I agree, it is psychosomatic, although that's usually a term used by bad doctors to wave away real problems with people. I think a better way to explain it is

I agree, it is psychosomatic, although that's usually a term used by bad doctors to wave away real problems with people. I think a better way to explain it is that your body is controlled by your brain, and if you control it wrong you can cause damage. Same way if you punch or kick something wrong you can break your hand, if you spend 8+ hours a day typing with tension, poor technique, bad posture, and ignoring pain signals then you'll hurt your hands. So yes, learning to control you body and how you use it is generally a good idea. In general I think that's all Sarno's method does. It just makes you focus on how the motions should be done in a more relaxed manner, rather than tense and harmful. Combine that with the wrist exercises and you'll be even better off.