1     Definition

Neurophysiological Signal Object includes:

  1. Neurophysiological Signal Data representing biosignals captured from neural or neuro‑cognitive processes whose primary structure is a sampled temporal sequence representing time‑series measurements acquired from sensors that capture neural, magnetic, optical, or ocular activity of the human brain or nervous system. These signals are typically continuous or discretely sampled waveforms, possibly multichannel, accompanied by metadata describing the acquisition conditions, sensor characteristics, and timing information.
  2. Neurophysiological Signal Qualifier specified by MPAI‑TFA, providing information about the Sub‑Types, Formats, and Attributes of the Neurophysiological Signal Data.

2       Functional Requirements

Neurophysiological Signal Data satisfies all the following requirements:

1. Time‑Series Structure: The data consists of one or more sequences of samples ordered in time.

2. Neurophysiological Origin: The measured signal reflects a neurophysiological process (e.g., electrical, magnetic, optical, or ocular activity associated with brain or neural function).

3. Sampling Information: The data includes or is associated with sampling metadata (e.g., sampling rate, units, channel count).

4. Sensor‑Based Acquisition: The signal is obtained from a physical sensor or neurophysiological acquisition device (e.g., EEG electrodes, MEG magnetometers, fNIRS optodes, eye‑tracking sensors).

5. Channel Semantics: Each channel corresponds to a defined neurophysiological measurement (e.g., EEG electrode, MEG sensor, fNIRS source‑detector pair, eye‑tracking axis).

6. Acquisition Metadata: The data includes metadata describing the recording context (e.g., device, subject, start time, optional annotations).

3       Syntax

https://schemas.mpai.community/AIH1/V1.0/data/NeurophysiologicalSignalObject.json

4       Semantics

Label Description
Header Neurophysiological Signal Object Header – Standard “AIH‑NSO‑Vx.y”.
NeurophysiologicalSignalObjectID Identifier of the Neurophysiological Signal Object.
EndUserID ID of the End User the Neurophysiological Signal Data refers to.
NeurophysiologicalSignalObjectTime Time information of the Neurophysiological Signal Data.
NeurophysiologicalSignalData Neurophysiological Signal Data per Qualifier.
NeurophysiologicalSignalQualifier Neurophysiological Signal Qualifier.
Trace Provenance information and time of production.
DescrMetadata Descriptive Metadata.