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How our brains encode thoughts, such as perceptions and memories, at the cellular level is one of the biggest puzzles in
neuroscience today. One theory suggests that ensembles of neurons represent each unique piece of information. No one knows, however, just what these ensembles look like, or how they form.
A new study, published in a recent issue of
Neuron, sheds light on how neural ensembles form thoughts and support the flexibility to change one's mind.
Earl Miller, the Picower Professor of Neuroscience at
MIT, led the study which has identified groups of neurons that encode specific behavioral rules by oscillating in synchrony with each other. The nature of conscious thought, the results suggest, may be rhythmic.
"As we talk, thoughts float in and out of our heads. Those are all ensembles forming and then reconfiguring to something else. It's been a mystery how the brain does this," says Miller, who is also a member of MIT's Picower Institute for Learning and Memory. "That's the fundamental problem that we're talking about - the very nature of thought itself."
Using monkeys trained to respond to objects based on either their color or orientation, the team identified two neural ensembles. Such a task requires cognitive flexibility, which is the ability to switch between two distinct sets of rules for behavior.
Comment: The following articles are additional examples of how Meditation Techniques Have Different Effects on the body, brain and emotions:
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