Article
Culture
Psychology
Weirdness
5 min read

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.
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. 

Article
Attention
Culture
Digital
5 min read

Let me level-up about playing games on my phone

Like all art, there's no standard for 'good', but good art doesn’t leave you puzzling over how you wasted an hour.

Mark is a research mathematician who writes on ethics, human identity and the nature of intelligence.

A gamer plays on a phone.
Onur Binay on Unsplash.

Earlier this year I got a bit too into a mobile phone game. In the game, I was master and controller of a small virtual grid of assorted shiny objects. By the flick of my finger on the screen, I’d swap the objects to try to match groups together. If I did this in the right way, then the matching objects would merge into shinier ones which would help me win the game. I’d want to know what the next shiny thing would be and how I could use it to beat the next level. 

I first started playing on my commute to work – usually I like to read or write and listen to music and sometimes to catch up on emails – but on that day I felt too tired for any of that. The puzzles started easy but got gradually harder. They were challenging enough to occupy the mind, but never felt too taxing, and the satisfaction-hit from each small win along with the visuals and sound-effects made me really want to keep playing. On the train home, it felt easier to just open the app and play a few levels than do anything else. I’d start the journey by telling myself I’d do a few levels and would do something else, but I’d easily spend the best part of the journey rearranging shiny objects. 

I knew this wasn’t ideal. I’ve come to see my commutes as a rare unfilled moment, each a scrap of time, a space to read and think, and I was filling this gift with a pixellated dopamine hit. I’d try to stop and bargain with myself – setting a limit of say five levels per journey, but knowing this to be an arbitrary number, I’d blow straight through it. There are other empty moments, waiting for the bath to run or once the children are in bed, but these other scraps are empty only in appearance, and I started to play in these too. 

My phone has a ‘sleep mode’ which tries to mitigate the by now well-documented negative effects of phone use on sleeping – lower sleep quality, duration and interference with circadian rhythms. In sleep mode, you choose a time – after this the colours of your phone will be replaced by black and grey. I started using this feature, thinking that at least if I dulled the bright colours to greys then I’d take the enjoyment out of playing and it’d be harder to tell the shiny squares apart. It was a good try, but it didn’t work. I learnt to tell the grey objects apart, and played on. 

Mainly, what I'm not doing when I’m glued to my phone is engaging with life.

You’ve heard it before, but our devices are not that good for us – excessive smartphone use fuels depression, anxiety and insomnia, and the average teenager spends seven to eight hours a day in front of a screen. Smartphones are closely related to social media - a recent study found one in six adolescent girls showed signs of social media addiction. Smartphone use has become a well-worn topic with a familiar set of talking points: How lucky we are to have all the world’s knowledge in our pocket; how bad we should all feel about being so distracted; how smug we can feel about the fools stuck to their phones. These discussion points aren't new - many of the concerns about smartphones and screen-time started decades earlier in response to TV and video games. 

These concerns are certainly valid, but I find it easier to consider what some of my smartphone habits are stopping me from doing. I'm not sure I'd advocate that we all stop using smartphones - having easy access to the Internet is a huge convenience, but I do pause to think about what I'm not spending time doing when I obsessively scroll or click. I'm also not convinced that all mobile games or even all social media use is bad. Computer games can be entertaining and thought provoking. Like all art, there's no globally agreed standard about what's good, but good art doesn’t leave you puzzling over how you wasted an hour. What differentiates social media and certain phone games is their business model – your time and attention is their revenue stream. 

Mainly, what I'm not doing when I’m glued to my phone is engaging with life. If I put the phone down, I could be more attentive to the people I'm with – be able to listen to all the subtle ways we tell each other how we are – in short, I could be more fully present. I could read books, and I could read whole magazine articles or news stories on my phone, actually stopping to read rather than scrolling from headline to headline. Or I could do nothing and just be, undisturbed. If I’m commuting, I could enjoy the scenery or just let my mind wander. And I can remember that even in the quietest moments I'm not alone - God is always alongside us, and we can always spend time and speak to Him in prayer. Even for a few short moments to lift up the joys and troubles of the day. 

“Well”, you may say, “That's all very nice hearing about these possibilities I could enjoy if I clawed back time from social media and freemium games. But how do I actually do it!?” Most of the answers I’ve found to this involve either stopping the habit completely – deleting the app or even not having a smartphone, or else they involve enforced periods away. Some have found that a digital detox of several days or weeks has helped to reset their relationship with tech, others set fixed times in their day when they can and can’t use their devices or certain apps, and some observe a “digital sabbath” where they intentionally avoid or reduce technology use for a full day each week. 

As for me, my only way out was to delete the shiny object game, losing all record of all 1,500 completed levels. Given that I rejected my own help by outsmarting “night mode”, I doubt moderation would have helped. Unsettlingly, my fingers and part of mind really seemed to miss it. As I unlocked my phone, I’d feel a tinge of absence, as though checking my emails or messages didn’t have the same grip as matching colourful blocks 

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