# Ephaptic Coupling **Domain:** Neuroscience / Electrophysiology **Doc Type:** Technical Concept Node **Maturity:** Experimentally supported; role and scale remain active research questions **Related:** [[Traveling Waves]], [[Effective Connectivity]], extracellular electric fields, [[Nonlinear Dynamics]] --- ## Definition **Ephaptic coupling** is the influence of extracellular electric fields on nearby neuronal membrane potentials and spiking without requiring a direct synaptic connection between the affected cells. ## Architectural Significance Neuronal activity generates electric fields, and those fields can in turn alter neuronal activity. In [[articles/Analog Cognition and the Architecture of Continuity|Analog Cognition and the Architecture of Continuity]], this provides a physically ordinary feedback path through which a distributed state generated by local components can become one of the conditions governing their subsequent behavior. ## Sources / Provenance - Picower Institute, [Electric fields help guide neural activity, even from moment to moment](https://picower.mit.edu/news/electric-fields-help-guide-neural-activity-even-moment-moment) - Earl K. Miller, Scott L. Brincat, and Jefferson E. Roy, [Analog Cognition and Consciousness](https://doi.org/10.1523/JNEUROSCI.0711-26.2026), _The Journal of Neuroscience_ (2026)