My feeling on your question:
It's all one thing. DP/DR is a subset of panic disorder. It's a real physiological response of our bodies to signals. We are misinterpreting those signals; that is, our bodies are misinterpreting those signals, whatever the initial cause. DP/DR is our protection against feeling the fear.
It's our bodies' "early-warning systems" that are out of whack. Determining whether it's biological or psychological or both for us individually seems to be the task at hand.
It's all one thing. DP/DR is a subset of panic disorder. It's a real physiological response of our bodies to signals. We are misinterpreting those signals; that is, our bodies are misinterpreting those signals, whatever the initial cause. DP/DR is our protection against feeling the fear.
It's our bodies' "early-warning systems" that are out of whack. Determining whether it's biological or psychological or both for us individually seems to be the task at hand.