Why You Lose Memory from Brain Injury and Possible Ways to Improve It

This post is for everyone because you never know when you’ll suffer a brain injury. I had a stroke. And with that may come memory loss. I want to say I learn something new every day. In reality, I don't, but pretty close to it. Researching and completing this post over a 2-week period taught me many things about memory, and I'll share them with you. 

Memory is defined as: the faculty of the brain by which information is encoded, stored, and retrieved when needed, vital to experiences, and is the retention of information over time for the purpose of influencing future action. 

Let's get academic for the moment if we haven’t already. This from LumenLearning:

• It is theorized that memories are stored in neural networks in various parts of the brain associated with different types of memory, including short-term memory, sensory memory, and long-term memory.
• Memory traces, or engrams, are physical neural changes associated with memories. Scientists have gained knowledge about these neuronal codes from studies on neuroplasticity.
• Encoding of episodic memory involves lasting changes in molecular structures, which alter communication between neurons. Recent functional-imaging studies have detected working-memory signals in the medial temporal lobe and the prefrontal cortex.
• Both the frontal lobe and prefrontal cortex are associated with long- and short-term memory, suggesting a strong link between these two types of memory. Damage there is monumental.
• The hippocampus is integral in consolidating memories but does not seem to store memories itself.

For all those who know what part of the brain-sustained damage, and you should demand to know by asking your doctor, the following descriptions of the different types of memory will be useful to determine where your loss is according to where it's positioned. 

• Sensory Memory: 

Brain part most relevant: Temporal and  Occipital lobes 
The ability to retain impressions of sensory information after the original stimuli have concluded and the shortest-term element of memory through the five senses of sight, hearing, smell, taste and touch, which are retained accurately, but very briefly. 

• Short-Term Memory:

Brain part most relevant: Pre-Frontal Cortex, Frontal, and Parietal lobes 
Short-term memory is followed hand-in-hand with sensory memory and allows the ability to hold on to a piece of information temporarily in order to complete a task or remember directions, for example.

Long-Term Memory:

Brain part: Frontal and Temporal lobes 
Long-term memory allows the ability to decode information, create associations among an object’s various properties, and develop opinions.

(For Sensory and Long-Term Memory: The Temporal lobe is where lies the hippocampus, a small organ which forms an important part of the limbic system, the region that regulates emotions and events that happened in the past. Needless to say, it's complicated).

And this from McGill U in Canada:
In regard to long-term memory, researchers found two types: 

Declarative memory, aka explicit memory, is what happens when you recall your birthday or what you recall eating last night. You can name and describe each of these remembered things explicitly.

Non-declarative memory, aka implicit memory, is like riding a bike or tying your shoelaces, where you do things, most often motor skills, that do not require the use of language.  

Here's the bottom line: sensory memory leads to short-term memory which leads to long-term memory. If anything is going on where the process is interrupted, you will have some sort of memory issue.

Another study by researchers at the University of Queensland in Australia found out that, relative to short term memory, using magnetic resonance imaging (MRI) machines, people perform tasks requiring them to hold information, such as the location of a flash of light, and the PFC (pre-frontal cortex) becomes active. In terms of the sides of the brain, the left is more involved in verbal memory while the right is more involved in spatial memory, such as recalling where the flash of light happened. 

So can you do anything to get your memory restored? It depends. The amount of damage is certainly important.  

One study said practicing meditation, drinking coffee (albeit before 2pm if you have trouble sleeping at night), eating berries (blueberries are high in flavanoids), chewing gum (because it may improve concentration), and doing exercise (the brain is stimulated) can help improve memory. But the most important? Getting enough sleep.

A study reported on memory- challenged participants to memorize illustrated cards, testing their memory. Then they had a 40-minute break--one group napped and the other stayed awake. After the break, both groups were tested on their memory recall of the cards. Surprisingly, the group who had napped performed better, retaining on average 85 percent of the patterns compared to 60 percent for those who had remained awake.

On the other hand, the brain is the least understood part of the human body. But practicing meditation, drinking coffee, eating berries, chewing gum, doing exercise, and getting enough sleep are harmless, and one or some of those activities may do the trick. 

You know what I always say: if it works, use it.