sentences:  Using a method to ablate specific neurons, the ablation of the aCC axon, which plays a role in pioneering the intersegmental nerve in the "Drosophila" PNS, resulted in the three typical follower axons becoming delayed and prone to pathfinding errors.Despite these consequences, eventually the pathway was formed in the majority of subjects.Ablation of the pioneer axons that formed the longitudinal tracts in the "Drosophila" CNS resulted in similar difficulties in the formation and organization of longitudinal pathways in 70% of observed segments.