Scientists have studied the main source of serotonin in the brain -- the dorsal raphe nucleus (DRN). By studying how activating the brain's 'serotonin center' affects awake animals for the first time, ...

Why do some brains crave more stimulation than others? Learn about dopamine, genetics, and brain function, and how dopamine ...

SNr neurons in the midbrain send precise signals to control movement. Their activity determines which movements actions are initiated or inhibited. Neurons deep in the brain not only help to initiate ...

Using light stimulation and MRI, scientists compared the effects of stimulating the brain’s serotonin center in awake and anesthetized mice, showing a clear difference in activation levels between the ...