Terrapin Station wrote: ↑June 13th, 2020, 9:47 am That was apparently a similar issue. As the Wikipedia article about Lorber states, "Explanations have been proposed for the first student's situation, with reviewers noting that Lorber's scans evidenced that the subject's brain mass was not absent, but compacted into the small space available, possibly compressed to a greater density than regular brain tissue."Well, has it ever been confirmed? If not, then the compression theory is questionable.
Professor Lorber clearly speaks of brain weight which would be a plausible measure for accurately determining the amount of brain tissue. In the case of the student with an IQ of 126 he specifically mentions that the student is estimated to have an amount of brain tissue weighing 50-150 grams (~5%).
"I can't say whether the mathematics student with an IQ of 126 had a brain weighing 50 grams or 150 grams, but it is clear it is nowhere near the normal 1.5kg and much of the brain he does have is in the more primitive deep structures that are relatively spared in hydrochephalus".