The moment Shen Feng peeled back the membrane to reveal the brain, he saw that Yamaki Yuichi's was already significantly different from a normal human's.
Aside from the expected folds and grooves, Yamaki Yuichi's brain now had numerous pitted and uneven areas.
Cutting it open with his blade revealed small holes.
Like a block of Swiss cheese.
The densely packed holes seemed to have appeared recently, but they were clearly growing larger.
Brain spongification.
Based on Shen Feng's current medical knowledge, this strongly resembled Kuru Disease, which is caused by a Prion Virus.
In human history, the Eastern Highlands Indigenous Tribes of Papua New Guinea had a custom of eating the organs of their deceased relatives.
This horrific custom allowed the Prion Virus to spread through the digestive tract, infecting person after person.
