MIT researchers discovered that three commonly used anesthesia drugs — propofol, ketamine, and dexmedetomidine — all produce the same effect in the brain despite having different molecular mechanisms. Each drug disrupts the brain's balance between stability and excitability, causing neural activity to destabilize until consciousness is lost. This 'universal signature' was identified using a computational model analyzing neural responses to auditory stimuli. The finding opens the door to a universal anesthesia monitoring system using EEG that could measure brain destabilization regardless of which drug is used, helping doctors administer just enough anesthesia to reduce risks like worsening dementia or neuropsychiatric conditions. A clinical trial of a prototype monitoring device is being planned.
Sort: