Frontal-posterior coherence and cognitive function in older adults

Fleck, Jessica I.; Kuti, Julia; Brown, Jessica E.; Mahon, Jessica R.; Gayda-Chelder, Christine A.

doi:10.1016/j.ijpsycho.2016.07.501

Cited by 32 publications

(41 citation statements)

References 73 publications

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“…In this study, we found that the strengthened theta connectivity was closely related to the EC network while performing the ANT. This finding is consistent with the belief that the theta synchronization activities in prefrontal cortices emerged during goal_ directed behavior tests [51][52][53][54]. Thus, decreased FC in theta band may contribute to the EC deficits in TLE patients.…”

Section: Discussionsupporting

confidence: 90%

Functional brain network mechanism of executive control dysfunction in temporal lobe epilepsy

Ren

Pan

et al. 2020

BMC Neurol

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Background: Executive control dysfunction is observed in a sizable number of patients with temporal lobe epilepsy (TLE). Neural oscillations in the theta band are increasingly recognized as having a crucial role in executive control network. The purpose of this study was to investigate the alterations in the theta band in executive control network and explore the functional brain network mechanisms of executive control dysfunction in TLE patients.Methods: A total of 20 TLE patients and 20 matched healthy controls (HCs) were recruited in the present study. All participants were trained to perform the executive control task by attention network test while the scalp electroencephalogram (EEG) data were recorded. The resting state signals were collected from the EEG in the subjects with quiet and closed eyes conditions. Functional connectivity among EEGs in the executive control network and resting state network were respectively calculated. Results:We found the significant executive control impairment in the TLE group. Compared to the HCs, the TLE group showed significantly weaker functional connectivity among EEGs in the executive control network. Moreover, in the TLE group, we found that the functional connectivity was significantly positively correlated with accuracy and negatively correlated with EC_effect. In addition, the functional connectivity of the executive control network was significantly higher than that of the resting state network in the HCs. In the TLE group, however, there was no significant change in functional connectivity strengths between the executive control network and resting state network. Conclusion:Our results indicate that the decreased functional connectivity in theta band may provide a potential mechanism for executive control deficits in TLE patients.

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Section: Discussionsupporting

confidence: 90%

Functional brain network mechanism of executive control dysfunction in temporal lobe epilepsy

Ren

Pan

et al. 2020

BMC Neurol

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“…This aspect was relevant in previous studies demonstrating: coherent oscillations (delta-band), linking frontal, and posterior regions during decision making, [25] ; theta coherence between frontal and occipital regions during a working memory task [26] ; and coherence (delta and theta bands) within the frontal region of older adults, related to the memory and executive functions. [27] By such observations, an increase of coherence resulting from MISR is emphasized as a potential approach to modulate coherence in cortical networks with emphasis on frontal regions. In fact, previously we showed that the addition of noise improves motor tasks via an internal SR mechanism associated with a boosting of cortico-muscular coherence.…”

Section: Discussionmentioning

confidence: 99%

Augmenting EEG-global-coherence with auditory and visual noise

et al. 2018

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The present investigation documents the electrophysiological occurrence of multisensory internal stochastic resonance (MISR) in the human electroencephalographic (EEG) coherence elicited by auditory and visual noise.We define MISR of EEG coherence as the phenomenon for which an intermediate level of input noise of a sensory modality enhances EEG coherence in response to another noisy sensory modality. Here, EEG coherence is computed by the global weighted coherence (GWC), modulated by quasi-Brownian noise. Specifically, we examined whether a particular level of auditory noise together with constant visual noise (experimental condition 1) and a specified level of visual noise together with constant auditory noise (experimental condition 2), improves EEG's GWC. We compared GWC between ongoing EEG basal activity (BA), zero noise (ZN), optimal noise (ON), and high noise (HN).The data disclosed an intermediate level of input noise that enhances the GWC for the majority of the subjects, thus demonstrating for the first time the occurrence of multisensory internal stochastic resonance (SR) in visuoauditory processing within the central nervous system.

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“…The association between brain connectivity and cognitive function (e.g., Sala-Llonch et al, 2015 ; Fleck et al, 2016 ; Vecchio et al, 2016 ), as well as the influence of CR on task-related brain activity and cognition (e.g., Scarmeas et al, 2004 ; Bosch et al, 2010 ), suggests that CR may influence functional connectivity in the brain at rest. In the present research, we used electroencephalography (EEG) to explore differences stemming from age and CR in resting-state coherence in adults ages 45–64 years.…”

Section: Introductionmentioning

confidence: 99%

The Impact of Age and Cognitive Reserve on Resting-State Brain Connectivity

Fleck

Kuti

Mercurio

et al. 2017

Front. Aging Neurosci.

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Cognitive reserve (CR) is a protective mechanism that supports sustained cognitive function following damage to the physical brain associated with age, injury, or disease. The goal of the research was to identify relationships between age, CR, and brain connectivity. A sample of 90 cognitively normal adults, ages 45–64 years, had their resting-state brain activity recorded with electroencephalography (EEG) and completed a series of memory and executive function assessments. CR was estimated using years of education and verbal IQ scores. Participants were divided into younger and older age groups and low- and high-CR groups. We observed greater left- than right-hemisphere coherence in younger participants, and greater right- than left-hemisphere coherence in older participants. In addition, greater coherence was observed under eyes-closed than eyes-open recording conditions for both low-CR and high-CR participants, with a more substantial difference between recording conditions in individuals high in CR regardless of age. Finally, younger participants low in CR exhibited greater mean coherence than younger participants high in CR, whereas the opposite pattern was observed in older participants, with greater coherence in older participants high in CR. Together, these findings suggest the possibility of a shift in the relationship between CR and brain connectivity during aging.

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Frontal-posterior coherence and cognitive function in older adults

Cited by 32 publications

References 73 publications

Functional brain network mechanism of executive control dysfunction in temporal lobe epilepsy

Functional brain network mechanism of executive control dysfunction in temporal lobe epilepsy

Augmenting EEG-global-coherence with auditory and visual noise

The Impact of Age and Cognitive Reserve on Resting-State Brain Connectivity

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