The introduction is also posted on Spotify as a podcast by “Gerry at The Health Equation”
You can search Spotify for “Gerry at The Health Equation”
Or use the link below
https://podcasters.spotify.com/pod/show/gerrygaj
Below is the specific link
Gerry Gajadharsingh writes:
“A very interesting recent article by Dr Perry Wilson on Medscape discussed recent research published in Current Biology. Researchers led by Timna Soroka created a device, which precisely measures the airflow in and out of each nostril.
The researchers wanted to know whether the 24 metrics derived from someone’s breathing pattern could be used to identify them. Can breathing act like a fingerprint?
The results were impressive.
If airflow patterns were random, the machine would only get this right 1% of the time. Instead, it was correct 91% of the time. This approaches biometric levels of accuracy, similar to voice recognition.
These unique respiratory fingerprints were stable over time. Forty-two of the participants came back for another round of 24-hour monitoring, somewhere between 5 days and 2 years later. The system could identify who was who with 95% accuracy even all that time later. This is perhaps where the research falls down. I spend a fair amount of time educating patients in behavioural change including changing their pattern of breathing. As they go through a spell of treatment and I reassess their breathing patterns they have definitely changed, when I look at their matrix regarding the End Tidal CO2 levels and breathing rate, ratio between the length of inhalation and exhalation and the pauses between inhalation and exhalation. As a consequence, I doubt whether patients who have engaged in changing their breathing behaviour would still have their unique respiratory fingerprint when they were first assessed.
Our psychology changes how we breathe as well. The researchers divided people into low and high scorers on the Beck Depression Inventory. The fastest rate at which we breathe in, was substantially higher in those with more depressive symptoms.
It didn’t stop with depression. The researchers could distinguish between people with high vs low anxiety scores by looking at the variation in their inspiratory pause.
And you could determine who was more likely to have autistic features — again, none of these individuals had clinical autism — by looking at the percentage of breaths with an inspiratory pause.
We are all unique individuals with a unique physiology and psychology. As a consequence, what we should aim for is individual individualised medicine. Exploring a person’s breathing pattern is, in my opinion quite an important part of the diagnostic process and this latest research back this up. The impact of psychology influences our breathing and the impact of breathing influences our psychology.
For a system (the respiratory system) that has such profound effect on our physiology and psychology I continue to be surprised why it is not more routinely used in more aspects of clinical medicine.”
https://www.thehealthequation.co.uk/heart-rate-variability-hrv-and-capnometry/
Medscape
Dr Perry Wilson
You don’t need to think about it until you think about it: breathing. The most fundamental physical function. The most basic act that our bodies undertake to keep our brains alive, exchanging cardon dioxide for oxygen, nourishing every cell inside us.
The reason you don’t need to think about breathing is because of an area of the brainstem called the pre-Bötzinger complex. It’s a group of cells that acts as a pacemaker clicking off about 12 times a minute, triggering your body, without conscious thought at all, to breathe.
Of course, you know it’s more complicated than that. You can hold your breath, after all — you are in control of the process. And it’s more complicated than that. Higher levels of your brain feed into the pre-Bötzinger complex to increase your breathing rate when your body is moving, or when energy expenditure goes up.
And it’s even more complicated than that. You may never have noticed, but when you are breathing through your nose, you’re mostly breathing through one nostril at a time, oscillating back and forth, allowing one nasal passage to regain some moisture while the other does the work.
For something you don’t think about at all, breathing is taking up a lot of brain space.
Could these complex respiratory patterns reveal something, then, about the state of our brains? Are all the yogis and gurus and influencers right about the importance of how we breathe? Is the breath the window to the soul?
If you want to really interrogate the way we breathe, you need to do some pretty precise measurements — which is why I was so intrigued by this paper, appearing this week in Current Biology.
The centre piece of the article is a new technology: a nasal cannula, but not of the sort you’ve seen before.
Researchers led by Timna Soroka created this device, which precisely measures the airflow in and out of each nostril. They recruited 100 people to wear it for 24 full hours.
At a sampling rate of 6 Hz, this is a ton of data. In fact, compressing that stream of data into interpretable metrics is a feat in and of itself. The primary analysis derived 24 different measures from this airflow data. Some of these are intuitive: the volume of air inhaled and exhaled, the rate of airflow, the rate of oscillation between one nostril and the other.
Some metrics are less obvious: the coefficient of variation of the breathing duty cycle, for example, appears to quantify how much one breath changes compared to others.
Our brains are unique, and, it turns out, so are our breathing patterns. The researchers wanted to know whether the 24 metrics derived from someone’s breathing pattern could be used to identify them. Can breathing act like a fingerprint?
The results were impressive.
If airflow patterns were random, the machine would only get this right 1% of the time. Instead, it was correct 91% of the time. This approaches biometric levels of accuracy, similar to voice recognition.
These unique respiratory fingerprints were stable over time. Forty-two of the participants came back for another round of 24-hour monitoring, somewhere between 5 days and 2 years later. The system could identify who was who with 95% accuracy even all that time later.
This is all pretty cool, but let’s be honest: You’re never going to unlock your laptop by strapping a nasal cannula to your face and breathing for a while.
Where this study gets really interesting is in the links between breathing parameters and other physical and psychological parameters.
For example, the breathing pattern was associated with body mass index. People with a higher BMI had a higher tidal volume — a larger volume of air during a typical respiration — than people with a lower BMI.
That makes some sense. People with more mass might need to exchange more air to keep oxygen and carbon dioxide levels normal.
But our psychology changes how we breathe as well. The researchers divided people into low and high scorers on the Beck Depression Inventory. Now, it’s worth noting that none of these participants suffered from clinical depression, but of course some had higher scores and some had lower scores. You can see here that the peak inspiratory flow, the fastest rate at which we breathe in, was substantially higher in those with more depressive symptoms.
This is not a conscious process. This is the state of your brain controlling subtle features about how you breathe that can only be revealed with new technology.
It didn’t stop with depression. The researchers could distinguish between people with high vs low anxiety scores by looking at the variation in their inspiratory pause.
And you could determine who was more likely to have autistic features — again, none of these individuals had clinical autism — by looking at the percentage of breaths with an inspiratory pause.
This is where this stuff starts to get interesting, because it suggests that there are physiologic links between brain states and breathing patterns and that those links can be mapped with careful measurement.
I actually think there is a practical application to this. No, I don’t think we’ll all be walking around with tubes in our noses like stillsuits from Dune. But plenty of people are wearing nasal cannulas at night — for CPAP treatment. Adding technology like this to those devices could give insights into how these metrics change over time, perhaps cluing us into changes in our mood or anxiety or other health conditions before we are even consciously aware of them.
Our breathing says a lot about us. So, to paraphrase Sylvia Plath, take a deep breath and listen to the old brag of your heart. I am, I am, I am.