020 from https://positivepsychology.com/neuroplasticity/

2 University of California Television. 30 June 2017.  “Neuroplasticity: Our Adaptable Brain with Nick Spitzer”. [Show ID: 32521] Accessed 15 April 2021 from https://www.youtube.com/watch?v=DXA_iTG3XSM

3 Ming, Guo-Li, and Hongjun Song. “Adult neurogenesis in the mammalian brain: significant answers and significant questions.” Neuron vol. 70,4 (2011): 687-702. doi:10.1016/j.neuron.2011.05.001 Accessed 15 April 2021 from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3106107/

Contributor: Karen R. Ogden, team member, Dementia Society of America.

The opinions expressed by contributing authors are not necessarily the opinions of the Dementia Society, Inc. We do not endorse nor guarantee products, comments, suggestions, links, or other forms of the content contained within blog posts that have been provided to us with permission, or otherwise. Dementia Society does not provide medical advice. Please consult your doctor. www.DementiaSociety.org

Read! Exercise for Your Brain

Most people have an innate desire to learn, and language is the primary tool for learning. Reading is an important mechanism for the delivery of information to the brain to be solidified as acquired knowledge. Reading is critical for your own personal and cultural development because it relates to so many factors in your life. The benefits are broad and significant.

First, the mental stimulation of reading is vital for brain health. It is quite literally exercise for the brain. Synapses fire, neurotransmitters are released, and hormones begin circulating. Reading material that evokes an emotional response actually stimulates the brain to produce hormones specific to the physical expression of those feelings. 

Next, memory is improved by reading. When you read a novel, for it to make sense, you must remember different characters and plot elements. Keeping all of these things in play has your short term memory working hard. This also requires, and so with repetition improves, the focus and concentration you need to follow the action through the course of the story. 

And don’t forget that the escapism offered by novels can also be an excellent stress management tool.

Analytical skills are also engaged through reading. Stimulating novels keep you involved - trying to figure out where the story is going. Technical books, however, require that you reason out how all the different pieces of information come together as a concept, procedure, or system. 

Reading also improves writing ability as vocabulary and variations in sentence structure are introduced or reinforced.  

The bottom line is that reading to learn something new is better for your brain than simply reading for entertainment. Still, even an entertaining novel offers the mental stimulation you wouldn't find passively watching TV or streaming media.

Contributor: Dr. Michael Trayford is a Board-Certified Chiropractic Neurologist and Founder of APEX Brain Centers in Asheville, NC. For more information, please visit https://apexbraincenters.com/cognitive-decline-asheville-nc/.

The opinions expressed by contributing authors are not necessarily the opinions of the Dementia Society, Inc. We do not endorse nor guarantee products, comments, suggestions, links, or other forms of content contained within blog posts that have been provided to us with permission, or otherwise. Dementia Society does not provide medical advice. Please consult your doctor. www.DementiaSociety.org