Altered EEG Signal Complexity Induced by Hand Proximity: A Multiscale Entropy Approach

Visual short-term memory (VSTM) is an important cognitive function that acts as a temporary storage for visual information. Previous studies have shown that VSTM capacity can be modulated by the location of one’s hands, where hand proximity enhances neural processing and memory of nearby visual stim...

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Main Authors: Philip Tseng, Yu-Hui Lo
Format: Article
Language:English
Published: Frontiers Media S.A. 2020-10-01
Series:Frontiers in Neuroscience
Subjects:
Online Access:https://www.frontiersin.org/article/10.3389/fnins.2020.562132/full
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author Philip Tseng
Philip Tseng
Philip Tseng
Yu-Hui Lo
author_facet Philip Tseng
Philip Tseng
Philip Tseng
Yu-Hui Lo
author_sort Philip Tseng
collection DOAJ
description Visual short-term memory (VSTM) is an important cognitive function that acts as a temporary storage for visual information. Previous studies have shown that VSTM capacity can be modulated by the location of one’s hands, where hand proximity enhances neural processing and memory of nearby visual stimuli. The present study used traditional event-related potentials (ERP) along with multiscale entropy (MSE) analysis to shed light on the neural mechanism(s) behind such near-hand effect. Participants’ electroencephalogram (EEG) data were recorded as they performed a VSTM task with their hands either proximal or distal to the display. ERP analysis showed altered memory processing in the 400–700 ms time window during memory retrieval period. Importantly, MSE analysis also showed significant EEG difference between hand proximal and distal conditions between scales 10 to 20, and such difference is clustered around the right parietal cortex – a region that is involved in VSTM processing and bimodal hand-eye integration. The implications of higher MSE time scale in the parietal cortex are discussed in the context of signal complexity and its possible relation to cognitive processing. To our knowledge, this study provides the first investigation using MSE to characterize the temporal characteristics and signal complexity behind the effect of hand proximity.
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spelling doaj.art-af81376bfeaf47f39da593d5c8e8d5dc2022-12-22T00:07:54ZengFrontiers Media S.A.Frontiers in Neuroscience1662-453X2020-10-011410.3389/fnins.2020.562132562132Altered EEG Signal Complexity Induced by Hand Proximity: A Multiscale Entropy ApproachPhilip Tseng0Philip Tseng1Philip Tseng2Yu-Hui Lo3Graduate Institute of Mind, Brain and Consciousness, Taipei Medical University, Taipei, TaiwanBrain and Consciousness Research Center, TMU-Shuang Ho Hospital, New Taipei City, TaiwanPsychiatric Research Center, Wan Fang Hospital, Taipei Medical University, Taipei, TaiwanBrain and Consciousness Research Center, TMU-Shuang Ho Hospital, New Taipei City, TaiwanVisual short-term memory (VSTM) is an important cognitive function that acts as a temporary storage for visual information. Previous studies have shown that VSTM capacity can be modulated by the location of one’s hands, where hand proximity enhances neural processing and memory of nearby visual stimuli. The present study used traditional event-related potentials (ERP) along with multiscale entropy (MSE) analysis to shed light on the neural mechanism(s) behind such near-hand effect. Participants’ electroencephalogram (EEG) data were recorded as they performed a VSTM task with their hands either proximal or distal to the display. ERP analysis showed altered memory processing in the 400–700 ms time window during memory retrieval period. Importantly, MSE analysis also showed significant EEG difference between hand proximal and distal conditions between scales 10 to 20, and such difference is clustered around the right parietal cortex – a region that is involved in VSTM processing and bimodal hand-eye integration. The implications of higher MSE time scale in the parietal cortex are discussed in the context of signal complexity and its possible relation to cognitive processing. To our knowledge, this study provides the first investigation using MSE to characterize the temporal characteristics and signal complexity behind the effect of hand proximity.https://www.frontiersin.org/article/10.3389/fnins.2020.562132/fullentropymultiscale entropycomplexityEEGaction
spellingShingle Philip Tseng
Philip Tseng
Philip Tseng
Yu-Hui Lo
Altered EEG Signal Complexity Induced by Hand Proximity: A Multiscale Entropy Approach
Frontiers in Neuroscience
entropy
multiscale entropy
complexity
EEG
action
title Altered EEG Signal Complexity Induced by Hand Proximity: A Multiscale Entropy Approach
title_full Altered EEG Signal Complexity Induced by Hand Proximity: A Multiscale Entropy Approach
title_fullStr Altered EEG Signal Complexity Induced by Hand Proximity: A Multiscale Entropy Approach
title_full_unstemmed Altered EEG Signal Complexity Induced by Hand Proximity: A Multiscale Entropy Approach
title_short Altered EEG Signal Complexity Induced by Hand Proximity: A Multiscale Entropy Approach
title_sort altered eeg signal complexity induced by hand proximity a multiscale entropy approach
topic entropy
multiscale entropy
complexity
EEG
action
url https://www.frontiersin.org/article/10.3389/fnins.2020.562132/full
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