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.

The felled tree: decoding the destruction

The deliberate felling of an iconic tree is a story that author Theodore Brun had heard somewhere before, prompting him to explore the reactions to it further.

Theodore Brun

Theodore is author of the historical fiction series The Wanderer Chronicles.

A felled decidious tree lies sprawled on the ground. The freshly sawn stump and roots are in the foreground

The stump of the felled sycamore tree.

Wandering wounder, CC BY-SA 4.0, via Wikimedia Commons.

News of the felling of the Sycamore Gap Tree was greeted across the country with shock, sadness and disgust. Shock at the wanton vandalism; sadness at the loss of an iconic feature of our British Isles; disgust at the kind of nihilism it must have taken in the mind of whoever did the deed. Predictably social media blew up. I blew up with it. This was ‘our’ tree - held which such affection by those of us who knew it across the nation as to be almost sacred. The spiteful disregard for that affection felt truly shocking.

The most natural reaction to this is anger. “Throw the book at whoever did it!’ was the general feeling - whether it was the 16-year-old boy first arrested or the 60-year-old man detained later. No motive could justify such a mindless act.

But then came the double shock for me. A jarring recollection that it was the story of the felling of another great tree that had been the seed of inspiration from which grew my entire historical fiction series, The Wanderer Chronicles. And in that story, the man doing the felling seemed to me something of a hero. The tree in question was a mighty oak, dedicated to Donar (better known as Thor) the god of thunder, which once stood in the province of Hesse in central Germany. In the early 8th century, an English missionary, known to history as St Boniface, took an axe to Donar’s Oak, a sacred place of worship to the local pagan inhabitants, even as a large crowd of them stood by raining curses on his head. Boniface would have justified his act of vandalism on religious grounds: the tree was the site of horrific human sacrifice and rituals of witchcraft, and must be destroyed, in part to prove the impotence of this pagan god.

Shocking as his act must have been, Boniface’s aim was not to offend. It was to overthrow. To overthrow a system of religious and spiritual oppression. A system of cruelty, death and bondage. In a sense, it was an act of expulsion of false gods who demanded everything and promised nothing in return. That would have been his justification, at least. And in its place, he intended to plant a new culture of faith, freedom and forgiveness; of truth and love. It’s telling that he used the timber from the fallen oak to build a church.

The event marked the beginning of the widespread destruction of many sacred groves and other places of pagan worship in the decades that followed, symbolic of the supplanting of one pre-existing culture by another, more powerful culture on the rise.

So, can Boniface’s good intentions be distinguished from the apparently nihilistic felling of the Sycamore Gap Tree in our own day? I think they can. But no doubt many would disagree.

After all, these days, we find the idea of one culture asserting itself over another almost as abhorrent as the human sacrifice Boniface was trying to suppress. Certainly, to post-modern sensibilities and values, religious motivations no longer justify any kind of cultural vandalism. Few would have much sympathy for the Taliban’s destruction of the Buddhas of Bamiyan in 2001. Nor for the deliberate arson attacks in the mid-nineties on over fifty churches in Norway by neo-pagan Black Metal bands. Even today, the demolition of a Palestinian mosque by Israeli shells as an act of retaliation attracts media opprobrium, no matter the human death toll that provoked it.

So, is there any good for which vandalism may be justified?

In a world and culture that feel ever more divided, perhaps the Sycamore Gap Tree, even in its destruction, can give us some hope, some fleeting moment of cultural unity.

The protest actions of environmental groups like Just Stop Oil or Extinction Rebellion fall into that vein, and strongly divide opinion. They proclaim a new gospel of environmentalism. Turn around, mend your ways, and be saved. (Although is it really just an old message of paganism: Appease the gods of sun and thunder or else face oblivion?) In any case, it’s a message burning with no less zeal than did old Boniface’s. And while they may not agree with their methods, many would at least agree with their cause and motive. The question is: how far can you stretch a point?

The fact is that there is much that we do not agree on. Borders, taxation, healthcare, education, marriage, sex and gender, even what constitutes a human life. Cultural divisions seem to grow only wider. Increasing mistrust has us standing in opposition to one another - vitriol and disdain filling the space between us. Two tribes in a stand-off. Rather like the two hills that form the gap where that beautiful tree stood until last week. The gap is empty now. The tree is what brought them together. The tree was what completed the whole scene. Without it, we see only the empty air between the two opposing hills.

In a world and culture that feel ever more divided, perhaps the Sycamore Gap Tree, even in its destruction, can give us some hope, some fleeting moment of cultural unity. Trees still represent to us an essential good. Their existence transcends the passage of our short lives. They stand through storm or shine. They sink their roots deep into the good earth. They stretch their limbs up to the skies. They are a metaphor for a life well lived.

The felling of this iconic and beautiful tree is a pang we can all feel, the more so because it seems to have been done as a naked act of vandalism with - so far - no justification offered. Maybe this then is its greatest legacy: that, rather than reaching for the easy emotions of anger and blame, we can transcend our differences for just a moment. And allow ourselves to be reminded that, more than we ever realised, we loved that old tree. And we shall miss it now it’s gone.

If we can all feel that, perhaps there’s hope for us yet.

The Sycamore Gap Tree as was.