Fragrance Facts

Fragrance oils have been used as far back as Greek and Roman times when athletes used them to treat their muscles before and after competing. So when a sports masseuse starts wafting pretty scents around the treatment room, it’s not just for effect - the same essential oils are still used to treat muscle tension and reduce the shock that comes with sporting injuries. Massaging essential oils into muscles after exercise can disperse the buildup of toxins, flush away lactic acid and stimulate lymphatic drainage. In an everyday situation, however, fragrances such as peppermint and eucalyptus can help revive tired muscles and alleviate the fatigue that comes with prolonged physical exertion.

Smell Brain

1. Olfactory receptor neuron:

In our nasal cavity are about 40 million olfactory neuron receptors waiting to catch different odours to send them on to the olfactory bulb. Individual ORNs have a cycle of about 40 days. So there is a constant turnover of new cells occurring in the nasal passage.

2. Olfactory bulb:

As the middleman between your nose and your brain it forever transfers smell information helping you distinguish key odours from other smells that occur at the same time. Therefore it's an indispensable part of our survival instinct as humans, helping us source edible food and allowing us to detect those phantom dog smells.

3. Nasal cavity:

A large part of it has absolutely nothing to do with smell. Its primary function is to purify the air we breathe before it reaches our lungs. Therefore it's the moisture in the nasal cavity that dissolves odour particles into liquid form so that the olfactory neurons can detect them.

4. The limbic system:

Long before we can speak we develop this set of structures as children. It is an emotional memory bank – storing all our happiness, sorrow, fear, pleasure and anger – assigning feelings to different stimuli. And since scent can tap straight into the limbic system, it can evoke a certain emotion from our past without our permission.

Mental Impact

Our sense of smell is the only sense that’s directly wired to the limbic system, our emotional control centre. Other senses like touch or sight, however, require a lot of ‘decoding’ before they can be understood and elicit a response. This direct connection means fragrances have the unique ability to tap into our memories and involuntarily affect our moods, thoughts, emotions and even our mental performance. For example, if brussel sprouts caused an untimely gastric mishap at the Christmas dinner table when you were five, chances are the mere scent of the vegetable will cause you to feel queasy as an adult.

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Memory

Have you ever noticed how the slightest whiff of your first love’s fragrance can instantly recall vivid memories from your ‘forgotten’ past? With a ‘memory bank’ of anywhere between 2000 to 4000 aromas in any one human being, it’s remarkably simple to tap into one’s involuntary memory with a simple scent and bring to life the image of that cheating jezebel who left you brokenhearted when you were thirteen.

The ‘magical’ effect of fragrance on your subconscious is due to the fact that the olfactory bulb is very close to the limbic system, where all our memories – good, bad and ugly – are stored.