can a person in Deep Coma really can think about his or her surrounded?

I have never been comatose or been around anyone who was,however I am led to believe that a person who doesn't seem cognizant can somehow relate to their surroundings. They might have the sense of their conscience being able to lead them to feel who is around them and even a sense of smell. Of course this is all just my own speculation but I think a lot of people who have family in this type of condition want to think on the positive side and hold out hope that their loved one might realize they are there with them.

No dear its really not possible for a person to listen or feel anything when he is in deep comma.From my personal experience i can say that its like a long deep sleep for you.Its impossible to remember any thing during this period.Because in this period brain generally stop its main functions.

When I was nursing we always talked to the people in comas about what was going on inside the ward and everyday life. Sometimes there families bought in music that the patient liked and we did sometimes get a response which at times seemed unbelievable. Some of the people who had been in a coma said later that they could hear some of the things that were going on around them but they just could not fight their way back until they heard something special to them. So it is always worth trying to get through to someone in a deep coma. never give up.

I think he or she can really think
but may be they think that it's just a dream

There have been studies that prove that some coma patients feel pain. If brain waves prove that they can feel pain, I feel they can hear and/or see. I guess it would be on an individual basis but I feel some patients definately know when a loved one is standing there talking to them. It's been proved many times because on several different occasions, the patient has squeezed the person's hand or gave some type of eye movement.

So, yes! I do believe in individual cases that this can happen.