Dynamic Cardiovagal Response to Motion Sickness: A Point-Process Heart Rate Variability Study.
A visual display of stripes was used to examine cardio-vagal response to motion sickness. Heart rate variability (HRV) was investigated using dynamic methods to discern instantaneous fluctuations in reaction to stimulus and perception-based events. A novel point process adaptive recursive algorithm was applied to the R-R series to compute instantaneous heart rate, HRV, and high frequency (HF) power as a marker of vagal activity. Results show interesting dynamic trends in each of the considered subjects. HF power averaged across ten subjects indicates a significant decrease 20s to 60s following the transition from "no nausea" to "mild." Conversely, right before "strong" nausea, the group average shows a transient trending increase in HF power. Findings confirm gradual sympathetic activation with increasing nausea, and further evidence transitory increases in vagal tone before flushes of strong nausea.
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MGH/MIT/HMS Martinos Center for Biomedical Imaging, Dept of Radiology, MGH, Charlestown, MA, USA.
Napadow
V
V
Kuo
B
B
Park
K
K
Kim
J
J
Brown
En
E
Barbieri
R
R
Circulation. 2000 Jun 13;101(23):E215-20
10851218
Aviat Space Environ Med. 1993 Sep;64(9 Pt 1):813-9
8216142
Eur Heart J. 1996 Mar;17(3):354-81
8737210
Aviat Space Environ Med. 1980 Mar;51(3):211-4
7362567
Psychophysiology. 2005 Sep;42(5):616-25
16176385
J Vestib Res. 1998 Jan-Feb;8(1):95-105
9416595
J Vestib Res. 1995 Jan-Feb;5(1):25-33
7711945
Dig Dis Sci. 1999 Aug;44(8 Suppl):53S-57S
10490040
Aviat Space Environ Med. 1987 Feb;58(2):136-42
3827789
Am J Physiol Heart Circ Physiol. 2005 Jan;288(1):H424-35
15374824
Psychophysiology. 1986 Sep;23(5):542-51
3809361
Neuroimage. 2008 Aug 1;42(1):169-77
18524629
IEEE Trans Biomed Eng. 2006 Jan;53(1):4-12
16402597
J Auton Nerv Syst. 1997 Dec 3;67(1-2):31-7
9470142
Brain Res Bull. 1998 Nov 15;47(5):507-16
10052582