A recent scientific study shows that chronic back pain may affect how the brain processes sounds, making some everyday noises seem more annoying or even painful to people with this condition.
This study was conducted by researchers from the University of Colorado and the University Medical Center Hamburg-Eppendorf, and included 142 people with chronic back pain as well as 51 people without chronic pain, whose ages ranged from 21 to 70 years.
Back pain and annoying noises:
In the course of the experiment, participants underwent functional magnetic resonance imaging (MRI) scans while exposed to two types of stimuli: an unpleasant sound similar to a knife rubbing against a glass surface, and mechanical pressure on a thumbnail.
After each trial, they were asked to indicate the level of discomfort they felt.
The results revealed that individuals with chronic back pain rated sound and pressure as more annoying compared to the control group.
But the difference was more pronounced when exposed to sound, indicating that chronic pain may increase the brain’s sensitivity to non-painful sensory stimuli.
Brain scans showed higher activity in the primary auditory cortex of people with chronic pain, the area responsible for processing sounds.
Increased activity was also observed in the “insula” area, which is a part of the brain that links physical sensation with feelings, which may explain why patients feel that annoying sounds are more painful or stressful.
In contrast, brain regions associated with emotion regulation showed less activity, which may limit the brain’s ability to buffer unpleasant stimuli.
The researchers also discovered similarities between these brain patterns and those that appear in patients with “fibromyalgia,” a chronic pain condition characterized by extreme sensitivity to various stimuli.
The results of this study suggest that chronic pain may be related to changes in how the brain processes sensory signals, and not just a physical back problem.
Experiments also showed that some psychological treatments that retrain the brain to interpret pain signals can reduce sensitivity to annoying sounds, opening new horizons for treating millions of patients around the world.
