An Introduction to Mind-Body Bridging & the I-System

As mindfulness has become deeply entrenched in today’s most utilized and accepted psychotherapy modalities, there have been various incarnations of mindfulness-based approaches to healing and wellness. Of course not all mindfulness-based therapies are created equal; some are backed by research and others aren’t. One approach of the former group, Mind-Body Bridging (MBB) was developed and meticulously researched for nearly 20 years by physicians, psychologists, researchers, and mental health and substance abuse professionals. MBB developer Stanley Block, MD, is the author of several workbooks using the modality which have been adopted all over the world for use in the treatment of mental health issues including post-traumatic stress, anxiety, anger, addiction, and stress. The MBB program has been so effective among populations who’ve used it that Block’s research team at the University of Utah Medical School received a $600,000 grant from the Department of Defense to investigate the clinical benefits of MBB for Gulf War veterans. It has shown incredibly promising results with veteran populations for the treatment of common PTSD symptoms including insomnia, fatigue, and hypertension.

So what exactly is Mind-Body Bridging?

According to Block, the holistic system that regulates mind-body states is called the I-System. The I-System is either active or at rest. When you are upset, for example, the I-System is on. The I-System is called such because when it’s on, we are falsely identifying with the contents of our spinning thoughts and physical sensations caused by the I-System. When this system is activated, your body’s natural way of working is disrupted, so it’s crucial to notice and maintain awareness of how it functions. Once it is active, says Block, you live your daily life as if you were seeing the world through the system’s distorted prism.

Mind-Body Bridging is an attempt at putting the I-System to rest. When your I-System is calm, you’ll be much more effective at dealing with your anger (Tollefson et al. 2009). Mind-Body Bridging is based on the premise that we are always connected to a wellspring of healing, goodness, and wisdom. The reason for our harmful actions is that when the I-System is active, it keeps us from reaching into and expressing this personal wellspring.

Brain research (Weissman et al. 2006) has found two networks of functioning with different features: an executive network and a default-mode network. The executive network coordinates moment by moment how we see the world, think, make decisions, and act. It’s responsible for the direction and management of our lives. The default-mode network is at work when we’re having exaggerated thoughts about ourselves and our experiences, making it difficult to respond appropriately to situations as they come up. Researchers have found that when the default-mode network is active, the executive network is inactive (Boly, Phillips, Balteau, et al. 2008). Only one network can be in the driver’s seat at a time. Using fMRI, scientists and doctors can now take pictures of how the brain changes while it’s busy. Research suggests that the I-System referes to the default-mode network and that mind-body bridging refers to the executive network (Block, Ho, and Nakamura 2009). When the default-mode network is not active, your executive network takes charge (Boly, Phillips, Tshibanda, et al. 2008), regulating your mind so that you function at your best. The I-System is why you can’t seem to manage your anger; it makes you explode in angry outbursts (Lee, Uken, and Sebold 2004). MBB quiets the I-System, letting you manage your anger and naturally function in executive mode. Block suggests that you can imagine a big switch in the brain that turns the I-System (default-mode network) on and off. When the I-System is on, it shuts down your executive functioning. When the switch is off, you function naturally, manage your anger, and live life at its best.

The mind and body do not function independently; they work as a single unit that you can’t separate. Block suggests that relating to the mind-body states in terms of an active or inactive I-System gives you the power to quickly start reducing your anger outbursts and harmful actions, even during times when life is overwhelming.

Tollefson, D. R., K. Webb, D. Shumway, S. H. Block, and Y. Nakamura. 2009. “A Mind-Body Approach to Domestic Violence Perpetrator Treatment: Program Overview and Preliminary Outcomes.” Journal of Aggression, Maltreatment, and Trauma 18 (1):17–45.
Weissman, D. H., K. C. Roberts, K. M. Visscher, and M. G. Woldorff. 2006. “The Neural Bases of Momentary Lapses in Attention.” Nature Neuroscience 9 (7): 971–78.
Boly, M., C. Phillips, E. Balteau, C. Schnakers, C. Degueldre, G. Moonen, A. Luxen, P. Peigneux, M. E. Faymonville, P. Maquet, and S. Laureys. 2008. “Consciousness and Cerebral Baseline Activity Fluctuations.” Human Brain Mapping 29 (7): 868–74.
Boly, M., C. Phillips, L. Tshibanda, A. Vanhaudenhuyse, M. Schabus, T. T. Dang-Vu, G. Moonen, R. Hustinx, P. Maquet, and S. Laureys. 2008. “Intrinsic Brain Activity in Altered States of Consciousness: How Conscious Is the Default Mode of Brain Function?” Annals of the New York Academy of Sciences 1129: 119–29.
Block, S. H., S. H. Ho, and Y. Nakamura. 2009. “A Brain Basis for Transforming Consciousness with Mind-Body Bridging.” Abstract 93. Paper presented at Toward a Science of Consciousness Conference, June 12, at Hong Kong Polytechnical University, Hong Kong.
Lee, M. Y., A. Uken, and J. Sebold. 2004. “Accountability for Change: Solution-Focused Treatment with Domestic Violence Offenders.” Families in Society 85 (4): 463–76.

Stanley H. Block, MD, is adjunct professor of psychiatry at the University of Utah School of Medicine, and a board-certified psychiatrist and psychoanalyst. He is a consultant on the medical staff at US Army and Veterans Administration Hospitals. He lectures and consults with treatment centers worldwide, and is coauthor of Mind-Body Workbook for StressMind-Body Workbook for PTSDMind-Body Workbook for Anger, and Come to Your Senses. He and his wife, Carolyn Bryant Block, live in Copalis Beach, WA. Find out more about his work online at

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