Well, I’m no expert, and I don’t really no biology or physiology or whatever this is, but I need help pinpointing a muscle.
Imagine that someone’s arm is extended straight out, and they are pinching their right armpit with their left hand. They feel that large muscle on their shoulder (deltoid?) but then there is a little muscle under it that is sort of pinched between their shoulder and you’re upper back/right scapula. It’s a small muscle that is sort of on the side/back of the shoulder.
Can anyone tell me this muscle? I’m a little sore their today and I’m trying to learn more about it.