Hello and Welcome to Health care Magic.
I am sorry about your Father's condition.
As far as I know,Dr. Pramod Kumar Pal is one the best Neurologist
in the country and he is a specialist in Stroke
ans associated difficulties.
He is working as the one of the Professors in Neurology at NIMHANS.I heard about him from one my colleagues.Dr Pal will be available on Mondays and Thursdays in NIMHANS Neurology OPD.
I just want to add that there is not much drugs available to treat chronic cases of stroke.Anyway lets try and pray for the best.
Hope this discussion will be helpful to you.