vagal tone

This is thought to be caused by changes in the vagal tone during respiration.

Instead, other biological processes are measured that represent the functionality of vagal tone.

Vagal tone has been used in medical and psychological research to better understand the physiological underpinnings of various disorders.

This seems to be due to an increase in vagal tone, a measure of the control the vagus nerve has over the heartbeat.

Wandering pacemaker is usually caused by varying vagal tone.

A decrease in vagal tone and increase in sympathetic tone is the cause.

When vagal tone to the heart's pacemaker is high, a baseline or resting heart rate is produced.

Vagal tone cannot be directly measured.

Professional athletes typically maintain very high vagal tone and RSA levels.

With the exception of the neonatal, high baseline vagal tone levels in children lead to a variety of positive effects.

Interestingly, there are implications that parental relationships have a significant effect on later expression of vagal tone, even surpassing the childhood years.

Exposure to interparental conflict and children's adjustment and physical health: the moderating role of vagal tone.

Pressure on the carotid artery can also cause vagal tone induced bradycardia, which can eventually stop the heart.

Increased vagal tone.

After vagal tone decreases, the SA Node assumes its natural pace.

A junctional escape complex is a normal response that may result from excessive vagal tone on the SA node.

On the other hand, decreased vagal tone is associated with illnesses and medical complications that compromise the CNS.

Cardiac vagal tone has been treated as a physiologic substrate of regulation of emotion and arousal.

In the resting state, there is a large degree of vagal tone on the heart, which is responsible for low resting heart rates.

Under resting conditions, vagal tone prevails and variations in heart period are largely dependent on vagal modulation.

Other traits that correlate with IED are low vagal tone and increased insulin secretion.

Typically, researchers are concerned with baseline vagal tone, treating it either as a potential predictor of behavior or examining its relationship with mental health (particularly emotion).

Thus, while we do not explicitly measure vagal tone, we do measure changes in heart rate which are a result of respiratory sinus arrhythmia.

Further testing showed that chronic fatigue patients have abnormal vagal tone, meaning the major nerve that syncopates their breathing and heart rate is out of sync.

Other research has implicated PM in irregular heart rhythm, reduced heart rate variability (decreased vagal tone), and most notably heart failure.