AI Article Synopsis
- Alpha-band rhythm plays a role in memory processes and shows significant suppression during memory recall tasks, as observed in a study with ten healthy participants.
- The suppression of this rhythm was localized primarily in the occipital lobe, indicating involvement of the occipital attentional network during memory recall.
- There is a direct correlation between the amplitude of the alpha-band rhythm and recall accuracy, suggesting that measuring this rhythm could serve as an indicator of memory performance.
Article Abstract
Alpha-band rhythm is thought to be involved in memory processes, similarly to other spontaneous brain rhythms. Ten right-handed healthy volunteers participated in our proposed sequential short-term memory task that provides a serial position effect in accuracy rate. We recorded alpha-band rhythms by magnetoencephalography during performance of the task and observed that the amplitude of the rhythm was suppressed dramatically in the memory recall period. The suppressed region was estimated to be in the occipital lobe, suggesting that alpha-band rhythm is suppressed by activation of the occipital attentional network. Additionally, the alpha-band suppression reflected accuracy rate, that is, the amplitude was suppressed more when recalling items with higher accuracy rate. The sensors with a significant correlation between alpha-band amplitude and accuracy rate were located widely from the frontal to occipital regions mainly in the right hemisphere. The results suggests that alpha-band rhythm is involved in memory recall and can be index of memory performance.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1109/EMBC.2016.7591737 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Oscillatory traveling waves provide evidence for predictive coding abnormalities in schizophrenia.
Biol Psychiatry
November 2024
Laboratory of Psychophysics, Brain Mind Institute, School of Life Sciences, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, (Switzerland). Electronic address:
Background: The computational mechanisms underlying psychiatric disorders are hotly debated. One hypothesis, grounded in the Bayesian predictive coding framework, proposes that schizophrenia patients have abnormalities in encoding prior beliefs about the environment, resulting in abnormal sensory inference, which can explain core aspects of the psychopathology, such as some of its symptoms.
Methods: Here, we tested this hypothesis by identifying oscillatory traveling waves as neural signatures of predictive coding.
Peak alpha frequency is linked to visual temporal attention in 6-month-olds.
Sci Rep
November 2024
Department of Developmental and Educational Psychology, University of Vienna, Wien, Austria.
The temporal resolution of adults' visual attention has been linked to the frequency of alpha-band oscillations in electroencephalogram (EEG) signal, with higher Peak Alpha Frequency (PAF) being associated with better visual temporal processing skills. However, relatively less is known about neural mechanisms underlying individual differences in the temporal resolution of visual attention in infancy. This study investigated the role of PAF in visual temporal processing in early infancy.
View Article and Find Full Text PDFLocal and interareal alpha and low-beta band oscillation dynamics underlie the bilateral field advantage in visual working memory.
Cereb Cortex
November 2024
Neuroscience Center, Helsinki Institute of Life Science, University of Helsinki, P.O. Box 3 (Fabianinkatu 33), FI-00014 Helsinki, Finland.
Visual working memory has a limited maximum capacity, which can be larger if stimuli are presented bilaterally vs. unilaterally. However, the neuronal mechanisms underlying this bilateral field advantage are not known.
View Article and Find Full Text PDFAbnormalities in the absolute power of Delta and Alpha rhythms in the frontal lobe of patients suffering from psychosomatic disorders.
Psychiatr Pol
August 2024
Uniwersytet Mikołaja Kopernika w Toruniu, Wydział Filozofii i Nauk Społecznych, Instytut Psychologii, Katedra Psychologii Klinicznej i Neuropsychologii.
Objectives: Psychosomatic disorders (somatic symptom disorder - SSD) constitute a heterogeneous group of medical conditions characterized by somatic symptoms without explained somatic causes. Due to the complexity of symptoms, they present a significant medical, social and economic challenge, and diagnosing and treating these disorders remains a substantial clinical challenge. The aim of the conducted research was an attempt to identify characteristic patterns in the surface-level brain bioelectrical activity of individuals experiencing psychosomatic disorders.
View Article and Find Full Text PDFAlpha Traveling Waves during Working Memory: Disentangling Bottom-Up Gating and Top-Down Gain Control.
J Neurosci
December 2024
Cerco, CNRS Université de Toulouse, Toulouse 31059, France
While previous works established the inhibitory role of alpha oscillations during working memory maintenance, it remains an open question whether such an inhibitory control is a top-down process. Here, we attempted to disentangle this issue by considering the spatiotemporal component of waves in the alpha band, i.e.
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!