scholarly journals Time-of-Day-Dependent Effects of Monochromatic Light Exposure on Human Autonomic Nervous System

2009 ◽  
Vol 12 (2) ◽  
pp. 55-61 ◽  
Author(s):  
Ming An ◽  
Jinghua Huang ◽  
Yoshihiro Shimomura ◽  
Tetsuo Katsuura
Keyword(s):  
Nervous System ◽  
Autonomic Nervous System ◽  
Light Exposure ◽  
Monochromatic Light ◽  
Time Of Day ◽  
Autonomic Nervous

scholarly journals The biological clock tunes the organs of the body: timing by hormones and the autonomic nervous system

2003 ◽  
Vol 177 (1) ◽  
pp. 17-26 ◽  
Author(s):  
RM Buijs ◽  
CG van Eden ◽  
VD Goncharuk ◽  
A Kalsbeek
Keyword(s):  
Nervous System ◽  
Autonomic Nervous System ◽  
Biological Clock ◽  
Well Being ◽  
Time Of Day ◽  
The Body ◽  
Physiological Data ◽  
Basic Principles ◽  
Autonomic Nervous ◽  
Similar Organization

The biological clock, the suprachiasmatic nucleus (SCN), is essential for our daily well-being. It prepares us for the upcoming period of activity by an anticipatory rise in heart rate, glucose and cortisol. At the same time the 'hormone of the darkness', melatonin, decreases. Thus, the time-of-day message penetrates into all tissues, interestingly not only by means of hormones but also by a direct neuronal influence of the SCN on the organs of the body. The axis between the SCN and the paraventricular nucleus of the hypothalamus (PVN) is crucial for the organization/synchronization of the neuroendocrine and autonomic nervous system with the time of day. This SCN-neuroendocrine PVN axis takes care of a timely hormonal secretion. At the same time, the SCN-autonomic PVN axis fine-tunes the organs by means of the autonomic nervous system for the reception of these hormones. Finally, the similar organization of the projections of the human SCN as compared with that in the rodent brain suggests that these basic principles of neuroendocrine autonomic interaction may also be true in the human. The physiological data collected in humans thus far seem to support this hypothesis, while pathological changes in the SCN of humans suffering from depression or hypertension indicate a role for the SCN in the etiology of these diseases.

scholarly journals Heart Rate Variability in Sport Performance: Do Time of Day and Chronotype Play A Role?

2019 ◽  
Vol 8 (5) ◽  
pp. 723 ◽  
Author(s):  
Jacopo Antonino Vitale ◽  
Matteo Bonato ◽  
Antonio La La Torre ◽  
Giuseppe Banfi
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Nervous System ◽  
Autonomic Nervous System ◽  
Time Course ◽  
Sport Performance ◽  
Time Of Day ◽  
Activity Levels ◽  
Autonomic Nervous ◽  
Invasive Method

A reliable non-invasive method to assess autonomic nervous system activity involves the evaluation of the time course of heart rate variability (HRV). HRV may vary in accordance with the degree and duration of training, and the circadian fluctuation of this variable is crucial for human health since the heart adapts to the needs of different activity levels during sleep phases or in the daytime. In the present review, time-of-day and chronotype effect on HRV in response to acute sessions of physical activity are discussed. Results are sparse and controversial; however, it seems that evening-type subjects have a higher perturbation of the autonomic nervous system (ANS), with slowed vagal reactivation and higher heart rate values in response to morning exercise than morning types. Conversely, both chronotype categories showed similar ANS activity during evening physical tasks, suggesting that this time of day seems to perturb the HRV circadian rhythm to a lesser extent. The control for chronotype and time-of-day effect represents a key strategy for individual training schedules, and, in perspective, for primary injury prevention.

EEG-vigilance and the autonomic nervous system

2010 ◽  
Vol 41 (01) ◽  
Author(s):  
S Olbrich ◽  
C Sander ◽  
M Trenner ◽  
H Matschinger ◽  
P Schönknecht ◽  
...  
Keyword(s):  
Nervous System ◽  
Autonomic Nervous System ◽  
Autonomic Nervous
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