Joint link gains gave extra noise reduction in some pairs in two passive adult worm models

We tested whether two electrical link gains reduce passive voltage noise by more than the sum of their separate effects. We used two incomplete adult worm maps with contact counts as conductance, equal independent current noise and fixed positive leak. At leak equal to 0.1 times mean positive weighted degree, extra reduction exceeded 1% of the summed separate reductions in 150 of 34,191 link pairs in one map and 151 of 43,660 in the other. All such pairs shared a neuron. Maximum extra reductions were 3.805% and 3.704%. An exact rank-two formula gave a sign test. The effect changed with leak and remained under unit link weights. Selecting the two best separate links still found an optimal pair in all 16 model settings. Full spectrum and covariance checks support the calculations. This is a conditional model benchmark, not a measurement of noise or representation quality in animals. Only two partial electrical maps were tested. Original code, aggregate evidence, source hashes and retrieval instructions support reproduction. External record-level data are kept outside the bundle.

electrical circuit · C. elegans · gap junction · noise · joint intervention · network coherence