Breakthrough Ultrasound Technology Offers Noninvasive Pain Relief through Brain Modulation, reveals study

In a groundbreaking study, researchers have explored the potential of low-intensity focused ultrasound (LIFU) to noninvasively target and modulate the dorsal anterior cingulate cortex (dACC), a key brain region associated with pain and autonomic processing. The findings present a promising avenue for noninvasive therapeutic interventions in pain management.  

The study results were published in The Journal of Neuroscience.

The dACC, a critical area in the brain linked to pain and autonomic responses, has long been a target for researchers seeking innovative ways to alleviate discomfort. The study, conducted with 16 healthy volunteers (6 males and 10 females), employed LIFU to modulate the dACC while participants experienced transient heat pain stimuli.

Findings:

• The results were significant, with LIFU demonstrating a remarkable reduction in pain ratings by an average of 1.09 points compared to Sham stimulation.
• This achievement opens doors to noninvasive methods of pain relief, potentially revolutionizing how we approach discomfort and its management.
• Crucially, the study also delved into the impact of LIFU on cardiac autonomic responses during acute heat pain stimuli.
• The volunteers' electrocardiograms (ECG) revealed intriguing changes, as LIFU increased heart rate variability, as indicated by higher standard deviation of normal sinus beats (SDNN), low-frequency (LF) power, and an altered low-frequency/high-frequency (LF/HF) ratio.
• Despite the substantial effects on pain and cardiac responses, LIFU did not show significant alterations in blood pressure or electrodermal response (EDR), indicating a targeted and specific impact on pain-related brain regions.
• One particularly noteworthy finding was the 38.1% reduction in the P2 amplitude of the contact heat-evoked potential (CHEP) observed with LIFU.
• This result further supports the effectiveness of LIFU in modulating neural responses associated with pain, providing a tangible marker of the intervention's impact.