> For the complete documentation index, see [llms.txt](https://docs.wormbrain.info/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wormbrain.info/explore-wormbrain/04-lab/the-model.md).
# the model
The published connectome is a phone book. WormBrain turns that phone book into a living network: each named cell, the chemical contacts, the gap junctions, then a clock that steps them forward.
## What it builds
From the pinned hermaphrodite table we generate a network file the simulator can run. You can ask it for two cells, the pharynx, or the whole animal.
## Levels of detail
The same wiring can be run sloppy or fussy. We keep four parameter sets on the shelf.
| Set | What the cells are | What it is good for |
| --- | ------------------------------------------------------ | ----------------------------------------------- |
| A | Simple integrate-and-fire points with current inputs | Fast sanity checks |
| B | Still simple cells, often on the pharynx | Watching a small circuit without the whole body |
| C | Full network at the scale we use for the live observer | The persistent worm on FOMO |
| D | Multicompartment cells, run in NEURON | When we want the 3D body, not just the graph |
Live WormBrain sits on **set C**. Set D is how we inspect the animal as a 3D network when we need to see muscle and nerve together.
## How a step happens
1. Read the pinned connectivity tables.
2. Build a NeuroML network (who exists, who talks, how hard).
3. Write a LEMS file that says how long to run and what to record.
4. Step it in jNeuroML / pyNeuroML, or hand set D to NEURON.
5. The observer writes market currents onto sensory cells and reads AVA / AVB.
## Twiddling a cell
Training does not redraw edges. It changes how loudly a cell listens. The generator already lets us override a single parameter and watch the voltage move.
A current can also be a shape, not a flat shove. A sine written onto a named cell is how we test whether the body still answers.
## 
## What the live worm uses
| Piece | Live setting |
| ------------- | ------------------------------------------------ |
| Wiring | Pinned hermaphrodite table (Cook 2019 line) |
| Parameter set | C |
| Clock | One persistent state, not a fresh worm per token |
| Inputs | Capped sensory currents from the book |
| Outputs | Command-cell voltages into the decoder |
The pretty 3D pictures above are inspections. The FOMO wallet only sees what set C plus the cage let out. See [What's running](/explore-wormbrain/04-lab/whats-running.md) for the rest of the stack.
---
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