Memory Recall

Scent of a Memory

Trigger your most vivid and emotional memories using scent

By Arnie
October 25, 2019

The aroma of freshly baked brownies always brings back memories of my best friend’s mom’s cooking. When I walk by the local pool and smell the chlorinated water, I remember my childhood summers. Originally called the “Proust Effect” — after the Novelist Marcel Proust who wrote about childhood memories triggered by the aroma of freshly baked Madeleine cakes — this process was once thought of as purely involuntary.

 

But this memory process doesn’t have to be involuntary. We can play an active role. By pro-actively using scent daily in our lives, we can intensify experiences and fortify memory formation, helping to make life a richer and more enjoyable experience.

 

Memories make us who we are. Our experience of the world is shaped by our mind’s interpretation of the emotions and meaning of past events. Present day stimuli act as sensory cues to our past. They connect us to all that we cherish and the people we hold dear. Unfortunately, time and age can rob us of our ability to recall those precious memories.

 

The Science of Memory Cues

Whenever we experience something, our brain (specifically, the hippocampus) encodes sensory details (such as sounds) as part of the memory formation process. These sensory details are wired into our brains as memory cues. When you re-encounter a cue, it triggers the associated memory — along with the thoughts, feelings, and emotions that you originally experienced.

 

The great thing is that we can use our understanding of this process to purposefully manage memory formation to benefit ourselves in the future.

 

How Scent is Different from Other Sensory Cues

We all know what it’s like to hear a song that triggers a feeling and a memory. But scent is special. It is particularly good at triggering vivid memories. Why? 

For most of our senses, information processing starts at the sensing organ (such as our eyes), then moves to the brain’s ‘relay station’, the thalamus, which in turn sends each signal to the relevant sense-processing area (for example, the visual cortex in the case of sight).

 

But our sense of smell is different. Scent signals bypass the relay station completely and go directly to their processor site, the olfactory bulb. This means, unlike our other senses, there is no intermediate activity between sensing and processing. Scent-based experiences — and our memory of them — are more enhanced, more enriched.

 

The Special Connection Between Scent and Memories

Scent’s ability to trigger vivid and emotional memories is due in part to the close connection between the scent processing center (the olfactory bulb) and the parts of the brain responsible for emotion and memory — the amygdala and hippocampus respectively.

 

“The olfactory cortex in particular shares exclusive anatomical connections with the hippocampus as a result of their common evolutionary history.” Afif J. Aqrabawi & Jun Chul Kim

 

Evolution has seen fit to make scent a high priority. A not-insignificant 3% of our genes are involved in forming the 1,000 or so olfactory receptors we possess — a relatively large proportion of our total genome. In 2004, Doctors Buck and Axel won a Nobel Prize for explaining how these receptors enable us to recognize 10,000 different scents. There may be more to aromatherapy than many of us think!

 

Building Richer Memories

You can use scent to build richer, more durable memories. Next time you do something you really enjoy, think about using scent to enhance and enrich it. Say you’re going on a vacation. Pick a scent — an essential oil, an herb, or a perfume — and designate it as the ‘special scent’ for your adventure. Regularly avail yourself of the scent throughout your travels. Later, some time after returning home, break out your ‘special scent’ and see what happens. Memories — and the thoughts, feelings, and emotions that went with them — will wash over you, taking you back, and helping you to re-enjoy the experience. Try this technique with special events, people, and anything else that you want to remember. And enjoy creating the scent of a memory.

 

Want to capture a special memory? Visit CueBack to record your Memories for free.

 

Studies Referenced

  • Arshamian A, Iannilli E, Gerber JC, Willander J, Persson J, Seo H-S, Hummel T, & Larsson M. The functional neuroanatomy of odor evoked autobiographical memories cued by odors and words. Neuropsychologia 51 (2013), 123–131
  • Afif J. Aqrabawi, Jun Chul Kim. Hippocampal projections to the anterior olfactory nucleus differentially convey spatiotemporal information during episodic odour memory. Nature Communications, 2018; 9 (1)
  • Herz RS, Eliassen J, Beland S, & Souza T. Neuroimaging evidence for the emotional potency of odor-evoked memory. Neuropsychologia 42 (2004), 371–378.
  • Herz RS & von Clef J. The influence of verbal labeling on the perception of odors: evidence for olfactory illusions? Perception 30 (2001), 381–391.