Study finds amygdala activity predicts which memories stick in humans, broadening understanding of brain storage beyond the hippocampus for memory retention.

The amygdala may play a major role in determining which moments are remembered, researchers reported Friday.

The brain structure, long linked to fear and aggression, showed a strong association with memory retention in a new investigation. Scientists examined how activity in the amygdala correlated with participants' ability to recall events later on.

Lead author of the study said the findings broaden the understanding of memory processes that have traditionally focused on the hippocampus. "Our results indicate that the amygdala contributes to selecting which experiences are stored," the author said.

Participants viewed a series of images while brain scans recorded neural responses. Later, they were tested on how many images they could retrieve. The analysis revealed that heightened amygdala activation during the viewing phase predicted better recall, even when the images were not overtly threatening.

These observations challenge the view that the amygdala functions solely in emotional arousal. Instead, the structure appears to act as a filter, flagging salient information for long‑term storage. The researchers caution that the relationship is complex and may vary with the type of stimulus and individual differences.

Experts not involved in the work noted that the study adds to a growing body of evidence linking emotion‑related brain regions to memory formation. "It underscores that memory is not a single‑track process," one neuroscientist said.

The team plans to explore how the amygdala interacts with other memory centers under different conditions. Understanding this network could inform strategies for treating memory‑related disorders and improving learning techniques.