BODY & BRAIN
Scientists linked both skills to certain spots in the brain. The left orbitofrontal (OR-bit-oh-FRUNT-ul) cortex and the right hippocampus (Hip-oh-KAMP-us) were both bigger in the better smellers and better navigators. The orbitofrontal cortex has been tied to smelling. The hippocampus is known to be involved in both our sense of smell and in navigation.
The researchers separately studied nine people who had damaged orbitofrontal cortices (KOR-tih-sees). Those people had more trouble with navigation and with identifying smells, the team found. The researchers shared their findings October 16 in Nature Communications. Dahmani did the work while at McGill University. That’s in Montreal, Canada.
A sense of smell may have evolved to help people find their way around. This idea is called the olfactory (Oal-FAK-tor-ee) spatial hypothesis. More specific aspects of smell, such as how good people are at detecting faint whiffs, might also be tied to navigation, the researchers suggest.
