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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Frontiers Media S.A.
2020-10-01
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Series: | Frontiers in Neuroscience |
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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. |
first_indexed | 2024-12-12T23:28:36Z |
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id | doaj.art-af81376bfeaf47f39da593d5c8e8d5dc |
institution | Directory Open Access Journal |
issn | 1662-453X |
language | English |
last_indexed | 2024-12-12T23:28:36Z |
publishDate | 2020-10-01 |
publisher | Frontiers Media S.A. |
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series | Frontiers in Neuroscience |
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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