
Research & Reports
Acute particulate matter exposure diminishes executive cognitive functioning after four hours regardless of inhalation pathway. Nature Communications.
T. Faherty et al. (February 2025) examined the effects of short-term particulate matter (PM) air pollution exposure on brain function by exposing participants to either high PM concentrations or clean air for one hour, with and without restricted nasal inhalation. Cognitive tests conducted before and after exposure showed significant declines in selective attention and emotion expression recognition following PM exposure, while working memory and cognitive speed remained unaffected. The findings suggest that PM pollution primarily impairs cognitive function through lung-brain pathways rather than olfactory mechanisms.