# Polysomnography **Entity class:** Concept or analytic term **Domain:** Sleep Medicine / Neurophysiology **Doc Type:** Scientific Concept Node **Maturity:** Established **Related:** [[Electroencephalography]], [[Electrooculography]], [[Electromyography]], [[DICOM Working Group 32]] --- ## Definition **Polysomnography (PSG)** is a synchronized sleep study combining multiple physiological signals, commonly EEG, EOG, EMG, airflow, respiratory effort, oxygen saturation, and cardiac measures. ## Continuity relevance PSG demonstrates why neural records are often multimodal event systems rather than isolated channels. Sleep stage, vigilance, physiology, and recording conditions affect how electrical brain activity should be interpreted over time. ## Neurotech cluster route **Collection:** [[collections/Neurotech|Neurotech]] **Source articles:** [[articles/The Architecture of Continuity and Emerging Neuroinformatics Standards|The Architecture of Continuity and Emerging Neuroinformatics Standards]] ## Relationships [[wiki/Polysomnography|Polysomnography]] is related to [[collections/Neurotech|Neurotech]] through [[articles/The Architecture of Continuity and Emerging Neuroinformatics Standards|The Architecture of Continuity and Emerging Neuroinformatics Standards]]. <!-- BEGIN HUMANIZED RELATIONSHIPS 2026-09-11 --> This entry's documented connections are expressed in its definition and related-work routes, with provenance retained in the source-linked material. <!-- END HUMANIZED RELATIONSHIPS 2026-09-11 --> ## Related Work in the Corpus <!-- BEGIN HUMANIZED CORPUS ROUTES 2026-09-11 --> - In [[articles/The Architecture of Continuity and Emerging Neuroinformatics Standards|The Architecture of Continuity and Emerging Neuroinformatics Standards]], ****3\. Standardization of Brain-Computer Interfaces (BCI)**** provides the narrative context for **Polysomnography**: Acquisition modalities: EEG · ECoG · MEG · fNIRS · fMRI · EMG · EOG · PSG. <!-- END HUMANIZED CORPUS ROUTES 2026-09-11 -->