Cognitive Signal Generation Unit for Brain Potential Measurement
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Solution Overview
Problem
The measurement accuracy of cognitive potential, such as the P300, is deteriorated when motor readiness potential is present, as it is included in the event-related potential.
Innovation Solution
A cognitive ability detection device with a brain signal acquisition unit, a correction data storage unit, and a cognitive signal generation unit that corrects brain signals using motor readiness potential correction data to suppress the motor readiness potential, thereby improving the measurement accuracy of cognitive potential.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If motor readiness potential is included in event-related potential measurement, then the brain signal contains both cognitive and motor information, but the measurement accuracy of cognitive potential deteriorates
Solution Approach 1:
The patent segments the event-related potential into distinct components: cognitive potential and motor readiness potential. By separating these overlapping signals through component analysis, the system can independently measure each potential without interference, thus resolving the contradiction between containing both information types and maintaining measurement accuracy.
Solution Approach 2:
The patent extracts the motor readiness potential component from the composite event-related potential signal. By identifying and removing the motor component through signal processing techniques, the system isolates the cognitive potential for accurate measurement while preserving the ability to analyze motor information separately if needed.
2Adaptability or versatility
If motor readiness potential is present in the brain signal, then action-related information is available, but the cognitive potential measurement becomes inaccurate
Solution Approach 1:
The patent employs dynamic signal processing that adapts to the temporal characteristics of different brain potentials. By using time-varying analysis methods and adjusting processing parameters based on the detected signal characteristics, the system maintains high measurement accuracy for cognitive potential while preserving the ability to detect motor readiness potential when present.
Data Source
AI summary
A cognitive signal generation unit of a cognitive ability detection device includes a brain signal acquisition unit, a database, an MRCP correction data selection unit, and a calculation unit. The brain signal acquisition unit acquires a brain signal including an event-related potential. The database stores motor readiness potential correction data corresponding to an operation of a subject. The MRCP correction data selection unit selects the motor readiness potential correction data, on the basis of prior information including the type of an action, and outputs the motor readiness potential correction data to the calculation unit. The calculation unit generates the cognitive signal by correcting the brain signal with the motor readiness potential correction data.