My mare does this little trick where I have her bending her whole body the way I want, for example to the inside, and she can turn her head only from the poll so that she is still looking to the outside, with her nose to the inside, if there's something interesting. I don't know what it would technically be called, but my last trainer called it 'bending at the poll' and that seems pretty correct.
I use a lot of inside rein and a LOT of inside leg and try to really push her into the bend, but her body's not the problem. Neck, nose, and body are all bent where I want, but she still manages to tilt her head to look to the outside.. I'm not sure how to explain it correctly xD