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Fig. 10 | BMC Biology

Fig. 10

From: A neuromechanical model for Drosophila larval crawling based on physical measurements

Fig. 10

Intrasegmental excitatory and inhibitory connections are both involved in controlling crawling speed. A The weights of intrasegmental connections between excitatory neurons (wEE) and intrasegmental connections from inhibitory neurons to excitatory neurons (wEI) in the neuromechanical model. B, C Simulation in the optimized condition. B Segmental boundary kymograph. C Activity of excitatory (red line), inhibitory (blue line), and sensory neurons (dotted lines) in a single segment. D, E Simulation in the absence of intrasegmental connections between excitatory neurons. D Segmental boundary kymograph. E Activity of excitatory (red line), inhibitory (blue line), and sensory neurons (dotted lines) in a single segment. F, G Simulation in the absence of intrasegmental connections from inhibitory neurons to excitatory neurons. F Segmental boundary kymograph. G Activity of excitatory (red line), inhibitory (blue line), and sensory neurons (dotted lines) in a single segment. H, I Plots of speed as the weight of intrasegmental connections between excitatory neurons wEE (H) or the weight of connections from inhibitory neurons to excitatory neurons wEI was perturbed (I). Grey-shaded regions show the range of speed observed in the experiment with third-instar larvae. Red dots indicate the optimized simulation condition

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