I have experience with such a psychosomatic neuromuscular condition from which I suffered for 5 years and was so physically debilitating that I finally resorted to brain surgery only to discover after the successful surgery did not alleviate my condition that my sub/unconscious or my soul, depending on one's beliefs, caused my condition as a signal. https://medium.com/know-thyself-heal-thyself/my-personal-experience-with-idiopathic-truncal-dystonia-dd10f0a13a25