Part of a statement released by his family.
According to wiki:
Diffuse axonal injury (DAI) is one of the most common and devastating types of
traumatic brain injury,
[1] meaning that damage occurs over a more widespread area than in
focal brain injury. DAI, which refers to extensive lesions in
white matter tracts, is one of the major causes of unconsciousness and
persistent vegetative state after head trauma.
[2] It occurs in about half of all cases of severe
head trauma.
The outcome is frequently
coma, with over 90% of patients with severe DAI never regaining consciousness.
[2] Those who do wake up often remain significantly impaired.
[3]
Could be like Schumacher