Serotonin is a brain neurochemical that is synthesized directly within the brain from its precursor, a monoamine amino acid called tryptophan. It modulates neural function, playing a vital role in a ...

People who repeatedly observe aggression have a higher likelihood of engaging in violent behavior later in life. In a new JNeurosci paper, Jacob Nordman and colleagues, from Southern University of ...

Mistreating a dog may come back to bite you. Scientists have long known that childhood abuse, neglect, and trauma can have lifelong consequences in humans. Now, a study by Harvard scientists links ...

If you've ever had to grit your teeth during rush hour traffic or hold your tongue in a work meeting, you know just how pervasive feelings of aggression can be. We've all been there. Anger is one of ...

What Is Passive-Aggressive Behavior? Passive-aggressive behavior is when you express negative feelings indirectly instead of openly talking about them. During World War II, when soldiers wouldn't ...

While narcissism is a personality disorder, psychologists remain curious about how it can manifest physically. According to a thorough analysis of 437 studies on narcissism around the world, there ...

This post is a review of Killer Instinct: The Popular Science Of Human Nature In Twentieth Century America. By Nadine Weidman. Harvard University Press. 360 pp. $45. With the publication of two ...

Schizophrenia is occasionally associated with a higher risk of aggressive behavior, but the physical brain differences linked ...