TWIL #009 - Can our Consciousness be put into a computer?
Researchers mapped every neuron and synapse of a fruit fly's brain and ran it in a computer. With zero training, it started walking, eating, and grooming.
- #neuroscience
- #ai
- #connectomics
A fruit fly brain has 125,000 neurons and roughly 50 million synaptic connections. Researchers spent years mapping every single one of them - a field called connectomics - and then implemented the resulting wiring diagram computationally.
The result: a digital brain that, with no training and no programmed instructions, began exhibiting the fly's natural behaviours. It walked. It ate. It groomed itself. At 95% accuracy compared to the real fly.
This is significant for a few reasons:
It challenges how we think about "learning." The behaviour emerged entirely from structure - the architecture of connections, not learned weights or reward signals. The map was the program.
It validates the connectome approach. The hypothesis that behaviour could be reconstructed from pure structural data has been debated for decades. This is strong evidence it works, at least for small nervous systems.
It raises uncomfortable questions about consciousness. If a full structural replica of a fly brain behaves like a fly, what does that mean for more complex brains? The fly presumably doesn't have subjective experience - or does the digital version? Nobody knows where to draw the line.
The fruit fly was specifically chosen because its nervous system, while complex, is mappable with current imaging technology. The human brain has ~86 billion neurons. We're a long way off, but the direction of travel is clear.