Typical circuits textbooks tell us that there are four basic feedback topologies. The impression is given (if not stated) that a given feedback circuit will conform to one of these four topologies.

A newly identified part of a brain circuit mixes sensory information, memories, and emotions to tell whether things are familiar or new, and important or just "background noise." Led by researchers ...

Cornell led team mapped how psilocybin changes connections across the brain in mice The drug weakened feedback loops in the cortex that may underpin rumination It strengthened links between sensory ...