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Related Concept Videos

Working Memory01:24

Working Memory

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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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The content-dependent effect of the N-back task on dual-task performance.

Takehide Kimura1, Ryouta Matsuura2

  • 1Department of Physical Therapy, Faculty of Health Sciences, Tsukuba International University, 6-8-33 Manabe, Tsuchiura, Ibaraki, Japan.

Behavioural Brain Research
|June 1, 2023
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Summary

The N-back cognitive task improved performance on a specific disappearing force-control task, but not others. This suggests a targeted approach for enhancing dual-task abilities using cognitive interventions.

Keywords:
Cognitive taskDorsolateral prefrontal cortexDual-task performanceN-back taskNear-infrared spectroscopyWorking memory

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Area of Science:

  • Cognitive Neuroscience
  • Motor Control
  • Neurorehabilitation

Background:

  • Dual-task interference impairs performance in critical activities like driving and can lead to accidents.
  • Cognitive training, specifically the N-back task, shows potential for improving dual-task performance.
  • Understanding which dual-task combinations benefit from cognitive interventions is crucial for clinical application.

Purpose of the Study:

  • To establish an effective cognitive-task methodology for clinical practice.
  • To identify specific dual-task scenarios where the N-back task enhances performance.
  • To investigate the neurophysiological underpinnings of N-back task-induced improvements in dual-tasking.

Main Methods:

  • Twenty-one healthy adults underwent either an N-back or control task intervention.
  • Participants then performed single- and dual-tasks, including force-control and calculation tasks in disappearing and dexterity conditions.
  • Dorsolateral prefrontal cortex (DLPFC) excitability was measured using near-infrared spectroscopy.

Main Results:

  • The N-back task significantly improved performance in the disappearing force-control task, unlike the control task.
  • No significant differences in performance were observed for other dual-task conditions based on the intervention.
  • The N-back task transiently increased DLPFC excitability, but this did not correlate with performance improvements.

Conclusions:

  • The N-back task may be a viable cognitive intervention for specific dual-task situations, particularly those requiring memory recall under visual occlusion.
  • While N-back training affects DLPFC activity, the direct link to performance enhancement in all dual-tasks requires further investigation.
  • Findings contribute to developing targeted cognitive strategies for improving dual-task performance in clinical settings.