| 21. | As discussed previously, increased activation of the NTS inhibits the vasomotor center and stimulates the vagal nuclei.
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| 22. | Under resting conditions, vagal tone prevails and variations in heart period are largely dependent on vagal modulation.
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| 23. | Under resting conditions, vagal tone prevails and variations in heart period are largely dependent on vagal modulation.
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| 24. | These latter actions may augment the effects of hypoxia by approximating the Valsalva maneuver, causing vagal stimulation.
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| 25. | During the process of RSA inhalation temporarily suppresses vagal activity, causing an immediate increase in heart rate.
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| 26. | A junctional escape complex is a normal response that may result from excessive vagal tone on the SA node.
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| 27. | The progressive dilation of the airway with increasing exercise is mediated by a progressive reduction in resting vagal tone.
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| 28. | Post-mortem examination showed that Whittle had not died from strangulation but had died instantaneously from vagal inhibition.
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| 29. | However, ECL cells are activated directly by ACh on M1 receptors from direct vagal innervation leading to histamine release.
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| 30. | Vagal stimulation of the peptidergic neurons, occurring simultaneously, leads to the release of gastrin-releasing-peptide.
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