Since the mean heart rate is not constant (it evolves continuously in challenging situations, such as physical and mental effort, especially in critically ill patients), the HRV signal was corrected by the time-varying mean heart rate [33], yielding the modulating signal which, according to the IPFM model, represents autonomic nervous system modulation over the sinoatrial node.
The latter represents a nervous system in the gastrointestinal tract, controlling epithelial transport, motility and blood flow [2].
The low frequency percentage (LF%) and the low frequency-high frequency (LF/HF) ratio were used to represent sympathetic nervous activity, and the high frequency (HF) was used to represent parasympathetic nervous activity.
These variations in fine motor movements may represent the nervous system's equivalent of a bit of static on a phone line: something that can't be completely controlled but is nothing to really worry about either.
An alternative view, however, is that toxicity arises from soluble intermediates or oligomeric forms, and that the end-point aggregates simply represent the nervous system's attempts to sequester proteins it is unable to dispose of by standard proteasomal and autophagic routes.
In contrast, the RMSSD, which represents the parasympathetic nervous activity, was low during the day and high during the night.
Because the item, "When I meet a lot of people, I get nervous" represents conceptually not only social inhibition but also negative affectivity dimension in Taiwan culture, only the other two items were kept with the original 7-item SI subscale to form the 9-item second draft of the SI subscale.
Even signing up to principles that investors have traditionally felt very nervous about represents real progress.
How motor skills are stored in the nervous system represents a fundamental question in neuroscience.
