In which decade did Dr. Janet Travell begin injecting procaine for myofascial pain?

Dr. Janet Travell, a notable figure in the field of myofascial pain and trigger point therapy, began her work with procaine injections in the 1940s. This decade marked a significant period in her exploration and treatment methodologies for persistent myofascial pain, as she sought to provide relief through the use of injections targeting trigger points. Travell's innovative approach during this time laid the groundwork for the development of dry needling techniques that are widely practiced today. Her contributions in this era were pivotal in validating the use of injection therapies for pain management, and her collaboration with other medical professionals helped further the understanding of myofascial pain syndromes. The advancements in pain treatment initiated by her work have continued to influence physical therapy and pain management practices.