In the mTBI injured the brain is already compromised. When alcohol is consumed it passes the blood brain barrier easily and affects a number of different nervous systems. It acts as a neuro depressant with the pain centers which can make us feel better. It slows processing ability making those of us with slow processing abilities even slower. It suppress's transmission between nerves. It is a depressant so if you suffer anxiety you don't feel as anxious.

And it is a neuro toxin so when the feel good effects wear off and they will quickly. WE are left with toxins which will make us feel worse. Long story short concussion and alcohol are not a good mix. Remember the, "This is your brain on drugs commercial." If you are concussed your brain is half fried already.