As the fields of cognitive science, psychology, and new biology continue to develop, the scientific community is beginning to understand more about just how powerful our beliefs are. The way we think affects our behaviors, our mood, our perceptions, and even the way we move and experience pain. Most of us have heard of the placebo effect- this is a beneficial effect that occurs after a particular stimulus that cannot be directly attributed to the stimulus, but rather to the belief that the stimulus had a positive effect. This occurs due to both expectancy and conditioning. We expect something to happen, perhaps because it has happened for us in the past, or because someone has planted the idea into our heads that something will happen. This expectation has a neurophysiological effect, which activates particular circuits in the brain that will actually contribute to the expected effect.
The specific neurophysiological mechanisms of how thoughts can impact our physiology are not fully understood, partially because our understanding of consciousness is still extremely limited. However, it is clear that our thinking can impact our body. If you have any doubt about how thoughts can impact our physiology, consider this thought experiment. Does imagining yourself biting into a lemon trigger any kind of physical reaction? Why might that be?
While the placebo effect can certainly be used for good, we must be wary of its dark cousin, the nocebo effect. The opposite of a placebo, nocebo is a stimulus that creates negative expectations that result in negative health outcomes.1 This might be done intentionally, but more often it is an unintentional adverse effect commonly experienced through interactions with healthcare providers. Ever have an experience in receiving imaging (an X-ray, MRI, etc.), and the provider makes a comment such as … “Wow, no wonder you have pain! Your spine is a mess!” Or another favorite, “Geez, your knee is bone-on-bone! I’m surprised you can still walk! Time for a knee replacement…”. After hearing this information, the nocebo effect can occur, and one may actually begin to experience more pain. It can also impact behavior- perhaps by believing that one’s knee is bone on bone and walking should be difficult, one might stop walking as much, or may begin to compensate while walking. This can lead to actual tissue changes such as deconditioning, excessive tension in various muscles, and more. The negative belief that resulted from imaging and the subsequent conversation with the doctor ended up resulting in a greater experience of pain as well as impaired function.
How can we use the power of belief to support our health and function? For starters, question negative beliefs, whether these are personal beliefs or from someone else. Anyone who receives imaging should be well informed that structural abnormalities found on imaging do not correlate with pain or function. While people with low back pain may have some abnormal findings on their MRIs, so do asymptomatic people.2 If 100 random people were taken off the streets and underwent imaging, there would be plenty of people with abnormal results with no pain, as well as people with crystal clear imaging who are in severe pain. If people attach too much value to their imaging results, they give up on their belief in themselves to get better. “I have stenosis and arthritis in the spine… physical therapy certainly can’t fix that!” Someone who maintains this belief is deciding that their situation is not in their control, and they are less likely to believe that they will get better. They will be less likely to participate in therapy, more likely to experience pain and dysfunction, and may seek more aggressive treatment options.
In addition to questioning negative beliefs, create your own positive beliefs! Evidence shows that the use of positive affirmations can lead to improved performance, well-being, and more.3 The use of positive affirmations is a prime example of using the placebo effect to trigger positive health outcomes. By changing our beliefs about ourselves, we can change our behavior and function. This can be very helpful for those of us experiencing pain. A simple exercise could be creating several positive affirmations to repeat to yourself morning, afternoon, and night. The affirmations could be phrases that you don’t currently believe, but what you wish your life was more like. For example, consider the following positive affirmation: “I am strong. I am resilient. I am at peace with my body.” For someone experiencing chronic pain, it can be very difficult to experience peace with one’s body. However, having a sense of peace with oneself can have extremely beneficial effects, including downregulating tension in the body and decreasing the affective components of pain. As we continue to repeat these positive affirmations, they will gradually shift our mindset, beliefs, and experience of life. Ever try to force a smile while upset? Similar to the use of positive affirmations, simply smiling will bring about positive changes in mood, as our brain associates the mechanical act of smiling with happiness.
Written by Jacob Tyson, DPT - Physical Therapist, Yoga Instructor and The Wellness Station Team