A Swedish study published in JNeurosci, the Journal of Neuroscience, confirms early research showing that breathing and respiration are connected to perception and cognition and suggests that nose breathing may improve the transfer of experiences to long-term memories in the brain.
Researchers exposed nose breathers and mouth breathers to various odors and compared the results in a one-hour follow-up period during which they taped the mouths of nose breathers and clipped the noses of mouth breathers. They discovered that the nose breathers experienced greater odor recognition than the mouth breathers.
Although the researchers didn’t measure brain activity, the study results suggest nose breathing improves communication between sensory and memory networks in the brain and strengthens memories and memory consolidation.
Sourced from: JNeurosci