Adding context to your question really helps. I can understand how the manipulating of your head can cause problems. I just don't think it caused any deformation. As MrsD said, there are a plethora of nerves and blood vessels that can respond to finger pressure. There are also muscles attached to the skull that move the jaw and neck. These can spasm when traumatized.

Was the physiatrist an MD or maybe an OD (osteopath)?