Different roles for theta- and alpha-band brain rhythms during sequential memory

Takase, Ryoken; Boasen, Jared; Yokosawa, Kazuhiko

doi:10.1109/embc.2019.8856816

Cited by 6 publications

(5 citation statements)

References 26 publications

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“…We recorded MEG during a visual sequential memory task with two different ISIs between memory item presentations. An initial investigation of this work confirmed the importance of theta oscillatory activity (5–7 Hz) via time-frequency analysis [ 28 ]. In the present report, we expand our investigation by focusing in detail specifically on the relationship between theta activity and memory performance.…”

Section: Introductionsupporting

confidence: 55%

“…Then, seven arrows, randomly directed either right, left, up, or down, appeared sequentially on the right side of the fixation target. The presentation duration of each arrow in both tasks was 0.1 s. The ISI between the offset and onset of arrow presentations in the fast task was 0.15 s and was based on preliminary experiments [ 28 ] where it was adjusted such that its time length was less than half that of the slow task while still producing accuracies above chance level (25%). The ISI between the offset and onset of arrow presentations in the slow task was 0.5 s, and was based on our prior studies using this sequential memory task [ 31 , 32 ].…”

Section: Methodsmentioning

confidence: 99%

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Processing time affects sequential memory performance beginning at the level of visual encoding

et al. 2022

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Electrophysiological studies have demonstrated that theta-band activity is useful for investigating neural mechanisms of memory. However, mechanisms specifically driving memory performance remain poorly understood. In sequential memory, performance can be artificially attenuated by shortening the inter-stimulus interval (ISI) between memory item presentations. Therefore, we sought to clarify the mechanisms of sequential memory performance by analyzing theta-band (4–8 Hz) activity recorded via magnetoencephalogram in 33 participants during performance of a sequential memory task where memory items were presented at either slow or fast rates in accordance with longer or shorter ISIs, respectively. Particularly in the slow task, theta activity clearly modulated in accordance with the presentation of memory items. Common cortical target regions in the occipital and frontal cortex were identified in both tasks and related to visual encoding and memory maintenance, respectively. Compared to the slow task, occipital-theta activity was significantly lower in the fast task from the midterm until the ending of encoding, in correspondence with significantly lower recall for memory items in this same period. Meanwhile, despite a loss of clarity in responsiveness to individual memory items in the fast task, frontal-theta activity was not different between tasks and exhibited particularly strong responses in both tasks during the holding period prior to recall. Our results indicate that shorter processing time erodes sequential memory performance beginning at the level of visual encoding.

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Section: Introductionsupporting

confidence: 55%

Section: Methodsmentioning

confidence: 99%

Processing time affects sequential memory performance beginning at the level of visual encoding

et al. 2022

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“…Indeed, working memory retention is regarded as a key function in auditory communication that permits the listener to hold incoming auditory information while deciphering its semantic and episodic relevance ( Lemke and Besser, 2016 ). Event-related alpha synchronization distributed across parietal-occipital sensors ( Wianda and Ross, 2019 ) and brain areas ( Takase et al, 2019 ) is a typical characteristic observed during visual memory retention, with the extent of synchronization linked to memory load ( Hu et al, 2019 ; Proskovec et al, 2019 ). Compared to visual memory, publications based on auditory memory are scant.…”

Section: Discussionmentioning

confidence: 99%

Magnetoencephalography Hyperscanning Evidence of Differing Cognitive Strategies Due to Social Role During Auditory Communication

et al. 2022

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Auditory communication is an essential form of human social interaction. However, the intra-brain cortical-oscillatory drivers of auditory communication exchange remain relatively unexplored. We used improvisational music performance to simulate and capture the creativity and turn-taking dynamics of natural auditory communication. Using magnetoencephalography (MEG) hyperscanning in musicians, we targeted brain activity during periods of music communication imagery, and separately analyzed theta (5–7 Hz), alpha (8–13 Hz), and beta (15–29 Hz) source-level activity using a within-subjects, two-factor approach which considered the assigned social role of the subject (leader or follower) and whether communication responses were improvisational (yes or no). Theta activity related to improvisational communication and social role significantly interacted in the left isthmus cingulate cortex. Social role was furthermore differentiated by pronounced occipital alpha and beta amplitude increases suggestive of working memory retention engagement in Followers but not Leaders. The results offer compelling evidence for both musical and social neuroscience that the cognitive strategies, and correspondingly the memory and attention-associated oscillatory brain activities of interlocutors during communication differs according to their social role/hierarchy, thereby indicating that social role/hierarchy needs to be controlled for in social neuroscience research.

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“…The alpha-band rhythm has advantageous characteristics for study, with a large amplitude and wide modulation, and there is considerable evidence indicating its involvement in short-term memory and WM processing ( Foster et al, 2016 ; Wianda and Ross, 2019 ). Therefore, we compared the roles of alpha- and theta-band rhythm in our previous study ( Takase et al, 2019 ). When young participants performed a sequential memory task similar to that used in the current study, the alpha-band rhythm contributed exclusively to the active inhibition of task-irrelevant inputs, whereas cortical theta-band rhythm was associated with memory performance.…”

Section: Introductionmentioning

confidence: 99%

Differential working memory function between phonological and visuospatial strategies: a magnetoencephalography study using a same visual task

Onishi,

Yokosawa

2023

Front. Hum. Neurosci.

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Previous studies have reported that, in working memory, the processing of visuospatial information and phonological information have different neural bases. However, in these studies, memory items were presented via different modalities. Therefore, the modality in which the memory items were presented and the strategy for memorizing them were not rigorously distinguished. In the present study, we explored the neural basis of two working memory strategies. Nineteen right-handed young adults memorized seven sequential directions presented visually in a task in which the memory strategy was either visuospatial or phonological (visuospatial/phonological condition). Source amplitudes of theta-band (5–7 Hz) rhythm were estimated from magnetoencephalography during the maintenance period and further analyzed using cluster-based permutation tests. Behavioral results revealed that the accuracy rates showed no significant differences between conditions, while the reaction time in the phonological condition was significantly longer than that in the visuospatial condition. Theta activity in the phonological condition was significantly greater than that in the visuospatial condition, and the cluster in spatio-temporal matrix with p < 5% difference extended to right prefrontal regions in the early maintenance period and right occipito-parietal regions in the late maintenance period. The theta activity results did not indicate strategy-specific neural bases but did reveal the dynamics of executive function required for phonological processing. The functions seemed to move from attention control and inhibition control in the prefrontal region to inhibition of irrelevant information in the occipito-parietal region.

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Different roles for theta- and alpha-band brain rhythms during sequential memory

Cited by 6 publications

References 26 publications

Processing time affects sequential memory performance beginning at the level of visual encoding

Processing time affects sequential memory performance beginning at the level of visual encoding

Magnetoencephalography Hyperscanning Evidence of Differing Cognitive Strategies Due to Social Role During Auditory Communication

Differential working memory function between phonological and visuospatial strategies: a magnetoencephalography study using a same visual task

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