Neat research on brain-body connection and acute inflammation
Voluntary attention regulates acute immune responses in humans | Nature Human Behaviour
Two groups of people had standardized histamine skin prick tests:
Group 1: Instructed to direct attention toward bodily sensations
Group 2: Instructed to watch a video
Group 1 perceived itching/burning sensations to be more noticeable, but interestingly, they had more regulated inflammatory responses, and returned to baseline more quickly. So they were simultaneously more aware of symptoms and had a milder immune response and quicker return to homeostasis.
Group 2 perceived milder symptoms, but had greater inflammatory responses.
Sympathetic activity was no different between groups, but Group 1 had increased HRV (proxy for parasympathetic activity)
Interestingly, applying topical lidocaine and repeating the experiment produced the same results -- people who were distracted still had greater inflammatory responses, and people who focused attention internally had milder inflammatory responses, even though they were less aware of the itching/burning.
This was FASCINATING to me!! It sounds so much like somatic tracking.
However, we can't say that:
x This applies to chronic inflammation
x This proves somatic tracking works
x Ruminating on symptoms is beneficial. We don't know the participants' mental states or attitudes toward symptoms.
x We know the exact neural pathways involved in this process
So there are major limitations on applying it to what we do here, BUT I think it's a really cool vote of confidence that what we choose to do with our attention and thoughts can have a measurable impact on the immune system.