Роль Бета- И Гамма-Ритмов В Реализации Функций Рабочей Памяти

Background: The effects of transcranial direct current stimulation (tDCS) at the pFC are often investigated using cognitive paradigms, particularly working memory tasks. However, the neural basis for the neuromodulatory cognitive effects of tDCS, including which subprocesses are affected by stimulation, is not completely understood. Aims: We investigated the effects of tDCS on working memory task-related spectral activity during and after tDCS to gain better insights into the neurophysiological changes associated with stimulation. Methods: We reanalyzed data from 100 healthy participants grouped by allocation to receive either sham (0 mA, 0.016 mA, and 0.034 mA) or active (1 mA or 2 mA) stimulation during a 3-back task. EEG data were used to analyze event-related spectral power in frequency bands associated with working memory performance. Results: Frontal theta event-related synchronization (ERS) was significantly reduced post-tDCS in the active group. Participants receiving active tDCS had slower RTs following tDCS compared with sham, suggesting interference with practice effects associated with task repetition. Theta ERS was not significantly correlated with RTs or accuracy. Conclusions: tDCS reduced frontal theta ERS poststimulation, suggesting a selective disruption to working memory cognitive control and maintenance processes. These findings suggest that tDCS selectively affects specific subprocesses during working memory, which may explain heterogenous behavioral effects.

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Transcranial Direct Current Stimulation Modulates Working Memory Maintenance Processes in Healthy Individuals

Nikolin

Martin

Loo

et al. 2023

Journal of Cognitive Neuroscience

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Prosody of the Addressing in French Political Speech

BUBNOVA,

GLADKIKH

2024

Moscow University Bulletin. Series 19. Linguistics and Intercultural Communication

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Political speech (hereinafter PS) is a monological public speech of a political figure, which relies on a written text, the informative component of which is created at the lexico-grammatical level by the speechwriter, and the task of the politician is to ensure that the information is adequately understood by the listening audience. One way of doing this is to reduce the distance between the speaker and the audience. To achieve this “understanding”, the speaker uses the opportunities provided by the oral channel of communication both at the verbal level - the means of phonetic expression that create the prosody of the address - and at the non-verbal level - from body posture to gestures and eye expressions. In linguistics and psycholinguistics the synergetic interaction between prosody and kinesics is increasingly discussed today. How is this interaction realised in PS and what is its effectiveness? Is it possible to consider the realised PS as a multimodal speech utterance? In order to answer these questions this article examines the current approaches to the study of French PS presented in corpus linguistics [Goldman et al., 2009; Simon et al., 2010, 2013] and interdisciplinary linguistics [Kibrik, 2018; Guaïtella, 2014] and discusses the relevance of their results to describe the prosody of address as a strategic component of PS.

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Роль Бета- И Гамма-Ритмов В Реализации Функций Рабочей Памяти

Cited by 2 publications

References 18 publications

Transcranial Direct Current Stimulation Modulates Working Memory Maintenance Processes in Healthy Individuals

Transcranial Direct Current Stimulation Modulates Working Memory Maintenance Processes in Healthy Individuals

Prosody of the Addressing in French Political Speech

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