A phenolic amine neurotransmitter found especially in the brain, blood serum, and gastric mucosa of mammals that is a powerful vasoconstrictor. Serotonin levels in the brain are associated with feelings of pleasure, or anxiety and depression.

Articles on that refer to Serotonin

Clottocytes: Artificial Mechanical Platelets By Robert A. Freitas Jr.
Another Formula for Intelligence: The Neural Net Paradigm By Ray Kurzweil
Dialogue between Ray Kurzweil, Eric Drexler, and Robert Bradbury By K. Eric Drexler, Ray Kurzweil, and Robert Bradbury

News Articles that refer to Serotonin

The Skinny on Fat: You're Not Always What You Eat
Brain chemical helps us tolerate foul play
Proteins Are Transformed, Then Put to More Uses
Gene linked to poorer memory
Too High for Love: Lost Your Drive?
The Altered Human Is Already Here
First 'placebo gene' discovered
'Neurological Work-arounds' Offer Hope For Conditions Ranging From Addiction To Schizophrenia
Scientists Make Paralyzed Rats Walk Again After Spinal-cord Injury
Giving America a Vision Implant -- Crayfish, Neurochemicals and the Future of Your Civilization

Related Links

Serotonin Club
Serotonin and Judgement