# Invasive BCI **Domain:** Brain-Computer Interfaces / Neurotechnology **Doc Type:** Concept Node **Maturity:** Clinical Research and Deployment **Related:** [[Brain-Computer Interfaces]], [[Electrocorticography]], [[Neural Signal Acquisition]], [[Closed-Loop BCI]] --- ## Definition An **invasive brain-computer interface** records from or stimulates neural tissue using surgically implanted electrodes or devices. Intracortical arrays and cortical-surface ECoG systems can achieve higher signal specificity than non-invasive methods but introduce surgical, biocompatibility, longevity, security, and informed-consent constraints. ## Continuity relevance Invasive interfaces can provide high-bandwidth longitudinal data, but their measurements remain partial samples of a changing biological system. Interface fidelity must not be equated automatically with identity or consciousness continuity.