About all I can offer is if your father could be put into physical therapy by the treating physician, he might can get back some movement in his extremities. With improvement, could be he just might not have to one day be in a wheelchair, but no sure way to know. Physical therapy directed at this can take many months.
As for his mood, I think the docs are correct, it's hard to tell at this stage if he's just being ornery from being in the hospital for so long, or if he just has a temporary loss of emotional control that will subside in time, or if he will always be like that. Time will tell, and I do not know how much time. Could be a psychology clinic can work with him on controlling his emotions if this keeps up even after he gets home and routines start back up for him. But seeing a psychologist is a good idea no matter what, because he has got to be very frustrated at not being able to move as he used to, and a counselor can help him find healthy ways to release his frustration, like hobbies he can do sitting down at a table.
There is a very good movie, it's called "Regarding Henry," and it's about a man who loses some of his memory and movement, he goes thru rehab, and could be this will sort of help you understand what your father is going through. Also, I met a young man who sustained a head injury during a robbery, he used to speak four languages and used that ability in the military, but when I knew him, he was child-like but pleasant. He said he had to work on returning to independent living for about a year.
Hey, thanks for your detail reply. Its Oct 11 today and he is much better than the 2-3 day after stroke. He knows everything and pretty clear with speech. Memory is almost same as before stroke.
As per personality changes concerns, its getting better and better and looks like its because of being in hospital for long time and getting homesick. He talks very well on phones with friends and others.
The next is his arm and leg, he is able to move fingers on both. Hopefully he will be able to walk soon. Currently having hard time balancing himself.
I'll keep updating this thread with his progress.
Well, then, that's great! The docs really ought to try putting him in a physical therapy program if his arm and leg do not improve like the rest of him, they can make people better from all sorts of body wreckages.