Individual differences in oscillatory brain activity in response to varying attentional demands during a word recall and oculomotor dual task
Every day, we face situations that involve multi-tasking. How our brain utilizes cortical resources during multi-tasking is one of many interesting research topics. In this study, we tested whether a dual-task can be differentiated in the neural and behavioral responses of healthy subjects with vary...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2015-06-01
|
| Series: | Frontiers in Human Neuroscience |
| Subjects: | |
| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fnhum.2015.00381/full |
| _version_ | 1818033545188212736 |
|---|---|
| author | Gusang eKwon Gusang eKwon Sanghyun eLim Sanghyun eLim Min-Young eKim Hyukchan eKwon Yong-Ho eLee Kiwoong eKim Kiwoong eKim Eun-Ju eLee Minah eSuh Minah eSuh Minah eSuh Minah eSuh |
| author_facet | Gusang eKwon Gusang eKwon Sanghyun eLim Sanghyun eLim Min-Young eKim Hyukchan eKwon Yong-Ho eLee Kiwoong eKim Kiwoong eKim Eun-Ju eLee Minah eSuh Minah eSuh Minah eSuh Minah eSuh |
| author_sort | Gusang eKwon |
| collection | DOAJ |
| description | Every day, we face situations that involve multi-tasking. How our brain utilizes cortical resources during multi-tasking is one of many interesting research topics. In this study, we tested whether a dual-task can be differentiated in the neural and behavioral responses of healthy subjects with varying degree of working memory capacity (WMC). We combined word recall and oculomotor tasks because they incorporate common neural networks including the fronto-parietal (FP) network. Three different types of oculomotor tasks (eye fixation; Fix-EM, predictive & random smooth pursuit eye movement; P-SPEM & R-SPEM) were combined with two memory load levels (low-load: 5 words, high-load: 10 words) for a word recall task. Each of those dual-task combinations was supposed to create varying cognitive loads on the FP network. We hypothesize that each dual-task requires different cognitive strategies for allocating the brain’s limited cortical resources and affects brain oscillation of the FP network. In addition, we hypothesized that groups with different WMC will show differential neural and behavioral responses. We measured oscillatory brain activity with simultaneous MEG and EEG recordings and behavioral performance by word recall. Prominent frontal midline (FM) theta (4-6 Hz) synchronization emerged in the EEG of the high-WMC group experiencing R-SPEM with high-load conditions during the early phase of the word maintenance period. Conversely, significant parietal upper alpha (10-12 Hz) desynchronization was observed in the EEG and MEG of the low-WMC group experiencing P-SPEM under high-load conditions during the same period. Different brain oscillatory patterns seem to depend on each individual’s WMC and varying attentional demands from different dual-task combinations. These findings suggest that specific brain oscillations may reflect different strategies for allocating cortical resources during combined word recall and oculomotor dual-tasks. |
| first_indexed | 2024-12-10T06:24:58Z |
| format | Article |
| id | doaj.art-c6537642e26940609cbc9a893dc66af3 |
| institution | Directory Open Access Journal |
| issn | 1662-5161 |
| language | English |
| last_indexed | 2024-12-10T06:24:58Z |
| publishDate | 2015-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Human Neuroscience |
| spelling | doaj.art-c6537642e26940609cbc9a893dc66af32022-12-22T01:59:15ZengFrontiers Media S.A.Frontiers in Human Neuroscience1662-51612015-06-01910.3389/fnhum.2015.00381141223Individual differences in oscillatory brain activity in response to varying attentional demands during a word recall and oculomotor dual taskGusang eKwon0Gusang eKwon1Sanghyun eLim2Sanghyun eLim3Min-Young eKim4Hyukchan eKwon5Yong-Ho eLee6Kiwoong eKim7Kiwoong eKim8Eun-Ju eLee9Minah eSuh10Minah eSuh11Minah eSuh12Minah eSuh13Sungkyunkwan UniversitySungkyunkwan UniversityKorea Research Institute of Standards and ScienceUniversity of Science and TechnologyKorea Research Institute of Standards and ScienceKorea Research Institute of Standards and ScienceKorea Research Institute of Standards and ScienceKorea Research Institute of Standards and ScienceUniversity of Science and TechnologySungkyunkwan UniversitySungkyunkwan UniversitySungkyunkwan UniversitySungkyunkwan UniversitySungkyunkwan UniversityEvery day, we face situations that involve multi-tasking. How our brain utilizes cortical resources during multi-tasking is one of many interesting research topics. In this study, we tested whether a dual-task can be differentiated in the neural and behavioral responses of healthy subjects with varying degree of working memory capacity (WMC). We combined word recall and oculomotor tasks because they incorporate common neural networks including the fronto-parietal (FP) network. Three different types of oculomotor tasks (eye fixation; Fix-EM, predictive & random smooth pursuit eye movement; P-SPEM & R-SPEM) were combined with two memory load levels (low-load: 5 words, high-load: 10 words) for a word recall task. Each of those dual-task combinations was supposed to create varying cognitive loads on the FP network. We hypothesize that each dual-task requires different cognitive strategies for allocating the brain’s limited cortical resources and affects brain oscillation of the FP network. In addition, we hypothesized that groups with different WMC will show differential neural and behavioral responses. We measured oscillatory brain activity with simultaneous MEG and EEG recordings and behavioral performance by word recall. Prominent frontal midline (FM) theta (4-6 Hz) synchronization emerged in the EEG of the high-WMC group experiencing R-SPEM with high-load conditions during the early phase of the word maintenance period. Conversely, significant parietal upper alpha (10-12 Hz) desynchronization was observed in the EEG and MEG of the low-WMC group experiencing P-SPEM under high-load conditions during the same period. Different brain oscillatory patterns seem to depend on each individual’s WMC and varying attentional demands from different dual-task combinations. These findings suggest that specific brain oscillations may reflect different strategies for allocating cortical resources during combined word recall and oculomotor dual-tasks.http://journal.frontiersin.org/Journal/10.3389/fnhum.2015.00381/fullworking memory capacitydual-taskfrontal midline thetaMEG and EEGAlpha band desynchronizationOculomotor task |
| spellingShingle | Gusang eKwon Gusang eKwon Sanghyun eLim Sanghyun eLim Min-Young eKim Hyukchan eKwon Yong-Ho eLee Kiwoong eKim Kiwoong eKim Eun-Ju eLee Minah eSuh Minah eSuh Minah eSuh Minah eSuh Individual differences in oscillatory brain activity in response to varying attentional demands during a word recall and oculomotor dual task Frontiers in Human Neuroscience working memory capacity dual-task frontal midline theta MEG and EEG Alpha band desynchronization Oculomotor task |
| title | Individual differences in oscillatory brain activity in response to varying attentional demands during a word recall and oculomotor dual task |
| title_full | Individual differences in oscillatory brain activity in response to varying attentional demands during a word recall and oculomotor dual task |
| title_fullStr | Individual differences in oscillatory brain activity in response to varying attentional demands during a word recall and oculomotor dual task |
| title_full_unstemmed | Individual differences in oscillatory brain activity in response to varying attentional demands during a word recall and oculomotor dual task |
| title_short | Individual differences in oscillatory brain activity in response to varying attentional demands during a word recall and oculomotor dual task |
| title_sort | individual differences in oscillatory brain activity in response to varying attentional demands during a word recall and oculomotor dual task |
| topic | working memory capacity dual-task frontal midline theta MEG and EEG Alpha band desynchronization Oculomotor task |
| url | http://journal.frontiersin.org/Journal/10.3389/fnhum.2015.00381/full |
| work_keys_str_mv | AT gusangekwon individualdifferencesinoscillatorybrainactivityinresponsetovaryingattentionaldemandsduringawordrecallandoculomotordualtask AT gusangekwon individualdifferencesinoscillatorybrainactivityinresponsetovaryingattentionaldemandsduringawordrecallandoculomotordualtask AT sanghyunelim individualdifferencesinoscillatorybrainactivityinresponsetovaryingattentionaldemandsduringawordrecallandoculomotordualtask AT sanghyunelim individualdifferencesinoscillatorybrainactivityinresponsetovaryingattentionaldemandsduringawordrecallandoculomotordualtask AT minyoungekim individualdifferencesinoscillatorybrainactivityinresponsetovaryingattentionaldemandsduringawordrecallandoculomotordualtask AT hyukchanekwon individualdifferencesinoscillatorybrainactivityinresponsetovaryingattentionaldemandsduringawordrecallandoculomotordualtask AT yonghoelee individualdifferencesinoscillatorybrainactivityinresponsetovaryingattentionaldemandsduringawordrecallandoculomotordualtask AT kiwoongekim individualdifferencesinoscillatorybrainactivityinresponsetovaryingattentionaldemandsduringawordrecallandoculomotordualtask AT kiwoongekim individualdifferencesinoscillatorybrainactivityinresponsetovaryingattentionaldemandsduringawordrecallandoculomotordualtask AT eunjuelee individualdifferencesinoscillatorybrainactivityinresponsetovaryingattentionaldemandsduringawordrecallandoculomotordualtask AT minahesuh individualdifferencesinoscillatorybrainactivityinresponsetovaryingattentionaldemandsduringawordrecallandoculomotordualtask AT minahesuh individualdifferencesinoscillatorybrainactivityinresponsetovaryingattentionaldemandsduringawordrecallandoculomotordualtask AT minahesuh individualdifferencesinoscillatorybrainactivityinresponsetovaryingattentionaldemandsduringawordrecallandoculomotordualtask AT minahesuh individualdifferencesinoscillatorybrainactivityinresponsetovaryingattentionaldemandsduringawordrecallandoculomotordualtask |