Hi - can you try a simple test for me?

1. Lie on your back with your head comfortably supported.
2. Use your right hand and feel the neck bones from the LEFT side of your neck (you will reach across with your RIGHT hand to do this...) - make sure the pads of your fingers can all touch a bony part of your neck (the lateral mass for the PTs out there...)
3. Lift up your LEFT arm straight up to the ceiling.
4. Now take the LEFT arm out to the side until is is level with your body
5. During this motion (in step 4), feel using your RIGHT hand/fingers whether your neck bones go towards the left (and into the fingers) or stay still.

If the neck bones 'drag' across to the left, you will almost definitely have a stability issue - see a physical therapist who has "Motor Control" experience in treating the neck...

The authors you might want to look up on "Pubmed" are Gwendolen Jull from the University of Queensland. She runs a whiplash research centre there and does a lot of research in this area. You should be able to get 'abstracts' from Pubmed which you can then go to the university library which has a medical section and look up the full text articles - if you can't, find a university student who has internet access!!

Good luck!