Ellen, you're a learned, and scholarly lady, it's obvious. But that's one of the problems, intellect vs. feeling. Jung said the two hinder each other. We use intellect (rationalizing) as a means to cope, to not have to feel, as a protective mechanism. The brain protects the heart, it does not want to hurt the means by which it lives--unless.....
I wrote in my book, in several ways, that TMS is both a message and a distraction. Every action has two simultaneous effects. It's part of that yin chases yangy thing I kept repeating: the duality of humankind. The distraction in TMS stems from the conscious side. The pain, or unpleasant symptom, arises as a distraction to divert the mind's eye away from what it doesn't like what its sees emanating from the deeper unconscious. The message is coming from the deeper self, that it fears, is not happy, not whole, and in disharmony.
TMS is both a distraction and a message. A distraction IS a message; it's telling you that you can't face something. Dr. Sarno wrote with Rashbaum that TMS is not from reduction, so in your question "direct manifestation of emotional pain" I would have to say no, based on the good doctor's statement. But that's not the point. The point is in over-thinking the solution, and forgetting to simply live. I almost over-thought myself into the grave at one point. It's common for people to try to think their way into healing, a 'misrepresenting' of what Dr. Sarno called knowledge therapy.
Remember the 2 pillars of healing. First is acquisition of knowledge. Second is acting on that knowledge. Few people get to pillar #2, they get stuck in the pain loop on pillar #1; trying to think away imbalance. So remember, the body is also involved in life, it needs to get in on the game too. We cannot live only in our heads. Our hearts want to get up to bat too.
I hope you come by on March 25 to say hi, it's fun to meet people like myself. We are one and the same. God help us both.
Steve