What does the notion of ‘person’ add to those of ‘mind’ and ‘self’?

The notion of person refers intuitively to the human being, whose intrinsic value it highlights. From a philosophical viewpoint, this notion implies that somebody remains identical to himself despite his changes and that he is self-conscious. Having these characteristics in mind, does this philosophical notion have any place in the neuroscientific approach? Is it not too immaterial to be accepted? Can it be replaced with the notion of mind as an operative power? Could there be an impersonal self?