Neurological Sciences and Neurophysiology
Research Article

Impaired Selective Attention Caused By Mental Fatigue

1.

Osaka City University Graduate School of Medicine, Department of Physiology, Osaka, Japonya

2.

Hyogo Children's Sleep and Development Medical Research Center, Hyogo Children's Sleep and Development Medical Research Center, Kobe, Japonya

3.

Panasonic Corporation, Digital & Network Technology Development Center, Kadoma, Japonya

4.

RIKEN, Center for Molecular Imaging Science, Kobe, Japonya

Neurol Sci Neurophysiol 2012; 29: 542-553
Read: 103 Downloads: 9 Published: 03 September 2019

Abstract

Objective: Fatigue decreases efficiency in performing daily tasks, and this is a common symptom in modern society. It would thus be of great value to clarify the mechanism underlying fatigue and to develop efficient methods to evaluate fatigue. We examined cognitive function associated with two types of mental fatigue.

 

Methods: Twenty healthy volunteers were randomised to perform rest or fatigue-inducing mental task session (0-back or 2-back test session) for 30 min in a 3-way crossover design. Just before and after each session, participants completed cognitive task trials to evaluate simple and conflict-controlling selective attention (response inhibition).

 

Results: Changes in the reaction time of simple selective attention task after the 2-back test session were longer and changes after the 0-back test session had a trend toward being longer than those after the rest session. In addition, changes in the percent error for Stroop effect after the 2-back test session were significantly higher than those after the rest session, although those after the 0-back test session were not.

 

Conclusions: Different types of mental fatigue produced different styles of deteriorated cognitive performances. Impaired selective attention may be a specific feature of mental fatigue, and a higher mental load may introduce a greater level of impaired conflict control or response inhibition.

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