Why do certain smells trigger powerful memories?

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Why do certain smells trigger powerful memories?


The group hopes that this work will contribute to the event of remedies for odor dysfunction and loss which has gained particular consideration within the period of COVID-19.

Have you ever smelled a flower and been all of the sudden flooded with a childhood reminiscence or did a certain odor of curry remind you of your grandmother? A brand new examine has now decoded why and the way the mind does this.

The researchers present that in people there’s distinctive connectivity between the hippocampus within the mind which performs a serious position in studying and reminiscence and the olfactory system (the sensory system used for smelling).

Guangyu Zhou, from Northwestern University in Chicago, explains the method intimately in an e-mail to The Hindu: “During evolution, primate brains (including humans) massively expanded, developing the neocortex. Due to this expansion, direct connections between sensory areas and the hippocampus also expanded…In our study, we compared how the olfactory system connects to the hippocampus with how other sensory areas (vision, hearing and touch) do. We found that olfaction had stronger functional connectivity with the hippocampus than these other sensory systems.” He is the primary creator of the examine.

The group writes that this robust connectivity is sort of a superhighway from odor to the hippocampus and often is the purpose why odours can powerfully elicit reminiscences. The outcomes had been printed within the journal Progress in Neurobiology.

“Another fascinating finding from our study is that with every inhale, connections to our brain’s memory centres strengthen. We found that the connectivity between the olfactory cortex and hippocampus changes rhythmically with natural breathing. This is interesting because it shows that something as fundamental and natural as breathing is intimately connected with how memory works in our brain,” says Christina Zelano, Assistant Professor within the Department of Neurology at Northwestern University and senior creator of the examine in an e-mail to The Hindu.

The group hopes that this work will contribute to the event of remedies for odor dysfunction and loss which has gained particular consideration within the period of COVID-19.

“We plan to further investigate a special link between breathing rhythms and brain rhythms. Inhaling and exhaling, especially through your nose, generates rhythms that move through your brain and change how your brain works. We are interested in comparing nose breathing with mouth breathing, and better understanding how these respiratory rhythms affect the brain,” provides Guangyu Zhou.

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