We assume from your email your disorder is an anxiety disorder as our reply is based upon the symptoms you mention in an anxiety disorder context. We have found over the years many people with panic disorder do dissociate and the itching underneath the skin can be part of it. Some people comment it can also feel like 'ants' crawling. Re the 'moving brain'. We are not sure what you mean by this.
Some people report a tingling or the 'ant' crawling sensations across the scalp.
Some people report a vibration sensation, or they feel as if the top of their scalp is being cut off, others report a great pressure from within the head pressing against the scalp. None of these symptoms are in the literature but they not uncommon. There can also be the dissociative sensation of stationary objects moving, buildings swaying, the road undulating etc. The way we think does create many of our symptoms. They can assist us to begin to work at changing our negative thinking patterns.