Are there any muscles other than the trapezius that effect both the shoulder and the neck?

Any muscles that attach to both A and B

A including

humerus or scapula or any body part distal to the humerus

B

The spine, jaw or skull

C

I did not list the clavicle in either A or B on purpose because I am trying to figure out which shoulder muscles I have to worry about head position when stretching and it would make the question to confounding and confusing for my goals