WTF???
You need to read the reports. His brain is entirely beyond recovery. His brain tissue has been replaced in equal measure with a combination of water and cerebrospinal fluid..The thalami, which fire the pathways within the white matter, which generate sensory perception, is effectively invisible in the scan.
In simple terms the majority of the white matter of the brain and a significant degree of the cortex have been wiped out by this remorseless degenerative condition.