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首页> 外文期刊>Indian journal of physiology and pharmacology >Effect of Hyperventilation on Excitability of The Human Cortex and Cardiac Autonomic Variability
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Effect of Hyperventilation on Excitability of The Human Cortex and Cardiac Autonomic Variability

机译：过度通气对人皮层和心脏自主变异性兴奋的影响

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摘要

Hyperventilation (HV) enhances cortical excitability in widely distributed networks including motor, auditory and visual cortices. The depth and frequency of respiration also affects cardiac autonomic nervous system (ANS) activity. The aim of the present study was to evaluate the effect of hyperventilation on cortical excitability and cardiac autonomic activity. The excitability of the human cortex was recorded in terms of visual (VRT) and auditory reaction times (ART). Cardiac ANS activity was recorded and analysed in terms of heart rate variability (HRV) before, during and after hyperventilation, in control and study group. This study involved 50 first MBBS students, who were divided into control group and study group (25 each). Anthropometric characteristics were noted. HRV and auditory and visual reaction times were recorded using polygraph (AD instruments) before, during and after HV for 5 minutes. The results were analysed statistically using SPSS software. ART and VRT were significantly reduced after hyperventilation (p=0.001) as compared to the values before and during HV. There was also alteration in HRV before, during and after HV. Hyperventilation alters the excitability of the human cortex by varying cardiac autonomic activity and hence should be borne in mind during extreme physiological conditions and also certain pathological states.
机译：过度通气（HV）增强了广泛分布式网络中的皮质兴奋，包括电机，听觉和视觉皮质。呼吸的深度和频率也会影响心脏自主神经系统（ANS）活动。本研究的目的是评估高通entilation对皮质兴奋性和心脏自主主义活动的影响。在视觉（VRT）和听觉反应时间（ART）方面记录了人皮层的兴奋性。在对照和研究组中，在过度通气率之前，期间和后，期间和后，在心率变异性（HRV）方面记录和分析了心脏ANS活性。本研究涉及50名MBBS学生，他们分为对照组和研究组（每组25个）。注意到人体测量特征。在HV之前，期间和之后的测谎仪（广告仪器）记录HRV和听觉和视觉反应时间5分钟。使用SPSS软件统计分析结果。与HV之前和期间的值相比，过度换气（P = 0.001）后，艺术和VRT显着降低。 HV之前，HV之前还有HRV还改变。通过不同的心脏自主主义活动改变了人皮层的兴奋性，因此应该在极端生理条件下牢记和某些病理状态。

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