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A 3D rendering of the serotonin system in the left hemisphere of the mouse brain reveals two groups of serotonin neurons in the dorsal raphe that project to either cortical regions (blue) or subcortical regions (green) while rarely crossing into the other’s domain

A new map of the brain’s serotonin system

Earlier before six years, using neuroanatomical methods that they invented, scientists found that the brain's serotonin system in brain promotes pleasure. Now, after six years,...