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May 12, 2021MIT In a uniquely deep and detailed look at how the commonly used anesthetic propofol causes unconsciousness, a collaboration of labs at the Picower Institute for Learning and Memory at MIT shows that as the drug takes hold in the brain, a wide swath of regions become coordinated by very slow rhythms that maintain a commensurately languid pace of neural activity. Electrically stimulating a deeper region, the thalamus, restores synchrony of the brain’s normal higher frequency rhythms and activity levels, waking the brain back up and restoring arousal. “There’s a folk psycholo...

Caption: Researchers measured how strongly brain waves were synchronized before, during, and after anesthesia with propofol. Data from the research shows strong increases in synchrony only in very slow frequencies (deep red color along bottom) between the thalamus and four cortical regions while animals were unconscious. Credits: Image courtesy of the Miller/Brown labs, Picower Institute Previous image Next image In a uniquely deep and detailed look at how the commonly used anesthetic propofol causes unconsciousness, a collab...

Research provides deep and detailed look at how common anesthetic causes unconsciousness In a uniquely deep and detailed look at how the commonly used anesthetic propofol causes unconsciousness, a collaboration of labs at The Picower Institute for Learning and Memory at MIT shows that as the drug takes hold in the brain, a wide swath of regions become coordinated by very slow rhythms that maintain a commensurately languid pace of neural activity. Electrically stimulating a deeper region, the thalamus, restores synchrony of the brain's normal higher frequency rhythms and activity levels, wakin...

Wed, 28 Apr 2021 09:20 UTC Simultaneous measurement of neural rhythms and spikes across five brain areas in animals reveals how propofol induces unconsciousness. In a uniquely deep and detailed look at how the commonly used anesthetic propofol causes unconsciousness, a collaboration of labs at The Picower Institute for Learning and Memory at MIT shows that as the drug takes hold in the brain, a wide swath of regions become coordinated by very slow rhythms that maintain a commensurately languid pace of neural activity. Electrically stimulating a deeper region, the thalamus, restores syn...

Caption: Our ability to highlight surprises stems from a specific interplay of brain waves that suppress processing of predicted stimuli, such as the things we always see around the office, to pave the way for heightened processing of what's new, like a gift left on the desk one morning. Previous image Next image If you open your office door one morning and there is a new package waiting on your desk, that’s what you will notice most in the otherwise unchanged room. A recent study by MIT and Boston University neuroscientists finds that the dynamic interplay...