# Synapse **Collection:** [[collections/Neurotech|Neurotech]] **Type:** Neural junction concept **Primary sources:** [[articles/2026 Annual Report on Brain-Computer Interfaces|2026 Annual Report on Brain-Computer Interfaces]]; [[articles/The Organic-Synthetic Brain Atlas|The Organic-Synthetic Brain Atlas]] ## Definition A **synapse** is a specialized junction through which a neuron influences another cell through chemical or electrical signaling. ## Relationships - Synapses form the edges of synapse-resolution [[wiki/Connectome|connectomes]]. - [[wiki/FlyWire|FlyWire]] reports 54.5 million synapses; [[wiki/MICrONS|MICrONS]] reports 523 million in its reconstructed volume. - A structural synapse does not by itself specify effective strength, sign, plasticity, or current state.