Human Brain’s "Radio Frequencies" Signal New Insights
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February 09, 2011

Human Brain’s "Radio Frequencies" Signal New Insights

Brain-scan Scientists at Washington University School of Medicine in St. Louis have tuned in to precise frequencies of brain activity for new insights into how the brain works. Neuroscientists have closely analyzed where and when the brain becomes active for many years, but now researchers are gathering evidence that the frequency of that activity can be a source of important insights. The discoveries are made possible by a grid of electrodes temporarily installed directly on the surface of a patient's brain to help pinpoint the source of medication-resistant seizures.

“Analysis of brain function normally focuses on where brain activity happens and when,” says Eric C. Leuthardt, MD. “What we’ve found is that the wavelength of the activity provides a third major branch of understanding brain physiology.”

The researchers used electrocorticography, a technique for monitoring the brain with a grid of electrodes temporarily implanted directly on the brain’s surface. Clinically, Leuthardt and other neurosurgeons use this approach to identify the source of persistent, medication-resistant seizures in patients and to map those regions for surgical removal. With the patient’s permission, scientists can also use the electrode grid to experimentally monitor a much larger spectrum of brain activity than they can via conventional brainwave monitoring.

Scientists normally measure brainwaves with a process called electroencephalography (EEG), which places electrodes on the scalp. Brainwaves are produced by many neurons firing at the same time; how often that firing occurs determines the activity’s frequency or wavelength, which is measured in hertz, or cycles per second. Neurologists have used EEG to monitor consciousness in patients with traumatic injuries, and in studies of epilepsy and sleep. In contrast to EEG, electrocorticography records brainwave data directly from the brain’s surface.

“We get better signals and can much more precisely determine where those signals come from, down to about one centimeter,” Leuthardt, assistant professor of neurosurgery, of neurobiology and of biomedical engineering, says. “Also, EEG can only monitor frequencies up to 40 hertz, but with electrocorticography we can monitor activity up to 500 hertz. That really gives us a unique opportunity to study the complete physiology of brain activity.”

Leuthardt and his colleagues have used the grids to watch consciousness fade under surgical anesthesia and return when the anesthesia wears off. They found each frequency gave different information on how different circuits changed with the loss of consciousness, according to Leuthardt.

“Certain networks of brain activity at very slow frequencies did not change at all regardless of how deep under anesthesia the patient was,” Leuthardt says. “Certain relationships between high and low frequencies of brain activity also did not change, and we speculate that may be related to some of the memory circuits.”

Their results also showed a series of changes that occurred in a specific order during loss of consciousness and then repeated in reverse order as consciousness returned. Activity in a frequency region known as the gamma band, which is thought to be a manifestation of neurons sending messages to other nearby neurons, dropped and returned as patients lost and regained consciousness.

Leuthardt and his colleagues have also shown that the wavelength of brain signals in a particular region can be used to determine what function that region is performing at that time. They analyzed brain activity by focusing on data from a single electrode positioned over a number of different regions involved in speech. Researchers could use higher-frequency bands of activity in this brain area to tell whether patients:

“We’ve historically lumped the frequencies of brain activity that we used in this study into one phenomenon, but our findings show that there is true diversity and non-uniformity to these frequencies,” he says. “We can obtain a much more powerful ability to decode brain activity and cognitive intention by using electrocorticography to analyze these frequencies.”

The Daily Galaxy via Washington University School of Medicine

Comments

Interesting. This could be an important step toward treating patients with traumatic brain injury, severe stroke, and other brain-damaging problems. Initially it will be only good for making more precise diagnoses, but that could later be used to pinpoint where replacement parts (whether artificial or regrown brain cells) can be put.

It could also be an early step in creating artificial telepathy. Despite its clear potential for abuse, it could be very helpful for people with communication problems -- aphasia, severe to profound autism, vocal cord damage, and so forth.

(And what's up with the fragmented sentence "Researchers could use higher-frequency bands of activity in this brain area to tell whether patients:"?)

OK, no pun intended... but isn't this a no-brainer?

I don't mean to rag on the discovery - I mean yes, it's good they're doing this, and yes it's good they're reporting it... but seriously - is anyone surprised to find that the frequency of brain signals is important? How could it NOT be? Is there a single phenomenon anywhere in nature for which the intensity of a signal is important in determining function but the frequency of the signal is irrelevant? ECoG has been around since the 50's! (Thank-you, Wikipedia) And we're just getting to this? What took doctors over 50 years to figure out they should be looking at intensity AND frequency?

It's the final proof - way too many doctors are doing stupid stuff (e.g. endless boob jobs and tummy tucks) and not enough doing important stuff (like figuring out how our freaking brains work, so we can fix them when they screw up!).

Why don't we grow a brain in a controlled environment to see how it developes in all the areas throughout it's developement, so we can figure out a way to teach our kids the right development the mind needs in order to become its full potential. Like certains times in peoples lives should be made for opening up the mind and in adulthood they are fully equiped to handle any situation.

Important finding indeed!

Our brain regulates its activities by means of electric waves emitted at different frequencies that can be recorded in EEG. These brain waves and the activities associated with them are : -

 ALPHA: frequencies ranging from 8 to 13 hertz, during the conscious state of relaxed awareness and attentional activities of learning and performing tasks;
 BETA: emitted within the frequencies of 18 t0 25 hertz, during consciously alert state or when one is tense, anxious or agitated;
 DELTA: frequencies within 0.5 to 3.4 hertz occurring during unconsciousness and non-rapid eye movement (NREM) deep sleep (during first half of night)
 THETA: emitted within frequencies of 4 to 7 hertz, responsible for memory consolidation, cognition, focused attention, learning, mental imagery, meditation and deep relaxation. It also prevails during rapid eye movement (REM) sleep (during second half of night) to consolidate memory.

Read more http://rewiringthebrain.net/

Our brain regulates its activities by means of electric waves emitted at different frequencies that can be recorded in EEG. These brain waves and the activities associated with them are : -

 ALPHA: frequencies ranging from 8 to 13 hertz, during the conscious state of relaxed awareness and attentional activities of learning and performing tasks;
 BETA: emitted within the frequencies of 18 t0 25 hertz, during consciously alert state or when one is tense, anxious or agitated;
 DELTA: frequencies within 0.5 to 3.4 hertz occurring during unconsciousness and non-rapid eye movement (NREM) deep sleep (during first half of night)
 THETA: emitted within frequencies of 4 to 7 hertz, responsible for memory consolidation, cognition, focused attention, learning, mental imagery, meditation and deep relaxation. It also prevails during rapid eye movement (REM) sleep (during second half of night) to consolidate memory.

Read more http://rewiringthebrain.net/

Our brain regulates its activities by means of electric waves emitted at different frequencies that can be recorded in EEG. These brain waves and the activities associated with them are : -

 ALPHA: frequencies ranging from 8 to 13 hertz, during the conscious state of relaxed awareness and attentional activities of learning and performing tasks;
 BETA: emitted within the frequencies of 18 t0 25 hertz, during consciously alert state or when one is tense, anxious or agitated;
 DELTA: frequencies within 0.5 to 3.4 hertz occurring during unconsciousness and non-rapid eye movement (NREM) deep sleep (during first half of night)
 THETA: emitted within frequencies of 4 to 7 hertz, responsible for memory consolidation, cognition, focused attention, learning, mental imagery, meditation and deep relaxation. It also prevails during rapid eye movement (REM) sleep (during second half of night) to consolidate memory.

Read more http://rewiringthebrain.net/

And why not also make the concious scientifical brain-connection to the near and far cosmos where everything is electromagnetic too.

We are electromagnetic beings influenzed by everything else electromagnetic around us, on the Earth; from the Sun; from the solar system; from our galaxy and far beyond.

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Rajnilu, thanks for bringing our attention to the near and far electromagnetic universe that surrounds us and is us.

The universe is electromagnetic in time/space realms. All electromagnetic frequencies (EMFs) influence and are influenced through entrainment. Electromagnetism is also infinite, or near-infinite, as some prefer to say. So, everything affects everything.

The body's EMFs are changeable. In an excited state, our heart, by far the most powerful EMF generator in our body, beats faster, changing the frequency. The powerful frequencies of our heart affect the frequencies of our brain and our cells, as well as the rest of the universe.

The emotions behind the beat of the heart are frequencies, which can be measured by sensitive equipment and felt by others as good or bad vibes. They can also be controlled by a conscious mind. When our thoughts change about a situation, our emotions change correspondingly. Biofeedback devices can show us how our thoughts and emotions affect our frequencies. They can also teach us how to maintain certain desirable frequencies. If they're near-infinite, why not choose the good ones?

Many profound things are happening now, affecting everything. Currently, our solar system is hurtling toward the center of the galactic plain, which the Mayans calculated we would reach on December 21, 2012. On the other side we will pass through the Dark Rift. The Dark Rift is a ribbon of intense magnetism created by the spinning of a massive black hole at the center of our galaxy.

What happens to our electromagnetic frequencies when we pass through the intense magnetic field of the Dark Rift? In electromagnetism, electricity is the flow and magnetism is the charge. All of our information, everything we see and know, is electromagnetic, is it not? Strong magnetism slows down movement and perhaps stops it in the case of Zero Point, which some speculate is related to Dec. 21, 2012. If it stops movement, what happens to our thoughts? our heartbeat? our vision? What happens to the information that is stored in our electronics and the systems that are dependant on that information?

These and other related questions are some of the most important ones we need to ask ourselves and talk together about now.

Wendee

Sorry, it was Ivar Neilson I wanted to acknowledge.

Can you tell me the amplitude of the Alpha, Beta, Delta and Theta waves emitted from the brain?

Someone has already made artificial telepathy possible and it is already being used and abusive in investigative works by unknown people. I do have personal experience but not evidence of the abusers. Please keep this on file as this news will surely be unveiled in the near future as word spreads and the culprits found.


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