title: Power spectral analysis of heart rate variability in Type As and Type Bs during mental workload.
abstract: Recently several studies have suggested that there are differences in autonomic balance between Type As and Type Bs. This study evaluates a sympathovagal interaction in Type A (n = 8) and Type B (n = 11) male students during a mental arithmetic task by power spectral analysis of heart rate variability. The low-frequency component to high-frequency component ratio was significantly greater in Type As than in Type Bs during a resting period. No significant differences were found in heart rate changes and blood pressure between the two kinds of subject groups. The present findings indicate that there was a significant difference in sympathovagal balance between Type As and Bs. Type As showed dominant sympathetic activity.
authors.affiliation: Department of Ergonomics, University of Occupational and Environmental Health, Kitakyushu, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Kamada
authors.forename: S
authors.initials: S
authors.lastname: Miyake
authors.forename: M
authors.initials: M
authors.lastname: Kumashiro
authors.forename: H
authors.initials: H
authors.lastname: Monou
authors.forename: K
authors.initials: K
authors.lastname: Inoue
mesh_terms: D000328:Adult; D001143:Arousal / Q000502:physiology*; D001288:Attention / Q000502:physiology; D003327:Coronary Disease / Q000503:physiopathology* / Q000517:prevention & control / Q000523:psychology; D004562:Electrocardiography / Q000295:instrumentation; D006339:Heart Rate / Q000502:physiology*; D006801:Humans; D008297:Male; D008991:Monitoring, Physiologic / Q000295:instrumentation*; D011340:Problem Solving / Q000502:physiology; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D014434:Type A Personality; D016526:Workload / Q000523:psychology*