Effects of Lidocaine Patches on Brain Activity in Chronic Pain
Author Information
Author(s): Marwan N Baliki, Paul Y Geha, Rami Jabakhanji, Norm Harden, Thomas J Schnitzer, A Vania Apkarian
Primary Institution: Northwestern University, Feinberg School of Medicine
Hypothesis
Brain activity should be distinct between chronic back pain and knee osteoarthritis, and lidocaine therapy should be more effective on spontaneous pain in chronic back pain patients.
Conclusion
Lidocaine patch treatment significantly decreased brain activity and pain in chronic back pain patients, while knee osteoarthritis patients showed no significant improvement.
Supporting Evidence
- CBP patients showed a significant decrease in pain intensity after treatment.
- OA patients did not show significant improvement in pain after treatment.
- Distinct brain regions were activated in response to pain in CBP and OA.
Takeaway
This study looked at how a pain treatment affects the brain in people with back pain and knee pain. It found that the treatment helped back pain patients feel better, but not knee pain patients.
Methodology
The study used fMRI to compare brain activity before and after treatment with lidocaine patches in patients with chronic back pain and knee osteoarthritis.
Potential Biases
Potential biases due to the open-label design and small number of participants.
Limitations
The study had a small sample size and lacked a placebo control group.
Participant Demographics
11 chronic back pain patients and 8 knee osteoarthritis patients, with varying ages and pain durations.
Statistical Information
P-Value
p<0.01 for CBP pain intensity reduction, p=0.5 for OA pain intensity.
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website