New Study Reveals Universal Brain Activity Patterns Under Anesthesia Across Diverse Species
A new study published in Nature Neuroscience, led by neuroscientist Andrea Luppi of the University of Oxford, has uncovered a universal mechanism by which general anesthesia affects the brain across a wide range of species. The research compared the neural activity of six vastly different animals—humans, macaques, marmosets, mice, zebrafish, and nematodes (roundworms)—when they were awake versus under general anesthesia. Despite 700 million years of evolution separating these species and the use of different anesthetic drugs, consistent patterns emerged. The study found that under anesthesia, neural activity between brain regions became less coordinated, and brain activity appeared more chaotic over time. This suggests that anesthesia induces a breakdown in the relationship between past and future neural activity, causing predictable patterns of brain activity to fall apart. This common pathway of anesthesia involves the spatiotemporal isolation of local neural activity, where individual circuits lose thei...
