Why smell jumps the queue when it comes to memories

Smells hardwire deep into the brain, writes Henna Cundill, as she explores why they jump-start such vivid memories.

Henna Cundill

Henna is a researcher with the Centre for Autism and Theology at the University of Aberdeen.

An autumnal scene of a church yard and church framed by leafless trees.

'The smell of dust and damp stone will always cry “safety!”'

Jakub Pabis on Unsplash.

When I was a 22-year-old undergraduate my mother died quite suddenly. I can't remember the name of the undertakers we used, nor the chaplain who took her funeral. I can no longer visualise what any of their faces looked like. I know I visited the chaplain’s house to plan the funeral, but I can't remember exactly where that house was. What sticks is that the day of the funeral was a sultry summer's day, and both the chaplain and the undertakers smelt of perspiration. To this day there are moments where I catch that same whiff of man-sweat in some other location, and for a fleeting second, I am a bewildered 22-year-old once more.

Here is another memory. I attended a tiny, rural Church of England primary school in the middle of England. At the end of each school year, all of us donned our little Wellington boots, which smelt faintly of slurry (since this was dairy-farming country) and sweaty feet. Then we lined up in a crocodile and trudged through the bluebell-wood (damp leaves) and skirted the edge of fields (silage, which stings the nose) covering the mile or so between our school building and the village church.

We would enter the church grounds through the back field, hurrying through an eerily muffled graveyard with tombstones towering far above our heads and the grass disturbingly lumpy beneath our little feet. To the chidings of “Quickly!” and “Quietly!” we children scurried down a gravel path, away from this unsettling place of death, to reach the cool sanctuary of a little church, and the comforting smells (for me, at least) of damp stone and dusty hymnbooks.

Others may not have the same associations, but for me the smell of dust and damp stone will always cry “safety!” and the reassurance that “there are no ghosts in here!” in contrast to that troubling graveyard. From death to life. Yet, at the same time, getting stuck with my nose close to some man’s whiffy armpit on the Tube will forever insinuate that I am just a child pretending to be a grown-up, out of my depth, overwhelmed with one thousand decisions to make (“What flowers do you want for her coffin?”) and no-one to advise. In the midst of life, death again.

On reflection I will know that my emotions are being manipulated by my nose, in ways which are more or less than helpful depending on the circumstances.

Of course, I am not 22 years old and lost anymore, no matter what that man’s armpit tries to tell me. My rational mind knows better, but my rational mind doesn’t get a say – or doesn’t get the first say anyway. This is because smell is the only one of our senses that bypasses the thalamus (the brain’s ‘filtering gate’ that decides which part of the brain needs to respond to sensory input) and goes straight to the limbic system, where emotional memory is stored.

Sometimes it is very obvious that this is taking place, such as in the examples given above. On reflection I will know that my emotions are being manipulated by my nose, in ways which are more or less than helpful depending on the circumstances. But it can happen in more subtle ways too. Supermarkets infamously pump out smells to influence our buying choices, and we’re trying to sell our house right now, so we’ve been brewing a whole lot more coffee than we ever usually would.

Intriguingly, scientists don’t really know why the human sense of smell jumps the queue when it comes to cognitive processing. There are biological theories, such as that the smell of predator could wake up our ancestors while they were sleeping and/or could allow them to follow a scent trail quickly when fleeing danger or seeking food. There are social theories too, such as that we don’t have a lot of good words to describe smells, so the brain just doesn’t bother trying to analyse them. Whatever the truth of the matter, the reality is that (whether we like it or not) our noses are an emotional trip-hazard.

When I walk through those great oak doors there is a moment, a glitch in the matrix, when the unmistakable smell of church hits my nose. Dust, damp… a little hint of mouse.

I can’t help wondering what this tells me about my religious practice. Do I go to church because I have made a cognitive decision to worship God each Sunday? Or do I go to church because I am following my nose, getting away from a world full of armpits and responsibilities to a place where I am a seven-year-old girl, all gingham dress and wellies, feeling safe. If so, does it matter?

Truth is, my mind can give me a dozen reasons not to go to church every single week. In fact, two dozen reasons. More. It has always been a busy week; I’m always behind on work. The house always needs a sort out and the car is never washed. But because certain congregation members are normally counting on me for certain things, and because I’m still pretending to be a grown up, I typically drag myself out the door, and off to church I go.

And week on week, without fail, when I walk through those great oak doors there is a moment, a glitch in the matrix, when the unmistakable smell of church hits my nose. Dust, damp… a little hint of mouse. My body registers this before my mind; my shoulders drop a little of their tension. Even if it’s just for a fleeting moment, I start to feel that I know for sure what is absolutely real in my life and what is just pretend.

Is this knowledge irrational – since it doesn’t come from the cognitive part of my mind? Or is there a God who knows that the cognitive part of my mind sometimes tells me all sorts of untrue and unhelpful things. Is there a God who is choosing to reach out to me in more subtle, more ancient ways?

I can only wonder if I have been following my nose all this time, without even noticing. Drawn along by an ancient scent trail that leads me time and time again…this way…and that way…until I reach a place where there is safety, and bread.

Review

Books

Culture

29 April 2024

6 min read

Are we being anxious about anxiety?

Haidt's diagnosis of a 'doomed' youth is off. Instead, we should learn from them.

Henna Cundill

Henna is a researcher with the Centre for Autism and Theology at the University of Aberdeen.

A child sits atop a bunk bed holding a phone in front.

It’s common these days to hear about social anxiety, health anxiety, or climate anxiety – but I think I can see that a new pathology is beginning to emerge: anxiety anxiety. This is where parents, politicians, academics, or just members of society in general, start to get anxious about the fact that everybody is anxious. Diagnosis rates of clinical anxiety have shown a steep increase in the past decade, and numbers, we assume, don’t lie.

Of the many outcomes of ‘anxiety anxiety’, one is going to be people who (with the absolute best intentions) want to suggest solutions. One such person is Jonathan Haidt, with his book The Anxious Generation: How the Great Rewiring of Childhood is Causing an Epidemic of Mental Illness.

From the spaceman on the cover to the opening vignette about sending our children to Mars, Haidt’s premise is clear: smartphones are the alien invaders of our society. These electronic parasites are feasting on the brain matter of our young people, directly causing what is now an epidemic of clinical anxiety and depression.

I’m quite ready to read a sensible analysis of the impact of smartphone culture on mental health, so I was disappointed to find that Haidt’s book falls so far short of that. From a scientific perspective, the argument is a barrage of statistics, arranged to the tune of ‘correlation equals causation’. Given Haidt’s seniority in his field, this approach is surprisingly unsubtle, something which has already been heavily criticised by peer review. Numbers, it seems, do lie – or at least they can be easily curated to prove your point.

But even if we accept Haidt’s point – which is that rates of smart-phone use (particularly social media) and rates of young people being diagnosed with anxiety disorders have increased over the same time period – what can be done? Haidt’s solution is to ban young people from owning smartphones at all until the age of 14, and from using social media until the age of 16, or even better 18. In this way, owning and managing one’s own device and its access becomes a rite of passage into adulthood. But note: whilst parents are urged to implement these unyielding boundaries for their children’s device-habits, Haidt does not ask grown-ups to make any changes to their own. Adults can continue with their current norms of smartphone use, ostensibly because their brains are fully developed, and they therefore have the maturity to handle their own risk to mental health.

Smartphones are not aliens – they were designed by humans, and are willingly bought by humans, in response to the human need to communicate.

Of course, it does not suit Haidt’s argument to analyse why adult mental health is also seeing an increase in diagnosis of anxiety disorders. It may be true to say that rates are rising more quickly amongst young people, but there is still no consensus as to how much of that can be attributed to young people simply being better informed about mental health and more empowered to seek help than the generations before them. Noticeably, young people today have a language to talk about anxiety that simply didn’t exist when I was a teenager in the 1990s, and ironically enough, it is social media that has made that possible. Although suicide rates are on the rise, they are still quite significantly lower among young people than they are for those aged over 35, and it should be noted that a proven pathway to suicide prevention amongst young people is access to self-help via smartphone apps.

So whilst I am quite ready to believe that smartphone culture is one of many factors impacting the health and wellbeing of young people today, I think characterising smartphones as alien invaders, or as invasive parasites that have been selectively bred by Silicon Valley billionaires to infest the minds of our young people, seems to be a disingenuous response – and one that only serves to increase parental anxiety by implying that smartphones are sly, sentient beings, and out of our control.

Smartphones are not aliens – they were designed by humans, and are willingly bought by humans, in response to the human need to communicate and a perfectly natural human desire to seek out entertainment and culture. True, technology and software are developed by billionaires, and marketing and algorithms can influence our choices – but at the end of the day, any developer will tell you that products only ever evolve in response to what the market demands. Adults: we have the money in our pockets; we are the market.

As a more empathetic and intelligent generation, it seems they could probably teach us a few things about how to harness smartphone culture.

In other words, we (the adults) selectively bred these ‘aliens’ ourselves – and rather than try (and no doubt fail) to lock up our experiment in a lab (or, as Haidt suggests, a lockable phone-pouch) we, the adults, have more than enough agency to continue that process of developing smartphones into devices that meet needs and provide entertainment in the way that they were always meant to do. In his defence, Haidt does refer to this approach briefly, but still only with a view to making the phones be for ‘us’ (the adults) and not ‘them’ (the young people) by removing content that appeals to a younger audience. To me feels like we are victim shaming the youth of today for the fact that they have inherited a problem created by their parents.

One day when Jesus was teaching a crowd of followers, he advised them “Why do you look at the speck of sawdust in your brother’s eye and pay no attention to the plank in your own eye? How can you say to your brother, ‘Let me take the speck out of your eye,’ when all the time there is a plank in your own?” His point was about hypocrisy – it is far easier to judge someone else’s behaviour than it is to take responsibility for our own. Where did any of us last read or hear terrifying information about the decline in young people’s mental health? Was it on our smartphones?

Here are a few things that Haidt’s selection of statistics doesn’t say about the youth of today. They are the most compassionate and empathetic generation that we have seen for decades (Konrath et. al., 2023). They are able to wait longer for rewards than their parent’s generation (Protzko, 2020), they are also less lazy, less narcissistic, more cooperative and more intelligent (Kriegel, 2016). In addition, whilst obvious damage is done by ‘filters’ on Instagram photos, making some young people strive for unattainable standards of beauty, it was the previous generation of smartphone users who began this trend, and it is the current generation of young people who can be credited with the #nofilter #nomakeup countertrends. This same generation is now fuelling the rise of insurgent social media sites such as Bereal, which emphasise the importance of authentic photos and meaningful connection with friends online.

Overall, perhaps instead of restricting and controlling our young people’s online lives, as Haidt would have us do, we ought to be talking to them? As a more empathetic and intelligent generation, it seems they could probably teach us a few things about how to harness smartphone culture and develop it towards solutions to the problems that we ourselves created.