There have also been experiments run on split brain patients that suggest our idea of self is a reactionary rationalisation based on what the rest of our brain is doing.

For example - asking, whispered into one ear, a person to get a drink from a vending machine because I, the experimenter, wanted to take it home with me to drink later. Then when the subject returns, asking, whispered into the other ear, why they got the drink, to which they reply "because I was thirsty"