Your nervous system uses billions of tiny, connected nerve cells called neurons to send the messages, which are electrical and chemical signals that tell your body what to do. Your nervous system ...

Neuroscience examines the structure and function of the human brain and nervous system. Neuroscientists ... Humans have an estimated hundred billion neurons, or brain cells, each with about ...

A new study sheds new light on these big questions, illuminating a general principle of neural processing in a mysterious region of the midbrain that is the very origin of our central serotonin (5-HT) ...