`Also, can you simulate a brain without a body or is say hormones/blood sugar/nervous system not easily separable?` From my basic understanding of the nervous

`Also, can you simulate a brain without a body or is say hormones/blood sugar/nervous system not easily separable?` From my basic understanding of the nervous system, to simulate anything approximating normal function, it would be necessary to emulate the body to some degree. There's just too much interdependence with chemical reactions taking place outside the brain for a model to be of much use in isolation.