Graph for Ultrasound Study (IMAGE) University of Minnesota Caption At Day 7 of the study, mice that were treated with the ultrasound stimulation of the spleen showed significantly less joint swelling compared to arthritic mice that were part of what are called "sham treatments" where the researchers go through all the same motions without actually administering the treatment. Credit Zachs, Lim, Binstadt, et al., University of Minnesota Usage Restrictions with proper credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.