Connectome scale
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A Drosophila melanogaster has about 135k neurons, and we only managed to reconstruct its connectome in 2023.
The human brain has 86 billion neurons, about 1 million times more. Therefore, it is obvious that we are very very far away from a full connectome.
Instead however, we could look at larger scales of connectome, and then try from that to extract modules, and then reverse engineer things module by module.
This is likely how we are going to "understand how the human brain works".
Some notable conectomes:
- 2019: 1mm cube of mouse brain: www.nature.com/articles/d41586-019-02208-0
- 2023: Drosophila connectome