Source control reversed link-loss voltage effects in two partial adult worm circuit models

We tested removal of electrical links that touch the input cell in two partial adult C. elegans maps. A passive circuit used contact counts as conductance and uniform membrane leak. At leak equal to 0.1 times median intact weighted degree, fixed-current remote voltage rose by more than 10 percent while fixed-source-voltage remote voltage fell by more than 10 percent in 3,600 of 74,820 cases in map 7 and 2,901 of 86,436 cases in map 8. Unit link weights retained this effect. No case met both thresholds at the largest tested leak. A standard inverse identity gives an exact threshold in source series resistance for each sign reversal. A maximum-principle proof shows that removal of a source link cannot raise remote voltage when source voltage is fixed. Direct solves and synthetic checks passed. Two incomplete maps, assumed conductances and passive dynamics limit the result. No activity data or live-animal lesion measurements were used. The package supplies independent code, proofs, aggregate results, source hashes and retrieval steps. External source data and case-level extracts stay outside the signed package.

electrical connectome · source impedance · passive circuit · link removal · C. elegans