All in Mind

I always wonder..that everything is in brain..uh? Yes..if u want something , perform an action, to react, to think..then only brain plays the role. It has all kinds of sensors in it..which carries messages and makes the other parts of the body react. Infact to lift a hand also ..the message has to transfer to brain and only then you will be able to lift it.
Is that all in mind??? a little size as good as one's wrist...strange!
So..if mind is everything, then other parts are just a decoration to the body???huh?..may be an alien will have only mind and no parts...jokes apart...i always wonder!!!!
What if the brain goes blank....stops thinking..stops reacting...either the person will be in coma or dead.
Now..brain decides what you want to see, hear, perform an action, smell, sense and feel an object.
If the mind, cells, brain etc is common to all, no one has unique cells irrespective of a politician, student, a saint etc ( am talking about human beings as of now). The why that brain functions different with everyone...
People keep telling..that one is not using the brain..the left side or the right side...but what and who prompts them use their left, right or center of the brain??? It is the brain indeed!!
Think.......