I am of the view that i require some form of psychological assistance with respect to an issue that i have not dealt with from years ago, however i am not sure whether i should consult a psychologist or a physiatrist ?

Taking on the Past: It sounds like you may be wanting to deal with a past situation (vice specific symptoms or conditions). If that is the case, consider evaluation by a psychologist, a clinical social worker or other credentialled therapist. Any one of those professionals would likely know if a psychiatric referral were needed. It takes courage to take on past pain. Take care.