My neck muscles wouldn't fully release until the adv PT tried the top rib mobilization/lowering technique - and that was months after the spasms were gone that I went to him.

chiro did do NIMMO {trp/deep slow pressure stretch type thing} on my scalenes & SCM * upper chest muscles -right under collarbone.

That relieved a lot of discomfort but the top rib dropping was a final big fix for me. chiro always checks it at my monthly appts now.