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Table 1 Measurements before and after the fatigue-inducing mental task sessions

From: Effect of mental fatigue on the central nervous system: an electroencephalography study

 

0-back test

2-back test

 

Before

After

Before

After

VAS for fatigue

    

General fatigue

15.8 ± 11.2

53.2 ± 24.2a

14.5 ± 10.4

47.8 ± 23.0a

Mental fatigue

15.2 ± 9.9

50.9 ± 27.5a

13.2 ± 10.0

47.0 ± 26.0a

Cognitive tasks

    

Error rate of Task 1

2.4 ± 1.9

3.4 ± 3.3

2.6 ± 2.1

3.7 ± 3.7

Error rate of Task 2

4.4 ± 3.3

6.8 ± 4.9a

5.1 ± 4.0

7.1 ± 5.2a

ECG

    

LF/HF

2.8 ± 5.2

3.7 ± 2.4

1.7 ± 1.0

4.2 ± 3.8b

%LF (%)

32.3 ± 16.7

43.2 ± 17.8

34.8 ± 14.9

40.0 ± 23.2

%HF (%)

32.0 ± 25.0

18.3 ± 13.6b

26.2 ± 14.1

18.2 ± 17.2

Saliva cortisol (nmol/l)

9.4 ± 4.5

9.4 ± 4.5

8.7 ± 3.3

7.2 ± 3.3

  1. Data are presented as mean ± SD.
  2. VAS, visual analogue scale; LF, low-frequency power; HF high-frequencypower.
  3. aP < 0.01,bP < 0.05, significantly different from thecorresponding values before the fatigue-inducing mental task sessions (pairedt-test).
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Behavioral and Brain Functions

ISSN: 1744-9081

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