Effects of mental tasks on the cardiorespiratory synchronization

The cardiovascular and respiratory systems are functionally related to each other, but it is unclear if the cerebral cortex can affect their interaction. The effect of a mental task on the synchronization between cardiovascular and respiratory systems was investigated in the article. Electroencephalogram (EEG), electrocardiogram (ECG) and respiratory signal (RES) were collected from 29 healthy male subjects during the mental arithmetic (MA) task and the synchrogram was used to estimate the strength of cardiorespiratory synchronization. Our results showed that MA task significantly increased the breath rate, the heart rate and the EEG power spectral energy in theta band at FC3, FC4 and C4 electrodes (p<0.01), decreased the duration of cardiorespiratory synchronization epochs (p<0.05). Moreover the duration of cardiorespiratory synchronization epochs during MA task was negatively correlated with the EEG power spectral energy in theta band at FC3, FC4 and C4 electrodes and the sympathetic activity (p<0.05). The results demonstrated that ANS and cerebral cortex are implicated in the changes of cardiorespiratory synchronization during MA task.

[1]  P. Sleight,et al.  Effects of controlled breathing, mental activity and mental stress with or without verbalization on heart rate variability. , 2000, Journal of the American College of Cardiology.

[2]  Silke Lange,et al.  A quantitative comparison of different methods to detect cardiorespiratory coordination during night-time sleep , 2004, Biomedical engineering online.

[3]  Aneta Stefanovska,et al.  The effect of low-frequency oscillations on cardio-respiratory synchronization , 2008 .

[4]  U. Zwiener,et al.  Estimation of nonlinear couplings on the basis of complexity and predictability-a new method applied to cardiorespiratory coordination , 1998, IEEE Transactions on Biomedical Engineering.

[5]  M. Rosenblum,et al.  Identification of coupling direction: application to cardiorespiratory interaction. , 2002, Physical review. E, Statistical, nonlinear, and soft matter physics.

[6]  H. Critchley,et al.  Cerebral correlates of autonomic cardiovascular arousal: a functional neuroimaging investigation in humans , 2000, The Journal of physiology.

[7]  H. Critchley,et al.  A cortical potential reflecting cardiac function , 2007, Proceedings of the National Academy of Sciences.

[8]  Eran Toledo,et al.  Cardiorespiratory synchronization: is it a real phenomenon? , 1999, Computers in Cardiology 1999. Vol.26 (Cat. No.99CH37004).

[9]  J. Kurths,et al.  Heartbeat synchronized with ventilation , 1998, Nature.

[10]  Jürgen Kurths,et al.  Detection of n:m Phase Locking from Noisy Data: Application to Magnetoencephalography , 1998 .

[11]  Peter Van Leeuwen,et al.  Comparison of two different approaches in the detection of intermittent cardiorespiratory coordination during night sleep , 2002, BMC Physiology.

[12]  D. Paterson,et al.  Identification of higher brain centres that may encode the cardiorespiratory response to exercise in humans , 2001, The Journal of physiology.

[13]  Aneta Stefanovska,et al.  Synchronization and modulation in the human cardiorespiratory system , 2000 .

[14]  P. Stein,et al.  Heart rate variability: a measure of cardiac autonomic tone. , 1994, American heart journal.

[15]  M. Paluš,et al.  Interactions between cardiac, respiratory and EEG‐δ oscillations in rats during anaesthesia , 2007 .

[16]  A Stefanovska,et al.  The cardiovascular system as coupled oscillators? , 2001, Physiological measurement.

[17]  D. Cysarz,et al.  Cardiorespiratory synchronization during Zen meditation , 2005, European Journal of Applied Physiology.

[18]  Michela Masè,et al.  Cardiorespiratory interactions in patients with atrial flutter. , 2009, Journal of applied physiology.

[19]  Chong Zhang,et al.  Relationship between scalp potential and autonomic nervous activity during a mental arithmetic task , 2009, Autonomic Neuroscience.

[20]  Richard S. J. Frackowiak,et al.  Neural correlates of voluntary breathing in humans. , 2003, Journal of applied physiology.

[21]  H H Abel,et al.  Synchronization in the human cardiorespiratory system. , 1998, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics.

[22]  S Akselrod,et al.  Does synchronization reflect a true interaction in the cardiorespiratory system? , 2002, Medical engineering & physics.

[23]  H. Lackner,et al.  Oscillations of heart rate and respiration synchronize during poetry recitation. , 2004, American journal of physiology. Heart and circulatory physiology.

[24]  S. Havlin,et al.  Experimental evidence for phase synchronization transitions in the human cardiorespiratory system. , 2007, Physical review letters.