This study looks at fMRI in 5 subjects during heat pain, and then with Optimal electroacupuncture and Minimal electroacupuncture. Both types of acupuncture suppressed the brain activation from heat pain, but the optimal electroacupuncture more so. They used 5Hz electroacupuncture which is a somewhat unconventional choice, since most studies look at either 2Hz or 100Hz.
This type of suppression could be of great clinical value in cases of chronic pain, since one school of thought is that the brain recruits more and more “real estate” the longer it goes on. So if you can suppress those inputs, perhaps the vexing chronic pain pattern may diminish. Full article at the link. (For more information about my practice, please click here.)