It is interesting to speculate how the world got along without back surgery for so long. I suspect that even though the family physicians of seventy-five years ago were unaware of the existence of TMS [same as MPS — Paul], they tended not to take back pain or ‘sciatica’ very seriously. Mustard plasters were widely used and probably brought about relaxation of muscle spasm through the heat generated by the plaster. Sometimes folk medicine is more sensible than ‘modern’ medicine. In any case, I suspect that the low-key, nonthreatening approach to back problems characterized by an earlier time helped to prevent the kind of long-term, disastrous courses that exist today.
Critical Analysis Review of Dr. John Sarno’s Books & Ideas — Sarno’s methods are historically important, based on a kernel of an important truth that has been blown waaaay out of proportion
One article on PainScience.com cites this item as a source: