Two are better than one: Differences in cortical EEG patterns during auditory and visual verbal working memory processing between Unilateral and Bilateral Cochlear Implanted children

Hearing Research, Год журнала: 2024, Номер 446, С. 109007 - 109007

Опубликована: Апрель 5, 2024

Despite the proven effectiveness of cochlear implant (CI) in hearing restoration deaf or hard-of-hearing (DHH) children, to date, extreme variability verbal working memory (VWM) abilities is observed both unilateral and bilateral CI user children (CIs). Although clinical experience has long deficits this fundamental executive function CIs, cause date still unknown. Here, we have set out investigate differences brain functioning regarding impact monaural binaural listening CIs compared with normal (NH) peers during a three-level difficulty n-back task undertaken two sensory modalities (auditory visual). The objective pioneering study was identify electroencephalographic (EEG) marker pattern visual auditory VWM performances NH possible between (UCI) (BCI) users. main results revealed theta gamma EEG bands. Compared controls BCIs, UCIs showed hypoactivation frontal area most complex condition correlation same activation performance. Hypoactivation also observed, again for UCIs, left hemisphere when BCIs band NHs. For latter two, found hemispheric oscillation performance audio task. These findings, discussed light recent research, suggest that deficient supporting DHH. At time, would allow DHH child approach benchmark children. present suggests supporting, through targeted approach, diagnosis rehabilitation

Язык: Английский

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The Intensity of Internal and External Attention Assessed with Pupillometry

Journal of Cognition, Год журнала: 2024, Номер 7(1), С. 8 - 8

Опубликована: Янв. 9, 2024

Not only is visual attention shifted to objects in the external world, can also be directed memory. We have recently shown that pupil size indexes how strongly items are attended externally, which was reflected more precise encoding into working Using a retro-cuing paradigm, we here replicated this finding by showing stronger constrictions during were reflective of depth encoding. Importantly, extend previous work revealed intensity internal toward content stored Specifically, dilation prioritization one among multiple internally representations predicted precision prioritized item. Furthermore, dynamics pupillary responses and independently determined internalized representations. Our results show both not all-or-none processes, but should rather thought as continuous resources deployed at varying intensities. The employed pupillometric approach allows unravel intricate interplay between their effects on

Язык: Английский

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Exploring Central-Peripheral Nervous System Interaction Through Multimodal Biosignals: A Systematic Review

IEEE Access, Год журнала: 2024, Номер 12, С. 60347 - 60368

Опубликована: Янв. 1, 2024

The interaction between the central nervous system (CNS) and peripheral (PNS) governs various physiological functions, influences cognitive processes emotional states. It is necessary to unravel mechanisms governing brain body, enhancing our understanding of physical mental well-being. Neuro-ergonomics-based human-computer can be improved by comprehending intricate interrelation CNS PNS. Various studies have been explored using diverse methodologies study CNS-PNS in specific psychophysiological states, such as emotion, stress, or tasks. However, there a need for thorough, extensive, systematic review covering forms, applications, assessments. In this work, an attempt has made perform that examines PNS across focusing on varied signals. For this, scientific repositories, namely Scopus, PubMed, Association Computing Machinery, Web Science, are accessed. total, 61 articles identified within period January 2008 April 2023 review. selected research analyzed based factors, subject information, stimulation modality, types interactions other organs, feature extraction techniques, classification methods, statistical approaches. evaluation existing literature indicates scarcity publicly available databases limited application machine learning deep learning-based advanced tools. Furthermore, underscores urgent enhancements several key areas including development more refined psycho-physiological model, analysis better electrode-surface interface technology. Additionally, involving daily life activities, female-oriented studies, privacy considerations. This contributes standardizing protocols, improves diagnostic relevance instruments, extracts reliable biomarkers. novelty lies guiding researchers point out issues potential solutions future field bio-signal-based interaction.

Язык: Английский

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Working memory processes and intrinsic motivation: An EEG study

International Journal of Psychophysiology, Год журнала: 2024, Номер 201, С. 112355 - 112355

Опубликована: Май 6, 2024

Processes typically encompassed by working memory (WM) include encoding, retention, and retrieval of information. Previous research has demonstrated that motivation can influence WM performance, although the specific processes affected are not yet fully understood. In this study, we investigated effects on different processes, examining how task difficulty modulates these effects. We hypothesized level personality traits participants (N = 48, 32 females; mean age 21) would modulate parietal alpha frontal theta electroencephalography (EEG) correlates phases Sternberg task. This effect was expected to be more pronounced under conditions very high difficulty. found increasing led reduced accuracy increased response time, but no significant relationship between accuracy. However, EEG data revealed influenced as indicated changes in oscillations. Specifically, higher levels Resilience trait—associated with mental toughness, hardiness, self-efficacy, achievement motivation, low anxiety—were related desynchronization during encoding retrieval. Increased scores Subjective Motivation perform well were enhanced midline retention. Additionally, significantly stronger These findings provide insights into underscore importance considering both intrinsic research.

Язык: Английский

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Dynamic resource allocation strategies in the human brain under cognitive overload: evidence from time-varying brain network analysis

Cerebral Cortex, Год журнала: 2025, Номер 35(3)

Опубликована: Март 1, 2025

Abstract The impact of excessive cognitive workload on personal work and life is widely recognized, yet the brain information processing mechanisms under overload remain unclear. This study employed a spatial configuration task, combined with time-varying network analysis source localization techniques based electroencephalography signals, to delve into dynamic adjustment processes among healthy participants during overload. results revealed that overload, overall activation level significantly decreases, characteristics delayed responses. Further indicated connectivity in right hemisphere networks closely associated object recognition was weakened. In contrast, connections between left are enhanced. These changes suggest prioritizes resource allocation support memory functions, which might lead restricted resources for subsequent processing. Notably, significant differences observed hippocampus, fusiform gyrus, superior frontal gyrus make them important potential markers identifying states tasks. provides fresh perspective scientific foundation understanding performance.

Язык: Английский

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Age-related changes in “cortical” 1/f dynamics are linked to cardiac activity

Опубликована: Апрель 14, 2025

The power of electrophysiologically measured cortical activity decays with an approximately 1/f X function. slope this decay (i.e. the spectral exponent, ) is modulated by various factors such as age, cognitive states or psychiatric/neurological disorders. Interestingly, a mostly parallel line research has also uncovered similar effects for in electrocardiogram (ECG). This raises question whether these bodywide changes slopes are (in-)dependent. Focusing on well-established age-related we analyzed total 1282 recordings magnetoencephalography (MEG) resting state measurements concurrent ECG age-diverse sample (18-88 years). Using diverse array analytical approaches, demonstrate that aperiodic signal recorded via surface electrodes/sensors originates from multiple physiological sources. Furthermore, our results suggest common “artifact” rejection approaches ICA) may not be sufficient to separate cardiac neural activity. In particular, significant parts normally interpreted origin can explained Moreover, (flattening/steepening) age dependent recording site and investigated frequency range. Our highlight complexity while raising concerns when interpreting “cortical“ without considering influences.

Язык: Английский

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Effects of off-line auricular transcutaneous vagus nerve stimulation (taVNS) on a short-term memory task: a pilot study

Frontiers in Aging Neuroscience, Год журнала: 2025, Номер 17

Опубликована: Апрель 28, 2025

One of the commonly used indices short-term memory (STM) is digit span task. Prior studies have proposed pupil dilation as a measure task engagement and promising biomarker vagal activation. Transcutaneous auricular vagus nerve stimulation (taVNS) novel non-invasive brain technique which might be to improve cognition modulate size through its effects on noradrenergic release in locus coeruleus. No previous study has investigated off-line taVNS With this single-blind, sham-controlled, crossover design trial, we aimed assess whether was able score, well pupillary response cognitive load sample 18 elderly Japanese volunteers with no self-reported impairments. Subjects were randomized receive either real or sham during while recording size, then switched over other treatment group. We found that significantly reduced mean number errors performed at length 7, 8, 9 (-0.83, -0.90, -0.39, respectively compared pre-stimulation values, -0.71, -1.08, -0.79, respectively, stimulation). Additionally, slightly but increased all lengths encoding period task, larger for 7-10 pre-stimulation, 5-10 sham. effect recall period. Our results suggest selectively performance phase Although further are needed better clarify optimal parameters, findings from could support use safe neuromodulation function.

Язык: Английский

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Direct Comparison of EEG Resting State and Task Functional Connectivity Patterns for Predicting Working Memory Performance Using Connectome-Based Predictive Modeling

Brain Connectivity, Год журнала: 2025, Номер unknown

Опубликована: Май 2, 2025

Background: The integration of machine learning with advanced neuroimaging has emerged as a powerful approach for uncovering the relationship between neuronal activity patterns and behavioral traits. While resting-state significantly contributed to understanding neural basis cognition, recent fMRI studies suggest that task-based paradigms may offer superior predictive power cognitive outcomes. However, this hypothesis never been tested using electroencephalography (EEG) data. Methods: We conducted first experimental comparison models built on high-density EEG data recorded during both an auditory working memory task. Multiple processing pipelines were employed ensure robustness reliability. Model performance was evaluated by computing Pearson correlation coefficient predicted observed scores, supplemented mean absolute error root square metrics each model configuration. Results: Consistent prior findings, yielded slightly better modeling than Both conditions demonstrated high accuracy, peak correlations values reaching r = 0.5. Alpha beta band functional connectivity strongest predictors performance, followed theta gamma bands. Additionally, choice parcellation atlas method influenced results, highlighting importance methodological considerations. Conclusion: Our findings support advantage over in predicting aligning with. study underscores critical role frequency-specific choices performance. These insights should guide future designs neuroscience.

Язык: Английский

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Alpha activity during verbal working memory retention depends on the stimulus presentation mode

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2025, Номер unknown

Опубликована: Май 5, 2025

Abstract Previous studies of verbal working memory (WM) have reported inconsistent changes in alpha power during retention, with both increases and decreases observed. We asked whether these discrepancies arise from how stimuli are presented. Thirty adults memorized seven digits presented four modes: Simultaneous (all for 2800 ms) or sequential presentations at Fast (400 ms per digit), Slow (1000 Fast+delay digit plus a 600 free time between). analyzed EEG encoding 6 s retention period theta (4-7 Hz), (8-13 beta (18-24 Hz) frequency bands. Recall accuracy was highest the mode lowest mode, yet two conditions did not differ any band retention. Encoding produced parametric load-related increase decrease, possibly reflecting growing executive control demands motor program formation, respectively. Alpha scale load encoding. During were unaffected by presentation mode. significantly when all modes grouped together compared to simultaneous However, uniquely showed below-baseline first half Our findings suggest that dynamics sensitive temporal structure periods, particularly presence absence intervals between stimulus presentations. propose modulation WM may reflect processes beyond simple gating irrelevant sensory information.

Язык: Английский

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Theta transcranial alternating current stimulation is not effective in improving working memory performance

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2024, Номер unknown

Опубликована: Март 20, 2024

Abstract There is an extensive body of research showing a significant relationship between frontal midline theta activity in the 4-8 Hz range and working memory (WM) performance. Transcranial alternating current stimulation (tACS) recognized for inducing lasting changes brain oscillatory activity. Across two experiments, we tested whether WM could be improved through tACS dorsomedial prefrontal cortex anterior cingulate cortex, by affecting executive control networks associated with theta. In Experiment 1, following either 20-minute verum or sham applied to Fpz-CPz at 1 mA 6 Hz, 31 participants performed tasks, while EEG was recorded. The tasks required mentally manipulate items retain them as they were originally presented. No effects observed behavioral performance, found no change during rest task stimulation. However, alpha retention manipulation information less strongly enhanced delay period compared sham. 2 (N = 25), administered separate sessions. Here, changed order blocks: 25-minute block accompanied first then stimulation, vice versa. Again, improvements after-effects online Taken together, our results demonstrate that frequency not effective method enhancing WM.

Язык: Английский

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