Depersonalisation is a term frequently used in anxiety circles. It is a distancing from one’s own self and a feeling of dreamlike unreality. Part of this is the physiological symptom of shallow and tired breathing and the rest is in the mind or spirit. Paul David on his site www.nomorepanic.co.uk has a page dedicated to this subject. It is an interesting read whether I agree with it or not. I will have to get around to buying his book one day, just to have a nosey.