AM Mick Bates was in control of some of his actions after falling down a flight of stairs at a Cardiff restaurant, an expert neurologist has admitted.
Consultant neurologist Dr Gardner-Thorpe told Cardiff Magistrates' Court that evidence given during Bates' trial "strongly suggested he was at least partially in control of his faculties".
Prosecuting, Jessica Element asked Dr Gardner-Thorpe, a consultant neurologist for more than 36 years, if one can be mildly concussed yet still aware of some of the things going on, and he replied "yes".
She then repeated evidence that had been put before the court during the trial and asked if the evidence "strongly suggests that Bates was at least partially in control of his faculties", during the early hours of January 20.
Again he replied "yes".
Dr Gardner-Thorpe also confirmed that many of Bates' alleged actions - such as hitting a paramedic and swearing at a nurse - were "goal directed and purposeful".
The doctor also agreed with Miss Element that Bates' alleged behaviour could be as a result of being intoxicated through alcohol.
Dr Gardner-Thorpe did however reiterate that, in his professional view, one cannot exclude the fact that Bates was unaware and the possibility that his mind was not "working the actions he performed".
The Montgomeryshire AM denies three counts of common assault by beating and three public order offences.
All witnesses have now been called and the trial will continue this afternoon with closing summaries from the prosecution and defence.