Why the study?
Do mental tests of different intensity alter interbeat interval, peripheral blood flow, and respiration waveform in human subjects?
Do mental tests of different intensity alter interbeat interval, peripheral blood flow, and respiration waveform in human subjects?
Mental tasks induce acute physiological stress responses, characterized by increased heart rate and respiration frequency, and decreased heart rate variability.
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Mental tasks may induce acute autonomic shifts; leaves open whether monitoring or mitigation is warranted in practice.
The interbeat interval, peripheral blood flow and respiration waveform of 14 subjects were measured during three mental tests of different intensity and during 10 min recovery time after each test. The signals were analysed using a general statistical package and a spectrum analysis procedure. It was shown that the respiration frequency component moved to a higher frequency during mental tests and returned to its original frequency during the recovery periods. The mean heart rate increased by 15% during the tasks and the heart rate variability decreased.
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Hitchen et al. (1980) studied this question.
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