Introducing the brain: another way to process (Introduction)

by David Turell , Sunday, April 24, 2022, 01:26 (731 days ago) @ David Turell

A new process found:

https://www.sciencedaily.com/releases/2022/04/220422161527.htm

"...a new study led by Salk Professor Thomas Albright and Staff Scientist Sergei Gepshtein shows that there's also a second, very different way that the brain parses information: through the interactions of waves of neural activity.

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"This traditional model of the brain, however, couldn't explain how a single sensory cell can react so differently to the same thing under different conditions. A cell, for instance, might become activated in response to a quick flash of light when an animal is particularly alert, but will remain inactive in response to the same light if the animal's attention is focused on something else.

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"'The traditional view of brain function describes brain activity as an interaction of neurons. Since every neuron is confined to a specific location, this view is akin to the description of light as a particle," says Gepshtein, director of Salk's Collaboratory for Adaptive Sensory Technologies. "We've found that in some situations, brain activity is better described as interaction of waves, which is similar to the description of light as a wave. Both views are needed for understanding the brain."

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"The best way to explain how the neurons were behaving, they discovered, was through interaction of microscopic waves of activity rather than interaction of individual neurons. Rather than a flash of light activating specialized sensory cells, the researchers showed how it creates distributed patterns: waves of activity across many neighboring cells, with alternating peaks and troughs of activation -- like ocean waves.

"When these waves are being simultaneously generated in different places in the brain, they inevitably crash into one another. If two peaks of activity meet, they generate an even higher activity, while if a trough of low activity meets a peak, it might cancel it out. This process is called wave interference.

"To test their mathematical model of how neural waves occur in the brain, the team designed an accompanying visual experiment. Two people were asked to detect a thin faint line ("probe") located on a screen and flanked by other light patterns. How well the people performed this task, the researchers found, depended on where the probe was. The ability to detect the probe was elevated at some locations and depressed at other locations, forming a spatial wave predicted by the model.

"The discovery of how neural waves interact is much more far-reaching than explaining this optical illusion. The researchers hypothesize that the same kinds of waves are being generated -- and interacting with each other -- in every part of the brain's cortex, not just the part responsible for the analysis of visual information. That means waves generated by the brain itself, by subtle cues in the environment or internal moods, can change the waves generated by sensory inputs.

This may explain how the brain's response to something can shift from day to day, the researchers say.

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"The discovery of how neural waves interact is much more far-reaching than explaining this optical illusion. The researchers hypothesize that the same kinds of waves are being generated -- and interacting with each other -- in every part of the brain's cortex, not just the part responsible for the analysis of visual information. That means waves generated by the brain itself, by subtle cues in the environment or internal moods, can change the waves generated by sensory inputs.

"This may explain how the brain's response to something can shift from day to day, the researchers say."

Comment: brain waves do travel all over the place as EEG's show. Ther must be interference controls, and the designer's solution is partially shown now.