Hi Doctor, I Had A Fall And Got My Head

Hi Doctor,

I had a fall and got my head injured. I consulted to a neurologist and he said that I've got Diffuse Axonal Injury and my brain neurons are not functioning well that's why I'm not able to concentrate.
I've lost memories of past one year too. Although a lot of things are in reflexes but not able to remember 70% of my past one year but rest of my memories are in good shape.
I've done MRI scan and reports shows everything normal, i.e. no physical injury which has been confirmed by the lab report and neurologist doctor too.
I'm undergoing the doctor's prescription too.
Please suggest if there is anything like exercise/perhej/etc to be taken care of which will help in fast recovery.