Research Group on Health Psychology, Department of Psychology, University of Leuven, Leuven, Belgium.
Psychophysiology. 2011 Jan;48(1):117-20. doi: 10.1111/j.1469-8986.2010.01043.x.
Spontaneous breathing consists of substantial correlated variability: Parameters characterizing a breath are correlated with parameters characterizing previous and future breaths. On the basis of dynamic system theory, negative emotion states are predicted to reduce correlated variability whereas sustained attention is expected to reduce total respiratory variability. Both are predicted to evoke sighing. To test this, respiratory variability and sighing were assessed during a baseline, stressful mental arithmetic task, nonstressful sustained attention task, and recovery in between tasks. For respiration rate (excluding sighs), reduced total variability was found during the attention task, whereas correlated variation was reduced during mental load. Sigh rate increased during mental load and during recovery from the attention task. It is concluded that mental load and task-related attention show specific patterns in respiratory variability and sigh rate.
表征一次呼吸的参数与表征先前和未来呼吸的参数相关。基于动态系统理论，负性情绪状态预计会降低相关可变性，而持续注意预计会降低总呼吸可变性。这两者都预计会引起叹息。为了验证这一点，在基线、有压力的心算任务、无压力的持续注意任务以及任务之间的恢复期间，评估了呼吸可变性和叹息。对于呼吸频率（不包括叹息），在注意任务期间发现总变异性降低，而在精神负荷期间相关变化降低。在精神负荷期间和从注意任务恢复期间，叹息率增加。因此得出结论，精神负荷和与任务相关的注意力在呼吸可变性和叹息率方面表现出特定的模式。
