I need to see loads of examples before I can get something. So here's loads of necks doing the weird necky things that necks do.
To get what's going on with the tangle of muscles and tendons catch necks in action. Watch people in cafes. Pause TV. (Buffy the Vampire Slayer has particularly good lighting for drawing.) Then check out how cartoonists simplify the confusion. Maybe even check out some anatomy to see what's going on beneath the skin. Each gives you a different piece of the puzzle.
Organized by where the head is relative to the shoulders, then by where the camera is. So each group should have the same muscles and tendons bulging ou