AI Article Synopsis
- Theta-gamma coupling (TGC) is important for working memory (WM) and its performance is linked to neurophysiological measures like theta and alpha synchronization.
- A study involving 62 older participants (60+) examined how changes in WM performance over 6 to 12 weeks correlate with TGC, theta, and alpha event-related synchronization/desynchronization using EEG during an N-back task.
- Findings revealed a consistent relationship between WM performance and TGC over time in older individuals, whereas the associations with theta and alpha measures varied, particularly showing stability in the control group but not in those with remitted Major Depressive Disorder.
Article Abstract
Theta-gamma coupling (TGC) is a neurophysiologic mechanism that supports working memory (WM). TGC is associated with N-back performance, a WM task. Similar to TGC, theta and alpha event-related synchronization (ERS) and desynchronization (ERD) are also associated with WM. Few studies have examined the longitudinal relationship between WM performance and TGC, ERS, or ERD. This study aimed to determine if changes in WM performance are associated with changes in TGC (primary aim), as well as theta and alpha ERS or ERD over 6 to 12 weeks. Participants included 62 individuals aged 60 and older with no neuropsychiatric conditions or with remitted Major Depressive Disorder (MDD) and no cognitive disorders. TGC, ERS, and ERD were assessed using electroencephalography (EEG) during the N-back task (3-back condition). There was an association between changes in 3-back performance and changes in TGC, alpha ERD and ERS, and theta ERS in the control group. In contrast, there was only a significant association between changes in 3-back performance and changes in TGC in the subgroup with remitted MDD. Our results suggest that the relationship between WM performance and TGC is stable over time, while this is not the case for changes in theta and alpha ERS and ERD.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9016289 | PMC |
| http://dx.doi.org/10.1093/cercor/bhab295 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Improved motor imagery skills after repetitive passive somatosensory stimulation: a parallel-group, pre-registered study.
Front Neural Circuits
January 2025
Department of Biosciences and Informatics, Faculty of Science and Technology, Keio University, Kanagawa, Japan.
Introduction: Motor-imagery-based Brain-Machine Interface (MI-BMI) has been established as an effective treatment for post-stroke hemiplegia. However, the need for long-term intervention can represent a significant burden on patients. Here, we demonstrate that motor imagery (MI) instructions for BMI training, when supplemented with somatosensory stimulation in addition to conventional verbal instructions, can help enhance MI capabilities of healthy participants.
View Article and Find Full Text PDFMotor and parietal cortex activity responses to mirror visual feedback in patients with subacute stroke: An EEG study.
Clin Neurophysiol Pract
December 2024
Department of Rehabilitation Medicine, Shanghai Jing'an District Central Hospital, Shanghai, China.
Objective: To elucidate the immediate electrophysiological effects of mirror visual feedback (MVF) combined with or without touch task in subacute stroke.
Methods: Subacute stroke patients and healthy controls were recruited to participate in four grasping tasks (MVF or no MVF, combined with rubber ball or no ball) under electroencephalogram (EEG) monitoring. Event-related desynchronization (ERD) /event-related synchronization (ERS) and the lateralization index (LI) were utilized to observe the electrophysiological effects.
Dissociating the roles of alpha oscillation sub-bands in visual working memory.
Neuroimage
January 2025
Institute of Brain and Psychological Sciences, Sichuan Normal University, 610066, Sichuan, China; Brain and Cognitive Neuroscience Research Center, Liaoning Normal University, 116029, Liaoning, China. Electronic address:
Alpha oscillations play a critical role in visual working memory (VWM), but the specific contributions of lower and upper alpha sub-bands remain unclear. To address this, we employed a whole-field change detection paradigm to investigate how alpha power modulation and decoding accuracy differ between these sub-bands in response to varying set sizes and spatial extents of memory arrays. Our results revealed that lower alpha (8-9 Hz) exhibits widespread event-related desynchronization (ERD) during the early maintenance phase, which increases with set size and reflects attentional allocation to individual memory items.
View Article and Find Full Text PDFEffects of intermittent visual feedback on EEG characteristics during motor preparation and execution in a goal-directed task.
Front Hum Neurosci
December 2024
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang, China.
Introduction: Visual feedback plays a crucial role in goal-directed tasks, facilitating movement preparation and execution by allowing individuals to adjust and optimize their movements. Enhanced movement preparation and execution help to increase neural activity in the brain. However, our understanding of the neurophysiological mechanisms underlying different types of visual feedback during task preparation and execution remains limited.
View Article and Find Full Text PDFUnraveling EEG correlates of unimanual finger movements: insights from non-repetitive flexion and extension tasks.
J Neuroeng Rehabil
December 2024
Laboratory for Neuro- & Psychophysiology, Department of Neurosciences, KU Leuven, Leuven, Belgium.
Background: The loss of finger control in individuals with neuromuscular disorders significantly impacts their quality of life. Electroencephalography (EEG)-based brain-computer interfaces that actuate neuroprostheses directly via decoded motor intentions can help restore lost finger mobility. However, the extent to which finger movements exhibit distinct and decodable EEG correlates remains unresolved.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!