The American Academy of Physical Medicine and Rehabilitation. This website can help answer your questions about Physiatry and help you find a local Physiatrist.
The Association of Academic Physiatrists. This website also has detailed information regarding the field of Physiatry.
The American Association of Neuromuscular and Electrodiagnostic Medicine. This website can answer your questions regarding nerve conduction testing and electromyography (EMG), along with containing information on common muscle and nerve disorders.
This website contains a plethora of information regarding spine disorders; including: anatomy with pictures, specific conditions, available treatments, exercise information, information on medications, and information on injections (interventional procedures).