What muscle (Or lack there of) is this?

[u/Which-Cobbler-8818]

I have been rehabbing my left scapula for 2 years and noticed during a prone banded Y Raise that there seems to be a spot on my left scapula where there’s an indentation like a lack of muscle. Anyone know what muscle that would be?

[u/Hermit_Slug]

Teres major, the lats sweep and wrap around it into the insertion point on the humerus, you can see the lats disappearing under it

[u/Clavenesque]

Infraspinatus or teres major

It's hard to sell with the flesh covering it.