Hi! I live in Norway and have now finally been diagnosed with TOS by an excersise correctional specialist named Kjetil Larsen here in Norway ** I also have depressed shoulders and have been advised by him to raise my shoulders by about 1-2 cm, because veins/nerves are being crushed between collarbone and first rib. I’m having to learn new posture with shoulders and how to correctly use shoulder blades etc. I notice a big difference in ulnaris pain when I hold my shoulders up, it’s a big relief. Kjetil recommends no stretching of neck muscles, because these muscles are often very weak on TOS patients.
I recommend checking out his website or looking him up on YouTube. He has also published an article about how to correctly identify and treat TOS.