March 13, 2025
New research uses AI to unravel the complex wiring of the motor system
News2025-03-13
The nervous system is a marvel of biological engineering, composed of intricate networks that control every aspect of an animal's movement and behavior. A fundamental question in neuroscience is how these vast, complex circuits are assembled during development. A recent study by a group of researchers including Erdem Varol, Assistant Professor of Computer Science and Engineering and a member of the Visualization, Imaging and Data Analysis Center, has provided new insights into this problem by studying how the neurons responsible for leg movement in fruit flies (Drosophila melanogaster) establish their connections.
The researchers developed ConnectionMiner, a novel computational tool that integrates gene expression data with electron microscopy-derived connectomes. This tool enabled them to infer neuronal identities and predict synaptic connectivity with remarkable accuracy. Their findings, published on bioRxiv [PDF], offer a blueprint for understanding how neurons wire themselves into functional circuits.
Neurons form connections based on genetic and molecular cues, but identifying the precise mechanisms behind this process has been difficult. In the fruit fly, roughly 69 motor neurons (MNs) in each leg are responsible for controlling movement. These neurons receive input from more than 1,500 premotor neurons (preMNs) through over 200,000 synapses. The challenge lies in understanding how each MN finds the right preMN partners and how these connections are established at the molecular level.
Neurons form connections based on genetic and molecular cues, but identifying the precise mechanisms behind this process has been difficult. In the fruit fly, roughly 69 motor neurons (MNs) in each leg are responsible for controlling movement. These neurons receive input from more than 1,500 premotor neurons (preMNs) through over 200,000 synapses. The challenge lies in understanding how each MN finds the right preMN partners and how these connections are established at the molecular level.