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posted by janrinok on Friday October 25 2019, @09:38PM   Printer-friendly
from the KISS dept.

Arthur T Knackerbracket has found the following story:

Have you ever sat down to complete your morning crossword or Sudoku and wondered about what's happening in your brain? Somewhere in the activity of the billions of neurons in your brain lies the code that lets you remember a key word, or apply the logic required to complete the puzzle.

Given the brain's intricacy, you might assume that these patterns are incredibly complex and unique to each task. But recent research suggests things are actually more straightforward than that.

It turns out that many structures in your brain work together in precise ways to coordinate their activity, shaping their actions to the requirements of whatever it is that you're trying to achieve.

We call these coordinated patterns the "low-dimensional manifold," which you can think of as analogous to the major roadways that you use to commute to and from work. The majority of the traffic flows along these major highways, which represent an efficient and effective way to get from A to B.

We have found evidence that most brain activity follows these types of patterns. In very simple terms, this saves your brain from needing to work everything out from scratch when performing a task. If someone throws you a ball, for instance, the low-dimensional manifold allows your brain to swiftly coordinate the muscle movements needed to catch the ball, rather than your brain needing to learn how to catch a ball afresh each time.

In a study published today in the journal Neuron, my colleagues and I investigated these patterns further. Specifically, we wanted to find out whether they play a role in shaping brain activity during really challenging cognitive tasks that require lots of concentration.

[... They found that] the circuitry of the thalamus is such that it can act as a filter for ongoing activity in the cerebral cortex, the brain's main information processing center, and therefore could exert the kind of influence we were looking for.

Patterns of activity in the thalamus are hard to decipher in traditional neuroimaging experiments. But fortunately, the high-resolution MRI scanner used in our study collected by my colleagues Luca Cocchi and Luke Hearne allowed us to observe them in detail.

Sure enough, we saw a clear link between activity in the thalamus and the flow of activity in the low-dimensional manifold. This suggests that when performing particular tasks, the thalamus helps to shape and constrain the activity in the cortex, a bit like a police officer directing busy traffic.


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  • (Score: 2) by krishnoid on Friday October 25 2019, @10:53PM

    by krishnoid (1156) on Friday October 25 2019, @10:53PM (#911897)

    If someone throws you a ball, for instance, the low-dimensional manifold allows your brain to swiftly coordinate the muscle movements needed to catch the ball, rather than your brain needing to learn how to catch a ball afresh each time.

    A ball, sure. But other things [youtube.com] ... maybe it doesn't work all the time.

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