Hippocampal CA2 Circuit Controls Social Memory And Triggers Aggression

CA2 hippocampal region
A brain region that helps tell an animal when to attack an intruder and when to accept it into its home has been identified by researchers at Columbia University. The brain area, called CA2, is part of the hippocampus, a larger brain structure known to be critical for our memory of people, places, things and …

Aggressive Conversations Can Expand Your Interpersonal Space

interpersonal space
Many people have experienced the urge to cross the road or move seats on a bus after a conversation taking place nearby suddenly becomes aggressive. Now, a scientific study has shown how the size of your interpersonal space changes depending on the tone and content of other people’s conversations. The research was conducted by instigators …

Physical Aggression Manifests Earlier In Frontotemporal Dementia

neurodegeneration
One-third of patients diagnosed with Alzheimer's disease or frontotemporal dementia were physically aggressive towards healthcare staff, other patients, relatives, animals and complete strangers, a study from Lund University shows. "The prevalences are not surprising, but we noted a difference between the two groups in terms of when in the course of the disease aggressive behaviour …

Two Serotonergic Neuron Subtypes Affect Aggressive Behavior

serotonergic neuron subtypes
A small grouping of homogeneous brain cells make the neurotransmitter serotonin regulate many functions, from breathing to mood to appetite. But how do they do it? They're not so homogeneous after all. Over the past few years, researchers, including Harvard Medical School geneticist Susan Dymecki, have begun uncovering distinct subtypes of serotonin neurons that seem …

Bullying Motivation Regulated By Brain Reward Circuits

bullying reward circuits
Individual differences in motivation for engaging in or avoiding aggressive social interaction are mediated by the basal forebrain, lateral habenula circuit in the brain, according to a study from the Icahn School of Medicine at Mount Sinai. The study focuses on identifying the mechanisms by which specific brain reward regions interact to modulate the motivational …

Does Toxoplasma Gondii Play A Role In Rage Disorder?

toxoplasmosis
Individuals with a psychiatric disorder involving recurrent bouts of extreme, impulsive anger— road rage, for example— are more than twice as likely to have been exposed to a common parasite than healthy individuals with no psychiatric diagnosis. In a study involving 358 adult subjects, a team led by researchers from the University of Chicago found …

The Brain Region That Motivates Violent Attacks

aggression
The ominous behaviors that often precede violent acts, such as stalking, bullying, and possibly sexual aggression, are tied to a distinct part of the hypothalamus, the brain region that also controls body temperature, hunger, and sleep in mammals, new research shows. The structure is anatomically known as the ventrolateral part of the ventromedial hypothalamus, or …