acute brain disorder acute brain disorder /əˈkjuːt breɪn dɪsˈɔrdər/

noun

1. Any disorder (as sudden confusion or disorientation) in an otherwise normal person that is due to reversible (temporary) impairment of brain tissues (as by head injuries or drugs or infection)  ( acute brain disorder , acute organic brain syndrome )
   any disorder (as sudden confusion or disorientation) in an otherwise normal person that is due to reversible (temporary) impairment of brain tissues (as by head injuries or drugs or infection)