New evidence suggests the brain can update poorly formed memories with incorrect information, leading to the creation of false memories.
Neuroimaging reveals areas of the brain associated with visual and auditory processing are more active when anxiety slowly increases during horror movies. After a shocking scene, brain areas associated with emotional processing, threat evaluation, and decision making increase in activity.
Fear extinction memories and feelings of reward are both stored in neurons that express the Ppp1r1b gene in the posterior of the basolateral amygdala.
Mice infected with the Toxoplasma gondii parasite showed no selective reduction in fear of feline predators. Findings reveal chronic T. gondii infection reduces anxiety and risk-aversion while increasing curiosity and exploratory behaviors.