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Working Memory

Working Memory

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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Related Experiment Video

Updated: Oct 27, 2025

Transcranial Direct Current Stimulation tDCS for Memory Enhancement

Transcranial Direct Current Stimulation tDCS for Memory Enhancement

Published on: September 18, 2021

Anterior thalamic stimulation improves working memory precision judgments.

Jiali Liu¹, Tao Yu², Jinfeng Wu¹

¹CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China; Department of Psychology, University of Chinese Academy of Sciences, Beijing, China.

Brain Stimulation

|July 20, 2021

Summary

This summary is machine-generated.

Electrical stimulation of the anterior nucleus of thalamus (ANT) enhances working memory precision. This intervention modulates hippocampal gamma activity, highlighting the ANT-hippocampus pathway

Keywords:

Anterior nucleus of thalamus Electrical stimulation Hippocampus Neural oscillations Working memory precision

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Area of Science:

Neuroscience
Cognitive Neuroscience
Human Brain Research

Background:

The anterior nucleus of the thalamus (ANT) is theorized as part of an extended hippocampal system.
The ANT-hippocampus circuit is crucial for memory functions, with disruptions impairing working memory.
The specific role of this circuit in working memory precision is not well understood.

Purpose of the Study:

To investigate the role of the hippocampal-anterior thalamic pathway in working memory precision.
To test the hypothesis that ANT stimulation can enhance working memory precision.

Main Methods:

Intracranial electrical stimulation was applied to the ANT in presurgical epilepsy patients.
A color-recall working memory task was used with simultaneous intracranial EEG recording.
Bipolar electrical stimulation was delivered to ANT electrodes during a subset of task trials.

Main Results:

Working memory precision significantly improved during ANT stimulation compared to non-stimulation trials.
ANT stimulation increased hippocampal gamma oscillations (30-100 Hz) and decreased interictal epileptiform discharges.
Increased gamma power correlated with enhanced working memory precision.

Conclusions:

Direct evidence shows ANT electrical stimulation improves working memory precision in humans.
This stimulation modulates hippocampal gamma activity, implicating the hippocampal-anterior thalamic axis in working memory precision.