New Brain Signals Reveal How Fear Memories Are Extinguished
In a breakthrough study that translates decades of animal research into human neuroscience, scientists have identified the brain signals that mark the extinction of fear memories in people. The researchers used invasive brain recordings from patients with epilepsy who already had electrodes implanted for medical care. They show that theta brainwave activity in the amygdala rises when previously fear-linked cues are relearned as safe. The findings, published in a prestigious journal, also reveal that extinction memories are highly context-specific, which helps explain why fear can resurface when a person leaves the therapy room or therapeutic setting. The study’s authors say these insights could open new avenues for treating fear-related conditions such as post-traumatic stress disorder and general anxiety disorders.