Amygdala activity predicts which images become lasting memories

Investigators matched later recall against the earlier neural activity, then replicated the relationship in two separate datasets.

The unusually large collection of single-neuron recordings came through a multi-institutional consortium led by Cedars-Sinai Health Sciences University and supported by the National Institutes of Health Brain Research Through Advancing Innovative Neurotechnologies, or BRAIN, Initiative.

Jiayang Xiao, PhD, led the research as first author. Mauricio Rangel-Gomez, PhD, an NIH program officer, offered this assessment:

“This is an impactful study that provides mechanistic insight into the role of the human amygdala—a region commonly associated with emotional responses—in determining which experiences and stimuli become lasting episodic memories. This rigorous human neuroscience study, which uses next-generation tools, has high potential to move discovery toward measurable health impacts,” said Mauricio Rangel-Gomez, PhD.

Episodic memory means the recall of specific experiences or events.

The paper, “Stimulus-specific recruitment of human amygdala neurons predicts episodic memory encoding success,” appeared in Nature Neuroscience on October 27, 2026. Its authors are Jiayang Xiao, Jonathan Daume, Yousef Salimpour, Natalia Kurilenko, Clayton Mosher, William S. Anderson, Taufik A. Valiante, Adam N. Mamelak and Ueli Rutishauser. The DOI is 10.1038/s41593-026-02493-9.

NIH BRAIN Initiative grant U01NS117839 supported Rutishauser’s work, while a Cedars-Sinai Center for Neural Science and Medicine Postdoctoral Fellowship supported Xiao.

Adam Mamelak, MD, said: “This study’s insights are the latest in a long line of research led by Cedars-Sinai and collaborators dedicated to revealing how human memory functions.”

Takeaway: Two separate datasets and a 112-patient recording collection supported the same amygdala-memory association.

Could the amygdala become a treatment target?

The results also suggest a clinical route: disrupted amygdala activity may contribute to memory problems in neurological disorders. The study did not test a treatment.

“Our findings have important clinical implications, as the memory impairments seen in disorders such as Alzheimer’s disease and temporal lobe epilepsy might be partly due to disrupted processes within the amygdala,” said Rutishauser, also a professor of Neurosurgery.

“The amygdala might therefore be a suitable new target for treating these disorders using neuromodulation and/or cellular therapies.”

Neuromodulation means adjusting nervous-system activity; cellular therapies involve changing or replacing cells.

Researchers would need to establish whether changing those responses can improve recall. The observed relationship alone does not prove clinical benefit.

Takeaway: The amygdala is a possible treatment target, but the study offers a mechanism, not a therapy.

What remains unknown?

The current experiments tested only vision. Rutishauser said future studies could ask whether the same selection process governs sounds and smells.

The recordings establish a relationship between neuronal responses and later recall. They do not show that modifying those responses will improve memory; that requires further research.

Because the experiments involved images, the team has not established whether amygdala activity selects memories across different senses.

Takeaway: Memory selection may extend beyond emotion and vision, but treatment effects and cross-sensory effects remain untested.