can we then compare this with modern pyschology and science (and the understanding of clinical death and brain death).
The first step is making clear what "this" means.
Most of us here (including me) have a lot more to learn about what Epicurus and Lucretius really taught. And the bottom line is that they taught that the soul is material and is in no way supernatural and does not survive death. I am not aware that any new details of mechanics offered by "modern psychology and science" really have much to say on those ultimate conclusions.
If one does not realize that a heap of sand is made of individual grains of sand, and nothing more, and if one does not take a position that the bodies our senses reveal to us are true and real, then no amount of detail about the operation of cells and synapses is going to move you closer to taking a position on whether there is an "immortal soul" somewhere in those cells and synapses. As far as I can tell modern science and psychology most of the time refuse to answer such ultimate questions, and they defer it to "philosophy" or 'religion" as if the question has no answer. Epicurus says that these questions DO have answers we can consider to be true.
the must more productive use of AI diagramming would be to help explain what Epicurus and Lucretius are actually saying. Only once that is clear does any amount of cellular biology or clinical psychology have any relevance.
And all that is because if you do indeed have an immortal soul designed by God and destined to either heaven or hell, then you darn well better put aside any other questions so you can "get right with god" as you could be called to meet your maker at any time!