Visceral therapy is increasingly used by manual therapists, and research continues to emerge that attempts to explain the underlying mechanisms of the techniques. A study published in the Journal of Bodywork & Movement Therapies in 2012 reports on the effects of visceral therapy on pressure pain thresholds. Osteopathic visceral mobilization was applied to the sigmoid colon in 15 asymptomatic subjects. Pressure pain thresholds were measured at the L1 paraspinal muscles and 1st dorsal interossei before and after intervention. Pressure pain thresholds at the level assessed improved significantly immediately following the visceral mobilization. The effect was not found to be systemic. Hypoalgesia, therefore, may be a mechanism by which visceral mobilization affects patients who are treated with this technique.
Another research study that aimed to assess the effects of visceral manipulation (VM) on low back pain found that the addition of VM to a standard physical therapy treatment approach did not provide short term benefits. However, when the 64 patients were reassessed at 2, 6, and 52 weeks following treatment, the patients in the group with visceral manipulation were found to have less pain at 52 weeks. The patients were randomized into 2 equal groups and were provided physical therapy plus a placebo visceral treatment or a visceral treatment in addition to physical therapy. The authors propose that there may be long-term benefits of including visceral therapy in rehabilitation approaches.
If you would like to learn more about visceral techniques as well as theory and clinical application, check out the schedules for Ramona Horton's Visceral Mobilization 1 (VM1): The Urologic System, and Visceral Mobilization 2 (VM2): The Reproductive System. The first opportunity to take VM1 is in November in Salt Lake City and VM2 is scheduled in September in Ohio.