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Related Concept Videos

Working Memory01:24

Working Memory

214
Working memory refers to a combination of components, including short-term memory and attention, that allow an individual to hold information temporarily as we perform cognitive tasks. It is an essential cognitive function that enables the execution of complex tasks such as problem-solving, comprehension, and reasoning. Unlike short-term memory, which simply involves the storage of information for a brief period, working memory involves the active manipulation and processing of this...
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Association Areas of the Cortex01:21

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Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
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Related Experiment Video

Updated: Jul 16, 2025

Extracting Visual Evoked Potentials from EEG Data Recorded During fMRI-guided Transcranial Magnetic Stimulation
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Brain-wide human oscillatory LFP activity during visual working memory.

Balbir Singh1, Zhengyang Wang2, Leen M Madiah1

  • 1Department of Biomedical Engineering, Vanderbilt University.

Biorxiv : the Preprint Server for Biology
|September 21, 2023
PubMed
Summary
This summary is machine-generated.

Brain oscillations, including gamma power, are key to visual working memory. Different brain regions show unique oscillatory patterns during memory tasks, revealing a widespread neural network.

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LFPintracranial recordingsworking memory

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Electrophysiology

Background:

  • Oscillatory brain activity is linked to cognitive functions, but its precise role in working memory remains unclear.
  • Understanding the brain-wide distribution of these oscillations during working memory tasks is crucial.

Approach:

  • Recorded local field potentials (LFPs) from 12 adults using intracranial depth electrodes during visual-spatial and shape-matching memory tasks.
  • Analyzed LFP power across various frequency bands (e.g., gamma, beta) during stimulus presentation and working memory maintenance.
  • Investigated task-related oscillatory activity in cortical and subcortical brain regions.

Key Points:

  • Stimulus presentation increased broadband LFP power across extensive brain networks, including occipital, parietal, temporal, insular, and prefrontal cortices, as well as the amygdala and hippocampus.
  • Gamma power (especially high gamma in occipital cortex) was prominent during the working memory delay interval.
  • Beta frequency power decreased post-stimulus, with region-specific variations.

Conclusions:

  • Visual working memory involves a distributed network with distinct oscillatory signatures in different brain areas.
  • Gamma oscillations play a significant role in maintaining information during working memory.
  • Region-specific oscillatory patterns provide insights into the neural mechanisms of visual working memory.