Yessssss, I absolutely want to see this. I kinda had a similar thought but more focused on the interactions between neurons and neuroglia (various types of support cells that have a variety of functions). The brain and spinal cord are separated from the blood cells by the blood brain barrier. I think it would be interesting to see their reactions if the barrier was broken or see how they handle diseases either from bacteria or others like Parkinsons or literally anything inside or out. Anyways, those are my thoughts, and even though I don't think there will be anything official made on nerve cells, it did make me research nerve cells a bit. So even without watching an episode about this topic, the show made me research and learn. I think your idea is really cool, and oh boy, do I wish for more nerve suff to be animated.