It’s no secret that I’m a bit of a research geek. Scientists everywhere are exploring the experience of pain and how we can alleviate it. So I thought I’d share some of the most recent findings about pain.
Some of these you might be able to apply in your daily life. Some you might like to share with your healthcare providers. And some are just interesting to know!
Men and women remember pain differently
Scientists have theorised for years that chronic pain is related to memories of earlier pain. One team has found that men remembered a previous painful experience quite clearly. This made them hypersensitive when they were returned to the location of that experience. On the other hand, women were less stressed about their experience.
The same researchers did the same experiment on mice, and ‘blocked’ the memories of male mice. When they ran the experiment with the blocked mice, they did not show signs of being stressed by the previous pain.
The brain cells that make pain unpleasant
If you step on a sharp object, your nerve cells in the brain tell you two things – there’s a piercing sensation in your foot, and that it’s not a nice feeling. But a team of scientists have discovered the brain cells that tell you all about that not-so-nice feeling – these brain cells are responsible for the negative emotions of pain.
In an experiment with mice, they were able to identify a group of neurons in the basolateral area of the amygdala (often called the fear centre of the brain). When the mice experienced pain, these neurons would fire.
But when this bundle of neurons was turned off, the mice didn’t experience the discomfort of pain. They were still able to feel and respond to sensations, but pain was no longer unpleasant for them.
Pain as a self-fulfilling prophecy
Have you ever flinched at something that you expect to hurt? The latest research suggests that you probably will feel pain, even if it doesn’t cause pain. Say what?
If you expect pain, your brain will respond to that pain. Researchers scanned the brain of people who were exposed to low heat and high, painful heat. The participants were shown cues to suggest whether the heat was going to be low or high. When the heat was applied, they rated their pain.
But what they didn’t realise was that the cues didn’t always correlate to the heat they received. When they expected high heat, brain regions around threat and fear were activated while they waited. When the heat was applied, there was more activity in the pain regions of the brain – even if it was a low heat.
This may be part of why chronic pain lasts long after the damage to tissue has healed.
Genes associated with chronic back pain discovered
Chronic back pain is actually the number one cause of years lived with disability world-wide. So scientists are looking at all of the factors that might contribute to it. Recently, researchers have uncovered three gene variations that are associated with chronic back pain.
The study looked at the genes of 158,000 people, including 29,000 that had chronic back pain. Then they looked for the genes that popped up for those with chronic back pain.
One gene variant, SOX5, is involved with development of the body in the womb. If it’s turned off, it causes defects in cartilage and bone formation. A second gene that was already associated with disc herniation was linked to chronic back pain. The third was a gene that plays a role in the development of the spinal cord.
This might not cure your chronic back pain, but it does help researchers to pinpoint the structures and processes involved. In the meantime, make sure you get yourself booked for a myotherapy session!
There were so many interesting research papers that I have pt 2 coming up next week! If you don’t want to miss out, make sure you’re following my Facebook page. There, I share tips, info and insights into chronic pain management and myotherapy.
Mel is a Myotherapist based in Ferntree Gully.