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Proust's 'Involuntary Memory' Explained by Science Experiment with Humans and Mice
🇬🇷 Greece /Health & Science

Proust's 'Involuntary Memory' Explained by Science Experiment with Humans and Mice

From Ta Nea · () Greek

Translated from Greek, summarized and contextualized by DistantNews.

At a glance

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  • Scientists have experimentally investigated the phenomenon of "involuntary memory" described by Marcel Proust.
  • A study published in PLOS Biology used questionnaires from over 600 people and experiments on 272 mice to explore how childhood smells are intensely remembered.
  • The research identified a specific class of neurons in the olfactory bulb with unique developmental characteristics, suggesting a biological basis for strong olfactory memories formed in early life.

A team of neuroscientists in Lyon, France, has sought to scientifically explain the concept of "involuntary memory" that author Marcel Proust famously described. In his novel "In Search of Lost Time," Proust detailed how smelling a madeleine cake dipped in tea triggered vivid childhood memories of the fictional town of Combray. He termed this phenomenon "involuntary memory," exploring why certain scents from childhood remain intensely imprinted, while most fade.

The study, led by Nathalie Mandaron from the Lyon Neuroscience Research Center at France's CNRS, was published in PLOS Biology. It combined data from over 600 individuals who answered questionnaires about their earliest olfactory memories with experiments involving 272 young mice. The mice's olfactory systems were used as a model due to their similarity to human systems. The research specifically focused on smell, acknowledging that much of what we perceive as taste is actually smell perceived as food is chewed.

Involuntary memory

— Marcel ProustThe phenomenon described by Marcel Proust in "In Search of Lost Time."

The experiment involved exposing young mice, aged 23 to 30 days (comparable to pre-adolescence in humans), to the pleasant scent of citronella in a stimulating environment with toys, food, and social interaction. These mice later showed a clear preference for the scent upon reaching adulthood (60-80 days old), suggesting recognition. Mice that did not have this early exposure remained indifferent to the same smell later, indicating that, like in humans, memories need to be built through repetition in early life.

Researchers examined the brains of the mice and identified a particular type of neuron in the olfactory bulb. Unlike most neurons, these do not form during early development but are generated later, a characteristic that scientists believe may be linked to the formation of strong, lasting memories associated with specific smells encountered in youth.

Why do some childhood smells become so intensely ingrained in memory that they accompany us throughout life, while most are lost without a trace?

— Nathalie MandaronThe central question posed by the neuroscientists in their study.
DistantNews Editorial

Originally published by Ta Nea in Greek. Translated, summarized, and contextualized by our editorial team with added local perspective. Read our editorial standards.

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