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[Heart rhythm indices during human solving of arithmetic tasks]
Zhurnal Vysshei Nervnoi Deiatelnosti Imeni I P Pavlova
|November 1, 1994
Summary
High anxiety in adolescents is linked to reduced heart rate variability during cognitive tasks, while low anxiety shows increased variability. This suggests distinct physiological responses to informational load based on anxiety levels.
Area of Science:
- Psychophysiology
- Cognitive Psychology
Background:
- Heart rate variability (HRV) is a key indicator of autonomic nervous system function.
- Anxiety and cognitive load can significantly impact physiological responses.
Purpose of the Study:
- To investigate the relationship between anxiety levels and heart rate modulation under informational load.
- To analyze spectral characteristics of heart rate variability in relation to anxiety.
Main Methods:
- Recording heart rate and respiration in 90 adolescents (17-19 years) during rest and cognitive tasks.
- Performing off-line spectral analysis of RR-intervals.
- Assessing anxiety using Spilberger's scale and excitation-inhibition using Strelau's scale.
Main Results:
- Overall heart rate increased significantly, but RR-interval variability remained unchanged in the group.
- Two subgroups emerged: decreased RR-interval variability in high-anxiety individuals and increased variability in low-anxiety individuals.
- High-anxiety subgroup showed decreased power across all frequency bands; low-anxiety subgroup showed increased low-frequency modulation.
Conclusions:
- Anxiety levels differentiate heart rate modulation patterns under informational load.
- Physiological responses to cognitive stress vary significantly between high and low anxiety groups.
- Fatigue may contribute to observed heart rate modulation patterns.