Simple Network Mechanism Leads to Quasi-Real Brain Activation Patterns with Drosophila Connectome
CoRR(2024)
摘要
Considering the high computational demands of most methods, using network
communication models to simulate the brain is a more economical way. However,
despite numerous brain network communication models, there is still
insufficient evidence that they can effectively replicate the real activation
patterns of the brain. Moreover, it remains unclear whether actual network
structures are crucial in simulating intelligence. Addressing these issues, we
propose a large scale network communication model based on simple rules and
design criteria to assess the differences between network models and real
situations. We conduct research on the biggest adult Drosophila connectome data
set. Experimental results show significant activation in neurons that should
respond to stimulus and slight activation in irrelevant ones, which we call
quasi-real activation pattern. Besides, when we change the network structure,
the quasi-activation patterns disappear. Interestingly, activation regions have
shorter network distances to their input neurons, implying that the network
structure (not spatial distance) is the core to form brain functionality. In
addition, giving the input neurons a unilateral stimulus, we observe a
bilateral response, which is consistent with reality. Then we find that both
hemispheres have extremely similar statistical indicators. We also develop
real-time 3D large spatial network visualization software to observe and
document experimental phenomena, filling the software gap. This research
reveals network models' power: it can reach the quasi-activation pattern even
with simple propagation rules. Besides, it provides evidence that network
structure matters in brain activity pattern generation. Future research could
fully simulate brain behavior through network models, paving the way for
artificial intelligence by developing new propagation rules and optimizing link
weights.
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