The use of heart rate variability (HRV) in research has been greatly popularized over the
past decades due to the ease and affordability of HRV collection, coupled with its clinical …

Healthy biological systems exhibit complex patterns of variability that can be described by
mathematical chaos. Heart rate variability (HRV) consists of changes in the time intervals …

Psychophysiological research integrating heart rate variability (HRV) has increased during
the last two decades, particularly given the fact that HRV is able to index cardiac vagal tone …

Heart-rate variability (HRV) is frequently introduced as mirroring imbalances within the
autonomous nerve system. Many investigations are based on the paradigm that increased …

Contemplative practices, such as meditation and yoga, are increasingly popular among the
general public and as topics of research. Beneficial effects associated with these practices …

Respiratory rate (RR) is an important physiological parameter whose abnormality has been
regarded as an important indicator of serious illness. In order to make RR monitoring simple …

Heart rate data are often collected in human factors studies, including those into vehicle
automation. Advances in open hardware platforms and off-the-shelf photoplethysmogram …

In the last two decades, a growing body of theory and research has targeted the role of
cardiac vagal control (CVC) in emotional responding. This research has either focused on …

Highlights•RSA is a valid and reliable biomarker of emotion regulation capacity in
humans.•Low tonic RSA and excessive RSA reactivity to emotion evocation mark PFC …

The number of publications investigating heart rate variability (HRV) in psychiatry and the
behavioral sciences has increased markedly in the last decade. In addition to the significant …