The spectrum includes acute concussion, second impact syndrome or acute cerebral swelling, postconcussion syndrome, depression or anxiety, chronic traumatic encephalopathy (CTE) and possibly other ...

Now he probably suffers from chronic traumatic encephalopathy, or CTE. The neurodegenerative condition is linked to repeated blows to the head. His brain is damaged beyond repair.

More information: Raymond Nicks et al, Neurodegeneration in the cortical sulcus is a feature of chronic traumatic encephalopathy and associated with repetitive head impacts, Acta Neuropathologica ...