How brain oscillations respond to teleportation

February 25, 2016, UC Davis
Credit: Wikimedia Commons

Technology may not have caught up to the teleportation devices of science fiction, but now we have some idea of how the brain handles "beaming up" from one location to another, thanks to research by neuroscientists at the University of California, Davis, involving some specially wired volunteers.

The work is published online Feb. 25, 2016 in the journal Neuron.

Arne Ekstrom, associate professor at the UC Davis Center for Neuroscience, wants to know how we memorize places and routes, and learn to find our way around. It's long been known that as a rat navigates a maze, its gives off a rhythmic oscillation, Ekstrom said. This also happens when humans travel around a virtual landscape on a computer screen. Most models of brain function assume that the oscillations, emanating from the hippocampus deep inside the brain, are at least partly driven by external inputs.

"There is this rhythmic firing in the brain during navigation and while remembering things, but we don't know if it is triggered by sensory input or by the learning process," Ekstrom said.

Ekstrom, postdoc Lindsay Vass and graduate student Milagros Copara were able to solve this problem by working with a group of patients being treated at UC Davis' Department of Neurological Surgery. These patients have a severe form of epilepsy, and surgeon and study coauthor Kia Shahlaie implanted electrodes on their brains, inside the skull, to find out where seizure activity begins and identify treatment options.

Video shows the view of a subject navigating an on-screen environment including teleportation while their brain waves are recorded from intracranial electrodes. These show that an oscillation that 'paces' movement through this maze is internally generated. Credit: Lindsay Vass, UC Davis

In between seizures, the electrodes recorded normal brain activity, and three patients volunteered to take part in the experiment. They were asked to navigate through a streetscape on a computer screen. At some points, they entered a teleporter and jumped to a different, known location in the map. During teleportation, the screen went black for a random period of time.

Teleportation did not interrupt the oscillations at all, but the rhythm did change with the distance travelled during teleportation, Ekstrom said.

The results show that these oscillations are driven entirely by memory and learning processes in the brain, and do not depend on external senses. They also show that the oscillation carries information about speed and distance travelled, even when that travel is virtual teleportation.

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SoylentGrin
not rated yet Feb 25, 2016
They also show that the oscillation carries information about speed and distance travelled, even when that travel is virtual teleportation.


I wonder if the brain dealt with virtual teleportation the same way it deals with doors opening onto different rooms (elevators) or a traveler falling asleep during a journey, waking up in a new location.
xponen
not rated yet Feb 25, 2016
I read that; the hippocampus store actual world locations in a grid of neurons, much like a city grid.

Also, the alpha (slow oscillation) represent the extra brain activation at the peak (of the wave) followed by valley of oscillation which represent the lowest rest, as form of optimization/efficiency mechanism.

And, the theta (high frequency) represent memory process.

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In my opinion, could the rhythm be from the result of that layout in neuron grids, in superposition with the 2 wave that's associated with consciousness optimization & memory process?

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