Key result
Mastication of a chewing gum base increased the low-frequency band spectral power and LF/HF ratio, and decreased the high-frequency band spectral power, indicating enhanced sympathetic activity.
Why the study?
Does mastication of chewing gum base alter sympatho-vagal balance as measured by heart rate variability in healthy young subjects?
Does mastication of chewing gum base alter sympatho-vagal balance as measured by heart rate variability in healthy young subjects?
Mastication alters autonomic nervous balance by enhancing sympathetic activity and/or suppressing parasympathetic activity, as evidenced by changes in heart rate variability.
May enhance sympathetic tone during gum chewing in healthy youth; leaves open relevance to cardiovascular risk or patient populations.
Mastication modulates the autonomic nervous activity of the digestive glands and the heart. The autonomic nervous balance is evaluated with spectral analysis of heart rate variability. In the present study, we investigated the effects of mastication of chewing gum base on heart rate variability to clarify the role of mastication in the sympatho-vagal balance for the regulation of the heart rate. Mastication of a chewing gum base stimulated the salivary secretion and shortened the R-R intervals in the electrocardiogram of healthy young subjects without swallowing of saliva at a fixed rate of respiration. Based on the analysis of heart rate variability, mastication increased the low-frequency band spectral power (LF), and decreased the high-frequency band spectral power (HF). The LF/HF was markedly increased by the mastication. Mastication enhances the sympathetic nervous activity and/or suppresses the parasympathetic nervous activity for the heart. Feeding behaviour with mastication might play a role in the modulation of the autonomic nervous activity.
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Shiba et al. (2002) studied Healthy. Mastication of chewing gum base was evaluated on Heart rate variability (LF, HF, and LF/HF ratio). Mastication of a chewing gum base increased the low-frequency band spectral power and LF/HF ratio, and decreased the high-frequency band spectral power, indicating enhanced sympathetic activity.
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