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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 information.

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The hippocampus, a critical brain structure, plays an essential role in memory processing, particularly in the formation and retrieval of memory. This small, seahorse-shaped region is located within the medial temporal lobe, with one hippocampus in each brain hemisphere. Experimental studies involving lesions in the hippocampi of rats have demonstrated significant impairments in tasks such as object recognition and maze navigation, indicating the hippocampus involvement in both recognition and...

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Related Experiment Video

Updated: Jun 5, 2026

Assessing Working Memory in Children: The Comprehensive Assessment Battery for Children – Working Memory (CABC-WM)

Assessing Working Memory in Children: The Comprehensive Assessment Battery for Children – Working Memory (CABC-WM)

Published on: June 12, 2017

Complex span tasks and hippocampal recruitment during working memory.

Carlos Cesar Faraco¹, Nash Unsworth, Jason Langley

¹Biomedical Health Sciences Institute, Division of Neuroscience, University of Georgia, Athens, GA 30602, USA. cfaraco@uga.edu

|December 25, 2010

Summary

This summary is machine-generated.

This study reveals that complex working memory (WM) tasks recruit the hippocampus, a brain region typically linked to long-term memory (LTM). This suggests LTM involvement in WM processes.

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Area of Science:

Cognitive Neuroscience
Neuroimaging

Background:

Working memory (WM) is crucial for attention-dependent tasks.
The interaction between WM and long-term memory (LTM) remains a significant debate in cognitive neuroscience.

Purpose of the Study:

To investigate whether complex WM tasks, specifically the operation span (OSPAN) task, engage medial temporal regions associated with LTM differently than traditional WM tasks.
To examine the neural mechanisms underlying WM encoding and maintenance during complex span tasks using fMRI.

Main Methods:

Functional magnetic resonance imaging (fMRI) was employed to scan participants.
Participants performed two tasks: the operation span (OSPAN) task and a control arithmetic task.
Brain activity was analyzed during WM encoding and maintenance phases.

Main Results:

Both OSPAN and arithmetic tasks activated canonical WM regions.
Significant bilateral hippocampal activation was observed, indicating its recruitment in WM encoding and maintenance.
The right posterior hippocampus showed greater activation during OSPAN compared to the arithmetic task.
Time-course analysis of recall activity suggested LTM involvement during complex WM span performance.

Conclusions:

Complex WM tasks, like OSPAN, engage the hippocampus, a region traditionally associated with LTM.
Evidence suggests a potential specialization of hippocampal function, with bilateral posterior regions involved in WM and left-hemisphere involvement for WM performance.
These findings challenge traditional views by indicating LTM system recruitment during demanding WM tasks.