CAMBRIDGE, MA -- When patients undergo general anesthesia, their brain activity often slows down as they sink into unconsciousness. Higher doses of anesthetic drugs can induce an even deeper state of ...

Massachusetts General Hospital (MGH) investigators have identified specific EEG (electroencephalogram) signatures that indicate when patients lose and regain consciousness under the general anesthetic ...

Researchers have used functional magnetic resonance imaging (fMRI) to study the precise spatial distribution of synchronously working brain regions in anesthetized humans, long-tailed macaques, common ...

“Our brain can be thought of as a full soccer stadium when we are awake,” explains Nikoloz Sirmpilatze, a scientist in the Functional Imaging Unit and lead author of the study. “Our active neurons are ...

Jena, Germany, 1924: Working in near-isolation and with painstaking tediousness, the psychiatrist Hans Berger observes rhythmic electrical activity from the scalp of human subjects. He is convinced ...