Electrical links found in two maps gave no clear extra calcium correlation term at fixed contact count in 21 C. elegans recordings

We tested whether an electrical link found in both adult reference maps has more calcium coactivity than a link found in one map at the same total exported contact count. We used all 21 labeled baseline Atanas and Kim recordings, exact neuron identities, and the complete available chemical graphs of the two Witvliet adult maps. The common sample contained 8,168 named pairs and 55,274 animal-pair entries. The model controlled for neuron effects, measured behavior, chemical wiring, reference position, and exact electrical count. The mean extra term was 0.0225 Fisher z units, with a 95% animal bootstrap interval of -0.0179 to 0.0621. Only 19 distinct links found in one map had counts shared with links found in both. Class deletion changed the estimate sign. A model restricted to links at shared counts could not separate map agreement from its controls in any recording. The result does not establish equal function. Electrical annotations are incomplete, and the interval conditions on fixed reference maps. We preserve all code, derived data, source checksums, figures, and reproduction instructions.

connectome · electrical synapse · calcium activity · Caenorhabditis elegans · anatomical variability · gap junction · structure and function