The Collarbone and the Shoulder Blade

The main thing is that you need to know what a collarbone is and what a shoulder blade is. My brother felt a shelf where the shoulder blades stopped, and then there was a two inch gap, and then the arm. So because the arm had come out of his socket, there was like a gap. I don't think he meant a gap at the shoulder blade on his back. I think he means a gap between the collarbone and the arm. There's no gap there, right? There shouldn't be a gap. If there's a gap, if you're feeling your arm now and there’s a gap there, then there's a problem. It might mean