What are the types of brain injuries that occur in high-impact sports?

What are the types of brain injuries that occur in high-impact sports?At the cellular level, how are neurons and glia believed to be affected by TBIs?What are the macroscopic features (neuropathology) of chronic TBI? How is the structure of the brain affected?Do you believe there should be new rules and regulations and/or development of new protective gear? Why or why not?What do you think should be done to protect professional players from TBIs? Would you recommend the same interventions for amateur players? Why or why not?How would you advise a friend about their child’s participation in junior league football?