# Effectome **Domain:** Connectomics / Causal Neuroscience **Doc Type:** Technical Concept Node **Maturity:** Research Program **Primary Source:** [[articles/The Art is Long|The Art is Long: Vespucci of Immortality]] **Related:** [[wiki/FlyWire|FlyWire]], [[wiki/Connectomics|Connectomics]], [[wiki/State Sufficiency Problem|State Sufficiency Problem]], [[wiki/Identity-Bearing Invariants|Identity-Bearing Invariants]] --- ## Definition An **effectome** is a causal map of how elements in a neural circuit actually influence one another under intervention, extending beyond the structural paths represented in a connectome. ## Why It Matters A synapse count does not fully specify the sign, gain, neuromodulatory context, plasticity state, or moment-to-moment effectiveness of a connection. Systematic perturbation and observation are required to estimate these causal weights. ## Continuity Boundary The distinction between connectome and effectome is a concrete form of the [[wiki/State Sufficiency Problem|State Sufficiency Problem]]: anatomical persistence can constrain function without completely specifying the active causal state. ## Sources / Provenance - [The fly connectome reveals a path to the effectome](https://www.nature.com/articles/s41586-024-07982-0).