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, ...

Serotonin from the mother is taken up by the fetal placenta, which then produces a myriad of hormones, growth factors, and regulators that are delivered to the fetus. Credit: Yale University For the ...

Serotonin is often referred to as the "happiness molecule." It plays a critical role in affecting mood levels and is also a neurotransmitter that sends signals within the brain and the body.

Comparing PET scans of more than 90 adults with and without mild cognitive impairment (MCI), researchers say relatively lower levels of the so-called 'happiness' chemical, serotonin, in parts of the ...

Researchers at Baylor College of Medicine, the University of Cambridge in the U.K. and collaborating institutions have shown that serotonin 2C receptor in the brain regulates memory in people and ...