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The human brain retreats to recover memories


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When we recall a past event, the human brain rebuilds experience in reverse order, according to a new study conducted at the University of Birmingham.

In order to understand more specific ways of recovering brain information, it will help us to assess the reliability of eye-witness accounts, such as the scene of crime; People are often able to recall the general "gist" of an event, but it reliably recalls the precise vision.

Research published Nature CommunicationsIt was done by researchers from the Brain Human Health Center and reconstructed the memory recovery process using development decoder techniques. Thanks to these techniques, it consists of the peculiar memory of the restructuring of the brain.

When you get information about an object object, the brain focuses first in this sense, retrieving "gist" and remembering more specific details.

This is a sharp contrast when it comes to processing the brain's images. When we first saw a complex object, we are the visual details and patterns that we first perceive. The summary and meaningful information that tells us the nature of the object we see, such as a dog, guitar or cup, for example, comes later.

"We know that our memories were not the exact replication of things we originally had," says Juan Linde Domingo, the principal author of the research. "Memory is a process of reconstruction that comes from personal knowledge and the perspective of the world, sometimes recalling events that have never really happened, but, specifically, how memories develop in the brain, step by step, is not understood right now."

During the study, participants viewed images of specific objects, then learned to link each image to a single word of recovery, such as & # 39; spin & # 39; or & # 39; pull & # 39; word. The participants presented the word they remembered and wanted to reconstruct the associated image with as much detail as possible.

Brain activity was recorded throughout the entire 128 scalp electrodes, and researchers can determine brain modifications in milliseconds. In the end, the researchers prepared a computer algorithm to decipher the image that this participant was recovering in different types of tasks.

"Participants received early and abstract information, for example, to think of an animal or a living object, after hearing the reminders," said Maria Wimber, author of the study. .

"Later, they retrieved specific details, for example, looking for a color object or a black and white schema".

"Although our memories have conceptual information, they also have the effect of changing our memories over and over again," added Linde Domingo.

"It seems to be more abstract and invigorating with each recapture. Even though our memories seem as vivid as the" inner eyes ", they are not simple, but rebuilt and rounded representations of the past."

Monitoring studies will have to prove that the rebuilt cascade reverse cleaner & # 39; It's in the brain. If so, the reconstruction sequence must be stable in different conditions, although one person carefully focuses carefully and carefully on the specific details while studying carefully.

Nowadays, the team is currently examining in detail how to replicate the brain and where more complex memories are. When the memory recovery paths are established in healthy brain, researchers can analyze how they change in healthy old age, or how to translate this path into conditions such as post-traumatic stress disorder that can lead to excessive generalization of memories.

Why do two people see the same thing but they have different memories

More information:
Linde-Domingo & Wimber et al (2019) & # 39; The perception of the object and the rebuilding of the object rebuilding memory between neural information & # 39; Nature Communications

University of Birmingham

The human brain retreats to recover memories (2019, January 14)
They were retrieved on January 14, 2019

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