interesting.  

wonder how many "pure" blast injuries there are, versus blast injuries that are accompanied by impact injury as troops are thrown about by whatever it was that caused the blast.  

if microcavitation causes the damage in pure blast injury, would that injury be present throughout more of the brain,since the blast wave would involve the whole head?  How would that affect the symptoms experienced and the findings at neurological examination? and how would reflections of the blast wave by helmets and surrounding physical structures affect this process?

i wonder that microcavitation would affect the brain cells directly and cause dysfunction:  that may be a more proximate injury than any leakage from injured blood vessels and associated blood brain barrier.