Levator scapulae: Levator scapulae connects the neck towards the shoulder blades, raises the shoulder blade, and extends/rotates the neck for upper back steadiness. The angle within your upper arm relative in your torso will encourage you to implement scapular muscles like your traps and rhomboids (Should your arm is perpendicular https://how-to-build-muscle-in-th75419.ampblogs.com/considerations-to-know-about-how-to-build-muscle-in-the-upper-back-63425554