Prefrontal haemodynamics based classification of inter-individual working memory difference

This Letter illustrates prefrontal haemodynamics as a neurovascular basis of inter-personal working memory differences. A functional near-infrared spectroscopy with sampling frequency ∼2 Hz is used to record the blood oxyhaemoglobin and deoxyhaemoglobin signals from 19 subjects engaged in working me...

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Veröffentlicht in:Electronics letters Jg. 56; H. 25; S. 1406 - 1408
1. Verfasser: De, A
Format: Journal Article
Sprache:Englisch
Veröffentlicht: The Institution of Engineering and Technology 10.12.2020
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Abstract This Letter illustrates prefrontal haemodynamics as a neurovascular basis of inter-personal working memory differences. A functional near-infrared spectroscopy with sampling frequency ∼2 Hz is used to record the blood oxyhaemoglobin and deoxyhaemoglobin signals from 19 subjects engaged in working memory task of encoding and retrieval of ten symbol-meaning association learning. The individual difference in working memory performance is classified by supervised learning-based linear discriminant analysis and ensemble classifiers. Prior to the classification approach, individual performance is labelled as high, moderate and low on the basis of the performance index. The spontaneous haemodynamic activity and task-evoked responses are marked as background and foreground signals, respectively, which are scaled by means of stream-independent and stream-dependent models. The classifiers' performance shows that the stream-dependent model-based feature construction-classification improves classification accuracy to a major extent compared to the stream-independent model and no gain model. To understand the neurovascular basis of the inter-individual performance difference, diffused voxel plots are constructed. The voxel plots showed that concurrent activation of orbitofrontal and dorsolateral prefrontal cortex could have a possible association with persons' higher working memory performance.
AbstractList This Letter illustrates prefrontal haemodynamics as a neurovascular basis of inter‐personal working memory differences. A functional near‐infrared spectroscopy with sampling frequency ∼2 Hz is used to record the blood oxyhaemoglobin and deoxyhaemoglobin signals from 19 subjects engaged in working memory task of encoding and retrieval of ten symbol‐meaning association learning. The individual difference in working memory performance is classified by supervised learning‐based linear discriminant analysis and ensemble classifiers. Prior to the classification approach, individual performance is labelled as high, moderate and low on the basis of the performance index. The spontaneous haemodynamic activity and task‐evoked responses are marked as background and foreground signals, respectively, which are scaled by means of stream‐independent and stream‐dependent models. The classifiers' performance shows that the stream‐dependent model‐based feature construction‐classification improves classification accuracy to a major extent compared to the stream‐independent model and no gain model. To understand the neurovascular basis of the inter‐individual performance difference, diffused voxel plots are constructed. The voxel plots showed that concurrent activation of orbitofrontal and dorsolateral prefrontal cortex could have a possible association with persons' higher working memory performance.
This Letter illustrates prefrontal haemodynamics as a neurovascular basis of inter-personal working memory differences. A functional near-infrared spectroscopy with sampling frequency ∼2 Hz is used to record the blood oxyhaemoglobin and deoxyhaemoglobin signals from 19 subjects engaged in working memory task of encoding and retrieval of ten symbol-meaning association learning. The individual difference in working memory performance is classified by supervised learning-based linear discriminant analysis and ensemble classifiers. Prior to the classification approach, individual performance is labelled as high, moderate and low on the basis of the performance index. The spontaneous haemodynamic activity and task-evoked responses are marked as background and foreground signals, respectively, which are scaled by means of stream-independent and stream-dependent models. The classifiers' performance shows that the stream-dependent model-based feature construction-classification improves classification accuracy to a major extent compared to the stream-independent model and no gain model. To understand the neurovascular basis of the inter-individual performance difference, diffused voxel plots are constructed. The voxel plots showed that concurrent activation of orbitofrontal and dorsolateral prefrontal cortex could have a possible association with persons' higher working memory performance.
Author De, A
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Cites_doi 10.3389/fpsyg.2015.00696
10.3389/fpsyg.2014.01099
10.1016/j.neuroscience.2005.07.002
10.3389/fnhum.2020.00236
10.1371/journal.pone.0174949
10.1371/journal.pone.0073735
10.1007/s41465‐019‐00145‐4
10.1111/j.1471‐4159.2009.05926.x
10.3389/fnhum.2018.00246
10.1016/j.cortex.2012.05.022
10.3389/fnhum.2019.00405
10.7554/eLife.31507
10.1109/LSENS.2020.2997641
10.1073/pnas.1601983114
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Issue 25
Keywords task-evoked responses
ensemble classifiers
interpersonal working memory differences
spontaneous haemodynamic activity
sampling frequency
blood oxyhaemoglobin
classification accuracy
dorsolateral prefrontal cortex
classification approach
deoxyhaemoglobin signals
stream-independent model
feature extraction
proteins
orbitofrontal cortex
performance index
learning (artificial intelligence)
linear discriminant analysis
interindividual performance difference
supervised learning-based linear discriminant analysis
symbol-meaning association learning
blood
signal classification
neurovascular basis
prefrontal haemodynamics based classification
working memory task
stream-dependent model-based feature construction-classification
functional near-infrared spectroscopy
infrared spectra
interindividual working memory difference
diffused voxel plots
foreground signals
neurophysiology
haemodynamics
Language English
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Notes A. De: Also with Advanced Technology Development Centre, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
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Snippet This Letter illustrates prefrontal haemodynamics as a neurovascular basis of inter-personal working memory differences. A functional near-infrared spectroscopy...
This Letter illustrates prefrontal haemodynamics as a neurovascular basis of inter‐personal working memory differences. A functional near‐infrared spectroscopy...
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SubjectTerms blood
blood oxyhaemoglobin
classification accuracy
classification approach
deoxyhaemoglobin signals
diffused voxel plots
dorsolateral prefrontal cortex
ensemble classifiers
feature extraction
foreground signals
functional near‐infrared spectroscopy
haemodynamics
infrared spectra
interindividual performance difference
interindividual working memory difference
interpersonal working memory differences
learning (artificial intelligence)
linear discriminant analysis
neurophysiology
neurovascular basis
orbitofrontal cortex
performance index
prefrontal haemodynamics based classification
proteins
sampling frequency
signal classification
Special Issue: Current Trends in Cognitive Science and Brain Computing Research and Applications
spontaneous haemodynamic activity
stream‐dependent model‐based feature construction‐classification
stream‐independent model
supervised learning‐based linear discriminant analysis
symbol‐meaning association learning
task‐evoked responses
working memory task
Title Prefrontal haemodynamics based classification of inter-individual working memory difference
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