What if your dominant personality ate all it's siblings and that's why you only hear one voice?

Anyway, there are multiple centers in your brain that process different sensations and conditions - you perceive hunger, thirst, anger, temperature etc.

Think about a "computer" like a desktop or laptop. How many computers are in the computer? There are many chips that run programs, but are not considered "the CPU".

What if your hunger perceiver was conscious, but your .... main consciousness didn't let it talk.

It could be an interesting science fiction story at least.