The Williamson Lab studies astrocyte biology across development, cognition, and disease.

Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...

455 likes, 0 comments - uoft on May 7, 2026: "What if the brain had a filing system for memories of people in our lives — and understanding it could change how we approach complex neurological conditi...

Professor - Computational Cognitive Neuroscience

Recent advances in reinforcement learning (RL) have demonstrated impressive capabilities in complex decision-making tasks. This progress raises a natural question: how do these artificial systems comp...

Our experience of the world is a continuous stream of events that must be segmented and organized at multiple timescales. The neural mechanisms underlying this process remain unknown. In this work, we...

And This Year's Politics (video and commentary)

New data on brain-wide circuits centred around two interconnected hypothalamic neuron populations provide significant mechanistic insights into the emergence of social need during social isolation and...

The posterolateral cortical amygdala and other connected brain regions have a key role in mediating the transition from investigative to aggressive behaviour in male mice.

At a conceptual level, LLMs profoundly change the landscape for theories of human language, of the brain and computation, and of the nature of human intelligence. In linguistics, they provide a new wa...

Fraser et al. demonstrate that contexts engage a model-based process that allows for rapid revaluation of reward-paired cues. They find that dopamine neuron activity is necessary for contexts to updat...

Contingency (or “luck”) in early life plays an important role in shaping individuals’ development. By comparing the developmental trajectories of functionally genetically identical free-living mice wh...

Animals rely on both innate and learned behaviour to respond optimally to their environment. However, little is known about how the brain may reconcile the ability to produce hardwired responses essen...