New Scientist article What does the brain do when it is not used?
Why does it remember?
How do you learn new things?
These are the questions that scientists have been asking themselves ever since the first brain scans were recorded.
Brain injury is a common medical condition and the first scans were done at the beginning of the 20th century, when scientists were looking for a link between brain damage and dementia.
Nowadays, the answer is: almost nothing.
In fact, some researchers are now trying to answer some of the same questions with a more comprehensive view of the brain, including an analysis of all the brain regions involved in learning and memory.
A new paper in the Journal of Neurosurgery says that brain injury may not be as important as once thought.
Instead, the new findings suggest that learning and learning abilities are a more complex process than previously thought, suggesting that it is more complex than previously believed.
What’s more, this may have implications for the development of dementia.
If so, the research could help explain why people with dementia have different cognitive and neural patterns than those without.
The new paper, led by Prof Timo Välkänen of the Karolinska Institute, describes what it found in mice that were subjected to traumatic brain injury (TBI).
These mice were then placed into groups and asked to learn the same tasks, such as jumping and navigating a maze, and perform them again a few hours later.
This repeated activity may have affected the way the mice’s brains function.
But there was no difference between mice that had been injured in the lab and those that were not.
“We can’t tell from this study what happens in the brain of someone who’s not injured, because we have no way of knowing that person’s brain chemistry or brain structure,” says Prof Vällkäinen.
“But from what we’ve seen so far, it appears that this sort of repetitive activity in the mouse brain does not have an impact on brain structure, and that’s a big deal.”
The research is the first to suggest that repetitive activity, rather than damage, is the key to the changes in brain function.
Previous studies had shown that repeated brain activity does not affect brain function in the brains of humans, but the researchers have yet to prove that it works in mice.
This is a big step forward, but is it sufficient to explain the difference between people with and without dementia?
If you or someone you know is at risk of developing dementia, talk to your GP or pharmacist.
You may want to take medication that may help reduce the effects of TBI.
If you are still having problems following a new treatment, talk with your doctor or nurse about the best way to proceed.
It may help to have your brain scanned.
The brain is more flexible and resilient than previously understood The researchers also tested a second hypothesis.
This was that repetitive brain activity could be an underlying factor in people with a diagnosis of Alzheimer’s disease (AD), which is a degenerative disease of the developing brain that has been linked to changes in the structure of the hippocampus, the part of the memory system.
They found that this was the case, as mice were more susceptible to TBI and showed more changes in hippocampus structure than mice without dementia.
The researchers say that their findings are consistent with a second model of Alzheimer�s disease, where repetitive brain damage leads to a change in the function of the hippocampal system, possibly through changes in neurotransmitter systems.
These changes can affect memory and learning.
However, the researchers say they have not yet been able to replicate this model with other diseases.
The paper concludes that repetitive stimulation of the mouse hippocampus, like those seen in other experiments, could not explain the differences in cognitive and neurochemical function seen in people who are not being affected by TBI, but may be able to explain some of them.
But Prof Vålkahne hopes the new study will lead to further studies in humans, because the findings are similar in humans and mice.
It will be interesting to see if there is a similar pattern in other animals, as humans have had similar studies, he says.
“The key question we’re trying to tackle is, ‘how does this impact on cognition?’
And I think that’s going to be a big focus of future research.”
What are the risks and benefits of a TBI?
Brain injury can be very serious.
It can cause a number of things that are very serious: stroke, coma, death and long-term brain damage.
Some people have experienced mild cognitive impairment or even dementia, and are able to function normally.
But if the damage is severe, people may lose their sense of identity, become delusional, lose interest in social relationships, lose their jobs, or even become unable to function independently.
A lot of the work on TBI is still in its early stages.
There are some very important questions to answer, but it’s a difficult problem to tackle, says Prof