D
(2017·四川眉山一诊)
Reading minds isn't quite simple, but it may not be impossible, either.What if a brain scan could reveal your memories?
A team of British scientists recently did just that—they used brain scans to look at spatial(空间的) memory in four people.Spatial memory is the kind of memory you use to remember where you are.You use spatial memory to remember how to get from your house to school.People build spatial memory as they explore a new city or a new building and take in information about their surroundings.
The scientists asked each participant to sit down at a computer and wander through rooms.These virtual rooms contained images of objects, like clocks and doors, so that the people could know where they were.Each person was encouraged to explore the virtual space.
As the people became familiar with these rooms, their brain cells were taking notes of where things were, and how to get from one point to another.After perusing(详细考察) these rooms, the participants were instructed to go to a specific location within the rooms.At this point, the scientists took pictures of the subjects' brains using an instrument called FMRI (磁共振成像).
As participants stared at the floor, the scientists took FMRI scans to measure brain activity.They repeated this process multiple times.After a few repetitions, the scientists could identify patterns in the subjects' brains.By looking at patterns on the brain scans, the scientists were able to read the spatial memory of the test subjects.
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2017-04-24
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