Headshot of Sheena Josselyn.

Sheena Josselyn

Senior scientist, Hospital for Sick Children;
Contributing editor, The Transmitter

Sheena Josselyn is senior scientist at the Hospital for Sick Children (SickKids) and professor of psychology and physiology at the University of Toronto in Canada. She holds a Canada research chair in brain mechanisms underlying memory, and she is a fellow of the Royal Society of Canada and of the U.S. National Academy of Medicine.

Josselyn is interested in understanding how the brain encodes, stores and uses information. Her primary model organism is mice. Because several conditions (ranging from autism to Alzheimer’s disease) may stem from disrupted information processing, this basic knowledge in mice is critical not only for understanding typical human brain function, but for developing new treatment strategies for these conditions.

She received her undergraduate degrees in psychology and life sciences and an M.Sc. in clinical psychology from Queen’s University in Kingston, Canada. She received a Ph.D. in neuroscience/psychology from the University of Toronto, with Franco Vaccarino as her supervisor. She conducted postdoctoral work with Mike Davis of Yale University and Alcino Silva of the University of California, Los Angeles.

Josselyn has received numerous awards, including the Innovations in Psychopharmacology Award from the Canadian College of Neuropsychopharmacology, the Effron Award from the American College of Neuropsychopharmacology, the Andrew Carnegie Prize in Mind and Brain Sciences, and the Betty & David Koetser Award for Brain Research.

Explore more from The Transmitter

Illustration of stacks of papers.

The next unit of science: Is the scientific paper due to be replaced?

Artificial intelligence is pushing scientific publishing to the brink. For a field as sprawling as neuroscience, the crisis may also be an opportunity to finally connect findings across subfields.

By Tim Requarth
11 May 2026 | 11 min read
Neuroscientist Julieta Sztarker holds an open-air teach-in for the general public in Plaza Italia in Buenos Aires.

Funding crisis in Argentina sparks new wave of protests

Two years after the country’s research funding collapsed, scientists are demonstrating against the government’s failure to restore previously cut scholarships and increase salaries as required by a 2025 law.

By Claudia López Lloreda, Natalia Mesa
8 May 2026 | 4 min read
Conceptual image of disjointed communication.

‘Slightly unhinged’ federal autism meeting portends unclear research priorities

The meeting last week sparked concerns about the latest Interagency Autism Coordinating Committee’s ability to perform its core function: developing a strategy to support autism research.

By Daisy Yuhas
7 May 2026 | 5 min read