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Old 01-14-2010, 06:41 PM   #1
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Default Scientists Figure Out the Cause of Brain Farts

Scientists Figure Out the Cause of Brain Farts

by Joseph Mercola


A "brain fart" is a term for an inexplicably stupid error in a straightforward task made by someone with abundant skill and experience. Everyone is prone to them. Neuroscientists call these episodes "maladaptive brain activity changes."

The latest research seems to indicate that brain farts are a unique type of cognitive mistake. They have a predictable neural pattern that emerges up to 30 seconds before they happen.

Basically, your brain will take any opportunity to shut down some of its processing systems. Here’s the process step by step:

t–10 minutes
You’re daydreaming, and your medial temporal lobe subsystem, precuneus, medial prefrontal subsystem, and posterior cingulate cortex, which together make up the default mode network (DMN) are all active.

t–5 minutes
You confront a demanding task, such as driving home. Your anterior cingulate and right prefrontal regions, brain areas involved in attention, begin to activate, as do the cerebellum and the parietal, visual, and temporal cortices, which control the motor coordination you need to pilot through traffic. At the same time, the DMN deactivates.

t–30 seconds

Your route is extremely familiar. Your frontal lobes, bored by this habitual task, begin to power down. The retrosplenial cortex in the posterior section of the DMN begins to stir again. When the balance of activity between the DMN and the attention network reaches a certain threshold, you enter an error-prone state. You miss your exit off the highway.

t+5 seconds
Your frontal lobes fire up again at high levels in an attempt to compensate for the error. They return to a state of optimal performance, ready to work on a corrective action.

t+15 seconds
The stress of having made a blunder activates the limbic-hypothalamic-pituitary-adrenal axis, your brain’s "panic button." You experience a surge of the stress hormone cortisol.
Source: Discover Magazine December 22, 2009

Dr. Mercola's Comments:

We’ve all experienced brain farts – those major "oops" moments when you make a really obvious mistake. This interesting article from Discover Magazine expands on the latest research surrounding brain farts, or as neuroscientists call them "maladaptive brain activity changes" – and essentially explains that having brain farts is just part of being human.
Basically, it’s an interesting observation on why we tend to mess up!

To put it simply, researchers explain that the default mode network (DMN) of your brain is responsible for your inward-focused thinking, such as daydreaming. But this is far from a passive activity, and actually uses up a lot of energy. The DMN competes, in a sense, with other areas of your brain for resources, and in order for you to carry out a task that requires focused attention, your brain must inhibit the DMN.

But remember, the DMN is the default setting of your brain, meaning that you will probably revert back to it while performing many tasks of your daily grind. Your brain perceives many of these tasks as patterns; they’re activities you’ve done many times before so your brain may take a quick time out.

It’s during these "time outs," when your brain is shutting down some of its processing systems it believes you don’t need in that moment, that brain farts are likely to occur. In just the blink of an eye, you miss your exit driving home from work, send an important email to the wrong person or forget what you went into the next room to grab.

Fortunately, DMN blips are typically short-lived, and once you realize you’ve made an error your brain will likely kick into overdrive to try and correct the mistake.

Can You "Train Your Brain" to Avoid "Maladaptive Brain Activity Changes"?
It may be next to impossible to completely eliminate DMN blips from your life, but you can certainly ramp up your brain function to enhance your memory, skills and more.

Your brain is actually a very moldable organ that can even rewire itself if given the proper tools.

In fact, humans continue to make new neurons throughout life in response to mental activity.

Brain volume was commonly believed to stop expanding after age 20. But in MRI brain scans researchers have found that white matter in your brain continues to increase until people are in their mid- to late-40s.

One of the simplest methods to boost your brain function is to keep on learning. The size and structure of neurons and the connections between them actually change as you learn. This can take on many forms above and beyond book learning to include activities like traveling, learning to play a musical instrument or speak a foreign language, or participating in social and community activities.

Another important method? Brain aerobics. As with learning, challenging your brain with mind-training exercises can keep your brain fit as you age. This can be something as simple as thinking of famous people whose first names begin with the letter A, doing crossword puzzles or playing board games that get you thinking.

A Healthy Lifestyle is Your Key to a Healthy Brain
Your brain is directly impacted by the type of lifestyle you choose to lead, and leading a healthy one will likely radically reduce the occurrence of brain farts, not to mention keep your brain functioning at its best.
My top lifestyle recommendations for a healthy brain include:
  1. Take omega-3 fats. The omega-3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) keep the dopamine levels in your brain high, increase neuronal growth in the frontal cortex of your brain, and increase cerebral circulation. Krill oil is an excellent source of omega-3, and in my opinion is superior to fish oil because of its higher brain absorption and inherent protective antioxidants.
  2. Exercise. Exercise may encourage your brain to work at optimum capacity by causing nerve cells to multiply, strengthening their interconnections and protecting them from damage.
  3. Sleep well. It’s during sleep that your mental energy is restored, and a lack of sleep may cause your brain to stop producing new cells.
  4. Eat healthy. Like the rest of your body, your brain depends on healthy foods to function. While protein is the main source of fuel for your brain, vitamins and minerals from fresh veggies are also important, as is limiting sugar.

  5. Get out into the sun. This will help you maintain optimal vitamin D levels. Scientists are now beginning to realize vitamin D is involved in maintaining the health of your brain, as they’ve recently discovered vitamin D receptors in your brain, spinal cord, and central nervous system. There’s even evidence indicating vitamin D improves your brain’s detoxification process. For children and pregnant women, getting enough vitamin D is especially crucial, as it may play a major role in protecting infants' brains from autism.
  6. Turn off your TV. Allowing children under the age of 3 to watch television can impair their linguistic and social development, and it can affect brain chemistry as well.
  7. Protect your brain from cell phones. Recent studies have found that cell phone users are 240 percent more prone to brain tumors, and a study in 2004 found that your risk of acoustic neuroma (a tumor on your auditory nerve) was nearly four times greater on the side of your head where your phone was most frequently held.
  8. Avoid foods that contain artificial sweeteners and additives. Substances such as aspartame (Nutrasweet), artificial color and MSG, which are common in processed foods, can damage your brain. For instance, consuming a lot of aspartame may inhibit the ability of enzymes in your brain to function normally, and high doses of the sweetener may lead to neurodegeneration.
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