Who should ultimately be responsible for the financial burde…

Who should ultimately be responsible for the financial burden of long-term medical care related to head injuries sustained after years of playing high school, collegiate, and professional football?  Full credit will be given for a thorough and thoughtful response. 

BONUS: 4 points possible   How many types of AC sprains are…

BONUS: 4 points possible   How many types of AC sprains are there? [1]   Which ligament in the shoulder connects 2 parts (processes/protrusions) of the same bone? [2]   What type of curve is the lumbar spine? [3]   What nerve is commonly entrapped by the wrist flexors, under the UCL, causing numbness, tingling and decreased grip strength? [4]