Posts Tagged ‘Research’

Exercise Builds Better Brains

January 21st, 2010

I knew it!!!

I knew there was a reason my Health Habits readers are so much smarter than the average person on the street.

It turns out that all of that exercise you do improves brain health and actually promotes the growth of new brain cells.

The Research

In a new study (published here), researchers found that voluntary running caused lab mice to grow new brain cells in the region of the brain (hippocampus) associated with memory and spatial navigation.

The 105-day study included two groups of mice. One group was allowed unlimited access to an exercise wheel and ran an average of more than 20 km (12 miles) a day. The other group of mice weren’t allowed to exercise.

Tests showed that the mice in the exercise group were better able to distinguish between memories of similar things. This is likely due to the additional brain cells generated by exercise, the researchers said.

“Keeping similar memories distinct is an important part of having a good memory,” said study senior author Timothy Bussey of Cambridge University. “It is this aspect of memory that is improved by exercise, our study shows.

The human equivalent might be remembering which car parking space you have used on two different days in the previous week. It becomes difficult to distinguish memories when events are similar.”

New brain cells…that has to be good.

But wait,  it gets even better.

It’s not just the physical exercise that you do.

Another group of brain researchers believe that it’s a combination of increased blood flow (via exercise therapy) and increased neural activity (problem solving, learning new tasks, reading Health Habits, etc…) that results in both the creation and retention of new brain cells at any age.

So, when you go online to research how to get healthy & fit, you’re pushing your brain to grow & keep new brain cells.

But wait, it can get even better than that.

Supplementing your diet with Omega 3 fatty acids has been shown to improve the cellular function of your brain cells.

Conclusion

  • Physical Exercise = New Brain Cells
  • Mental Exercise = Retention of those New Brain Cells (the use it or lose it theory)
  • Omega 3 fatty acids via fish oils = Better Functioning Brain Cells

So, the next time some non-exercising, non-thinking, non-fish oil slurping mouth breather tells you how smart you are, you can tell them that it’s all due to Health Habits.

You’re welcome

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Fibromyalgia: A New Test Leads To A Cause And Maybe A Cure

November 3rd, 2008

For years and years and years and years, people suffering with fibromyalgia have faced a battle on two fronts.

  1. They battle chronic pain and all of the associated physical, mental and emotional problems that come with chronic pain.
  2. They fight a public and medical perception that fibromyalgia is not a real medical condition. That the pain is all in their heads.

A new study, published in the November issue of the Journal of Nuclear Medicine, may help fibromyalgia patients on both battle fronts.

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The Study

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Using single photon emission computed tomography (SPECT), researchers in France were able to detect functional abnormalities in certain regions in the brains of patients diagnosed with fibromyalgia, reinforcing the idea that symptoms of the disorder are related to a dysfunction in those parts of the brain where pain is processed.

“Fibromyalgia is frequently considered an ‘invisible syndrome’ since musculoskeletal imaging is negative,” said Eric Guedj, M.D., and lead author of the study. “Past imaging studies of patients with the syndrome, however, have shown above-normal cerebral blood flow (brain perfusion) in some areas of the brain and below-normal in other areas. After performing whole-brain scans on the participants, we used a statistical analysis to study the relationship between functional activity in even the smallest area of the brain and various parameters related to pain, disability and anxiety/depression.”

In the study, 20 women diagnosed with fibromyalgia and 10 healthy women as a control group responded to questionnaires to determine levels of pain, disability, anxiety and depression. SPECT was then performed, and positive and negative correlations were determined.

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The Results

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The researchers confirmed that patients with the syndrome exhibited brain perfusion abnormalities in comparison to the healthy subjects.

Further, these abnormalities were found to be directly correlated with the severity of the disease.

An increase in perfusion (hyperperfusion or excessive blood supply) was found in that region of the brain known to discriminate pain intensity, and a decrease (hypoperfusion or inadequate blood supply) was found within those areas thought to be involved in emotional responses to pain.

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Conclusions

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In the past, some researchers have thought that the pain reported by fibromyalgia patients was the result of depression rather than symptoms of a disorder. This study strongly refutes that belief.

According to the lead researcher, “Interestingly, we found that these functional abnormalities were independent of anxiety and depression status.”

This study also gives researchers a diagnostic tool to help predict a fibro patient’s response to a specific treatment and evaluate brain-processing recovery during follow-up.

“Fibromyalgia may be related to a global dysfunction of cerebral pain-processing,” Guedj added.

“This study demonstrates that these patients exhibit modifications of brain perfusion not found in healthy subjects and reinforces the idea that fibromyalgia is a ‘real disease/disorder.‘”

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What This Means For Fibromyalgia Patients

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This research does 3 important things for fibromyalgia patients:

  1. It gives legitimacy to their condition. No longer will family doctors, friends, family, employers, etc.. be able to tell fibro sufferers that their pain is not real, that it’s all in their heads.
  2. It gives researchers a tool to test treatment modalities.
  3. And now that they ‘know’ which areas of the brain are affected and how they are affected, they should be able to chart out a more direct route to a cure…or at least a treatment.

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Scientists Discover New Obesity Gene – Obesity Research Update #4

July 18th, 2008

Obesity researcher, Professor Philippe Froguel and his team have discovered a new obesity gene.

Apparently, this gene ( PCSK1 ) plays a part in the maturation of various hormones that control food intake.

This means that if you have a mutated version of this gene, you are predisposed to severe obesity. Severe obesity, not just regular, run of the mill obesity.

The Details

PCSK1 produces an enzyme called proconvertase 1.

Proconvertase 1 activates several hormones and circulating peptides that are involved in controlling appetite – insulin, glucagon, GLP1, and pro-opiomelanocortin (POMC).

The conclusion of this study is that even apparently minor abnormalities in a proconvertase 1 are enough to significantly increase the risk of severe obesity and to lead to excessive weight in the general population.

So what does this mean?

This means that if your PCSK1 gene is mutated, you are probably obese. Just like if your were born with a congenital leptin deficiency.

So, what percentage of the population is walking around with a deformed PCSK1 gene.

We don’t know, and neither do the scientists.

What causes this gene mutation?

We don’t know, and neither do the scientists.

Can this mutation be corrected?

We don’t know, and neither do the scientists.

Should obese individuals rely on science to provide them with a treatment for a potentially rare genetic mutation that most likely did not cause their obesity in the first place?

NO.

oops, sorry, my objectiveness slipped a little..

We don’t know, and neither do the scientists.

The study is published in the journal, Nature Genetics.

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Scientists discover the Couch Potato gene

July 17th, 2008

A group of researchers, from the University of North Carolina at Charlotte, have mapped out 23 specific chromosomal locations that account for 84% of the behavioral differences between low activity (see lazy) mice and high activity mice (see type A super achievers) – sorry, no human tests yet.

Link to Study # 1

Link to Study # 2

Initially, the researchers thought that the difference between the lazy and active mice was due to a genetic effect on the way energy is used by the muscle tissue.

This was proven false. Okay then, moving on.

This led the researchers to look at how genetic differences in brain chemistry might be causing this propensity towards laziness.

Success!

The Studies

The first thing the researchers did was to interbreed the active mice with the lazy mice. Then, they tested the offspring of this ‘unholy union’ for activity using three measurements – speed, endurance and distance.

Genetic tests were performed on the mice and strong correlations were found between the differences in the their genomes and their test results. In fact, the scientists identified 23 genes that were shown to affect activity levels.

While, the scientists have no idea what these genes are doing to cause these differences in activity level, they know that there is a link.

So what does this mean?

This may mean that while some people may be genetically predisposed to enjoy exercise, others may be genetically predisposed to glue their butts to the couch and watch re-runs of Murder She Wrote until they fall asleep in a Doritos induced slumber.

How depressing.

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