caa a22 4500 477096581 CHVBK 20180405111529.0 cr unu---uuuuu 170330e19960601xx s 000 0 eng 10.1007/BF02284692 doi (NATIONALLICENCE)springer-10.1007/BF02284692 Cardiac rhythm effects of .125-Hz paced breathing through a resistive load: Implications for paced breathing therapy and the polyvagal theory [Elektronische Daten] [Deepa Sargunaraj, Paul Lehrer, Stuart Hochron, Lawrence Rausch, Robert Edelberg, Stephen Porges] This study examined the psychophysiological effects of slow-paced breathing while subjects breathed through external respiratory resistive loads. Twenty-four normal volunteers completed four 5-min trials of paced breathing (.125 Hz) through an inspiratory resistive wire mesh screen (0 to 25 cm H2O/L/s). Each trial was followed by a 5-min rest trial. There was evidence for hyperventilation and/or fatigue during paced breathing. Also, respiratory sinus arrhythmia (RSA) was elevated in the first minute of paced breathing, and then declined toward baseline. Heart period decreased during paced breathing trials, and fell significantly below baseline during rest periods. These data suggest decreased vagus nerve activity and/or sympathetic activation, following an initial increase in parasympathetic activity during paced breathing. They are not consistent with the use of .125-Hz paced breathing as a relaxation technique, particularly during respiratory resistive stress. Finally, although RSA and average heart period changed synchronouslywithin paced breathing and rest conditions, they diverged incomparisons between pacing and rest. This dissociation suggests that different mechanisms mediate these two cardiac parameters. These data are consistent with Porges' theory that vagal influences on tonic heart rate are mediated by the combined effect of vagal projections from both the nucleus ambiguus and the dorsal motor nucleus, while RSA is mediated only through the nucleus ambiguus alone. Plenum Publishing Corporation, 1996 paced breathing nationallicence respiratory sinus arrhythmia nationallicence vagal tone nationallicence flow-resistive breathing nationallicence homeostasis nationallicence parasympathetic system nationallicence Sargunaraj Deepa Department of Psychiatry, UMDNJ-Robert W. Johnson Medical School, 671 Hoes Lane, 08854, Piscataway, New Jersey aut Lehrer Paul Department of Psychiatry, UMDNJ-Robert W. Johnson Medical School, 671 Hoes Lane, 08854, Piscataway, New Jersey aut Hochron Stuart Department of Psychiatry, UMDNJ-Robert W. Johnson Medical School, 671 Hoes Lane, 08854, Piscataway, New Jersey aut Rausch Lawrence Department of Psychiatry, UMDNJ-Robert W. Johnson Medical School, 671 Hoes Lane, 08854, Piscataway, New Jersey aut Edelberg Robert Department of Psychiatry, UMDNJ-Robert W. Johnson Medical School, 671 Hoes Lane, 08854, Piscataway, New Jersey aut Porges Stephen University of Maryland, USA aut Biofeedback and Self-regulation Kluwer Academic Publishers-Plenum Publishers 21/2(1996-06-01), 131-147 0363-3586 21:2<131 1996 21 10484 https://doi.org/10.1007/BF02284692 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02284692 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sargunaraj Deepa Department of Psychiatry, UMDNJ-Robert W. Johnson Medical School, 671 Hoes Lane, 08854, Piscataway, New Jersey aut NATIONALLICENCE 700 1- Lehrer Paul Department of Psychiatry, UMDNJ-Robert W. Johnson Medical School, 671 Hoes Lane, 08854, Piscataway, New Jersey aut NATIONALLICENCE 700 1- Hochron Stuart Department of Psychiatry, UMDNJ-Robert W. Johnson Medical School, 671 Hoes Lane, 08854, Piscataway, New Jersey aut NATIONALLICENCE 700 1- Rausch Lawrence Department of Psychiatry, UMDNJ-Robert W. Johnson Medical School, 671 Hoes Lane, 08854, Piscataway, New Jersey aut NATIONALLICENCE 700 1- Edelberg Robert Department of Psychiatry, UMDNJ-Robert W. Johnson Medical School, 671 Hoes Lane, 08854, Piscataway, New Jersey aut NATIONALLICENCE 700 1- Porges Stephen University of Maryland, USA aut NATIONALLICENCE 773 0- Biofeedback and Self-regulation Kluwer Academic Publishers-Plenum Publishers 21/2(1996-06-01), 131-147 0363-3586 21:2<131 1996 21 10484 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer