A single-cell loss could halve model conductance in 31 to 36 percent of path-preserving pairs in two partial worm maps

We tested a passive electrical model in two partial adult C. elegans brain maps. For each endpoint pair, we deleted each other cell in turn. Among pairs that kept a path after every such deletion, 2159 of 5946 in adult 7 (36.31 percent) and 2198 of 7170 in adult 8 (30.66 percent) lost more than half their effective conductance after at least one deletion. With unit conductance per link, the shares were 26.03 and 23.46 percent. Common-node graphs gave 33.30 and 24.35 percent. Bilateral partners had lower descriptive shares, without degree or spatial controls. Their worst-retention ranks had correlation 0.506 across 42 shared qualifying pairs. Independent traversal and grounded equations checked the results. Incomplete electrical annotation, two partial maps, and passive model assumptions prevent claims about live-animal lesions or reliable representations. Code, pair tables, lesion tables, source hashes, and retrieval steps support reproduction.

C. elegans · gap junction · effective conductance · cell loss · circuit robustness · passive model