
When something smells foul, vinegar flies can't perceive pleasant odors
March 15 (UPI) -- Vinegar flies can't process pleasant odors when something smells bad. When faced with conflicting odors, the repellent odor supersedes, according to a new study. Previous studies showed the brain of the vinegar fly features separate neural circuits for good and bad smells. The studies also showed multiple pleasant odors can be perceived simultaneously by vinegar flies. When scientists layered good smells, the flies altered their behavior. For the latest study, published this week in the journal Nature Communications, researchers exposed vinegar flies to conflicting smells. Functional imaging technologies allowed the scientists to observe the brains of vinegar flies as they were exposed to both good odors and smells that repel. The experiments showed the repellent odor b...