Bingo.... It's the progression of that terrible disease of Parkinsonism and what you see is the gradual deterioration of the brainstem substantia nigra (which doesn't effect cognition) and the additive effect of dopaminergic medication (which can have psychotic effect on cognition). The masked facie and stooped posture during the weigh in are classic manifestationd of Parkinsonims. During fight, he needs to load up on meds, and though it allows more fluid movement and less tremor, side effects include some on cognition as noted above and a choreaform dysarthria (slurring and slowing of speech)... My pescription is four months off in the Phillipine, a good month off meds (drug holiday), continued excercise, and judicious use of growth hormone, testo, and powerful antioxidants.