parosmia Archives - The Perfume Society

We all know how transporting smell memories can be – the whiff of someone’s perfume as they pass by immediately propelling you to another time, place or person you associate it with. It has long been known our sense of smell is the strongest link to unlocking these memories, but new research has only just revealed why…

An international team of scientists, led by Christina Zelano from the Northwestern University Feinberg School of Medicine, used neuroimaging and intercranial electrophysiology to discover why certain areas of the brain, such as the hippocampus, are more strongly linked with smell than any other sense. According to a report on the science news website New Atlas:

‘This new research is the first to rigorously compare functional pathways connecting different human sensory systems with the hippocampus. The striking findings reveal our olfactory pathways connect more strongly with the hippocampus than any other sense.’

‘During evolution,’ Zelano explains, ‘humans experienced a profound expansion of the neocortex that re-organised access to memory networks.’ Basically put, all other senses got re-routed as sections of our brains expanded, but smell remained intrinsically (and directly) connected to the hippocampus. Or as Zelano more scientifically puts it: ‘Vision, hearing and touch all re-routed in the brain as the neocortex expanded, connecting with the hippocampus through an intermediary-association cortex-rather than directly. Our data suggests olfaction did not undergo this re-routing, and instead retained direct access to the hippocampus.’

While this is, of course, fascinating; perhaps the more practical outcome of this, and other continuing research, is a reaffirmation of how important our sense of smell is to our wellbeing, and impacts on our every day lives even more than was previously assumed. Indeed, the discoveries of links between our sense of smell and depression (and how scent might be used in the future to treat it), has been significantly highlighted because of Covid-19 cases often suffering with anosmia (a lack of smell) and parosmia (a distorted sense of smell).

You can read more about anosmia and parosmia on our website by searching for those terms, and also in Louise Woollam’s piece about how devastating it was to lose her sense of smell as a fragrance blogger. It’s a subject Louise wrote about so movingly, again, more recently for our magazine, The Scented Letter: Perfume’s Bright Future edition. VIP Subscribers receive this magazine FREE, but you can also buy print copies, here, or purchase an International Online Subscription at only £20 for a full year of fragrant reading.

By Suzy Nightingale

Up to 80% of what we taste is actually relayed through smell, and a FREE cookbook, Taste & Flavour, has been written to help those who’ve lost their sense of smell following Covid…

When it first came to light that many of those people who’d had or were still suffering with Covid-19 were experiencing loss of taste and smell, Life Kitchen said, ‘our first thought was – what can we do to help?’ Having undertaken extensive research, and garnered the help of experts such as Professor Barry Smith, from the University of London, the anosmia (smell loss) charity Abscent, and Altered Eating; it was ‘discovered that Covid-related taste and smell loss has some distinctive features.’ These included people who ‘found they didn’t want to eat certain, quite common ingredients, including onions, garlic, meat and eggs,’ while additionally (and upsettingly), ‘certain foodstuffs seemed to trigger parosmia (changes to or distortion of the sense of smell), anosmia (loss of smell) and phantosmia (smelling something that isn’t there).’

The loss of smell (and therefore taste) has been devastating to those already suffering other symptoms and feeling isolated, and we’ve written several articles on anosmia and parosmia previously, including an explanation of the help Abscent can offer – with anosmic Louise Woolham writing a feature in our just-published edition of The Scented Letter magazine. The idea behind the book, the authors say, is to be ‘a collection of recipes, ideas and expertise to help you on your journey towards enjoying food again.’

As Life Kitchen comment, and we know from the reports of many post-Covid patients: ‘Any of these olfactory conditions can have a profound knock-on effect for physical and mental health.’ So, what to do for immediate and – most importantly – practical help if you’ve lost your sense of smell and can’t taste the food you once enjoyed…?

Ryan Riley and Kimberley Duke worked with the smell and taste experts, to produce this recipe and self-help book. And – SO generously – they’ve not only produced printed copies you can purchase on the website for only £3.00 to cover postage costs, but have made a digital copy FREE to download, so they can help even if you can’t afford the book right now, and no matter where you are in the world.

‘Using our five principles of taste and flavour – umami, smell, stimulating the trigeminal nerve (responsible for sensation in the face), texture, and layering flavour’ they explain, ‘we’ve taught over 1,000 people with cancer to enjoy food again. We wanted to apply these principles to create recipes for those people who have lost their senses of taste and smell as a result of Covid.‘