- Psychiatry professor Sonia Lupien of the Douglas Hospital finds that high and sustained levels of cortisol, a stress hormone, can cause atrophy of the hippocampus, leading to memory impairment.
- Margaret Lock, professor of anthropology and social studies of medicine, publishes Encounters with Aging, a groundbreaking book that examines the cultural and medical contexts of menopause in Japan and North America.
- McGill researchers Denise Figlewicz, Guy Rouleau, Jun Goto and Aldis Krizus are the first to identify a gene that, when defective, causes the hereditary form of Lou Gehrig's disease.
- McGill researcher Judes Poirier is the first to link Alzheimer's disease to apolipoprotein E (apoE), a protein found in the brain.
- McGill researchers Philippe Gros and Emil Skamene isolate a gene in the mouse that acts as a defence against a number of infectious diseases, including tuberculosis and leprosy.