Phase coherency of respiratory sinus arrhythmia during food ingestion and gum chewing
Abstract
Previous study has suggested that phase coherency (λ) between RSA and respiration serve as a normalized index of the degree of mental stress. In the present study, we investigated whether λ is altered by food ingestion or gum chewing. After 5 min of rest, subjects were asked to eat the control meal (CM) or to chew a tasteless chewing gum (CG) at their own pace. From the oscillatory signals of RRI and respiration, instantaneous phases were calculated and then λ was computed. To assess autonomic activation, the normalized power for low- (nLF) and high-frequency (nHF) components of RRI fluctuations were also computed. Unexpectedly, transient increases in HR and BP and decrease in λ were observed from rest to CM or CG, suggesting a shift of sympathovagal balance toward a sympathetic activation. The λ correlated to nHF and was inversely related with nLF/nHF, suggesting the association of autonomic activity.
Journal
-
- Transactions of Japanese Society for Medical and Biological Engineering
-
Transactions of Japanese Society for Medical and Biological Engineering 52 (Supplement), O-404-O-405, 2014
Japanese Society for Medical and Biological Engineering
- Tweet
Details 詳細情報について
-
- CRID
- 1390282680243880960
-
- NII Article ID
- 130004948212
-
- ISSN
- 18814379
- 1347443X
-
- Text Lang
- ja
-
- Data Source
-
- JaLC
- CiNii Articles
-
- Abstract License Flag
- Disallowed