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- Vagal_tone abstract "Vagal tone is an internal biological process referring to the activity of the vagus nerve, the tenth cranial nerve located in the medulla oblongata of the brainstem. The vagus nerve serves as the key component of the parasympathetic branch of the autonomic nervous system, regulating the homeostasis (or “resting state”) of the majority of the body’s internal organ systems that operate on a largely subconscious level, such as the heart, lungs, eyes, glands and digestive tract. Due to the regulatory nature of the parasympathetic nervous system (PSNS), vagal activity is continuous, chronic, and passive (“tone” in this usage is analogous to “tension”).In the context of psychophysiological research, vagal tone (and specifically its influence on heart rate) represents an index for the functional state of the entire parasympathetic nervous system. Heart rate is normally controlled by multiple centers in the brainstem; one of these centers, the nucleus ambiguus, increases parasympathetic nervous system input to the heart via the vagus nerve. Vagal tone decreases heart rate by inhibiting the firing rate of the sinoatrial node (S-A node, the \"pace-maker\" tissue of the heart). The absolute level of cardiac vagal activity or vagal tone appears to result from the excitatory drive from peripheral baroreceptors. In animals, cardiac vagal activity disappears at very low pressures or if the afferent nerves are cut. Thus, a major determinant of resting heart rate is the beat to beat activation of the arterial baroreflex with each cardiac cycle.Cardiac vagal tone has been treated as a physiologic substrate of regulation of emotion and arousal.".
- Vagal_tone thumbnail Sinus_arythmia.JPG?width=300.
- Vagal_tone wikiPageExternalLink 565.
- Vagal_tone wikiPageID "9889145".
- Vagal_tone wikiPageLength "10083".
- Vagal_tone wikiPageOutDegree "15".
- Vagal_tone wikiPageRevisionID "702088063".
- Vagal_tone wikiPageWikiLink Autonomic_nervous_system.
- Vagal_tone wikiPageWikiLink Category:Cardiac_electrophysiology.
- Vagal_tone wikiPageWikiLink Electrocardiography.
- Vagal_tone wikiPageWikiLink Heart_rate_variability.
- Vagal_tone wikiPageWikiLink James_Mackenzie_(cardiologist).
- Vagal_tone wikiPageWikiLink Medulla_oblongata.
- Vagal_tone wikiPageWikiLink Nucleus_ambiguus.
- Vagal_tone wikiPageWikiLink Parasympathetic_nervous_system.
- Vagal_tone wikiPageWikiLink Perfusion.
- Vagal_tone wikiPageWikiLink Sinoatrial_node.
- Vagal_tone wikiPageWikiLink Vagus_nerve.
- Vagal_tone wikiPageWikiLink File:Sinus_arythmia.JPG.
- Vagal_tone wikiPageWikiLink File:VivoSenseHR_vs_Vt.jpg.
- Vagal_tone wikiPageWikiLinkText "Vagal tone".
- Vagal_tone wikiPageWikiLinkText "respiratory sinus arrhythmia".
- Vagal_tone wikiPageWikiLinkText "vagal tone".
- Vagal_tone wikiPageUsesTemplate Template:Citation_needed.
- Vagal_tone wikiPageUsesTemplate Template:Cite_journal.
- Vagal_tone subject Category:Cardiac_electrophysiology.
- Vagal_tone hypernym Process.
- Vagal_tone type Election.
- Vagal_tone type Redirect.
- Vagal_tone comment "Vagal tone is an internal biological process referring to the activity of the vagus nerve, the tenth cranial nerve located in the medulla oblongata of the brainstem. The vagus nerve serves as the key component of the parasympathetic branch of the autonomic nervous system, regulating the homeostasis (or “resting state”) of the majority of the body’s internal organ systems that operate on a largely subconscious level, such as the heart, lungs, eyes, glands and digestive tract.".
- Vagal_tone label "Vagal tone".
- Vagal_tone sameAs Q1195426.
- Vagal_tone sameAs Respirační_sinusová_arytmie.
- Vagal_tone sameAs Respiratorische_Sinusarrhythmie.
- Vagal_tone sameAs Arritmia_sinusal_respiratoria.
- Vagal_tone sameAs Aritmia_sinusale.
- Vagal_tone sameAs Niemiarowość_zatokowa.
- Vagal_tone sameAs m.02pv_8q.
- Vagal_tone sameAs Q1195426.
- Vagal_tone wasDerivedFrom Vagal_tone?oldid=702088063.
- Vagal_tone depiction Sinus_arythmia.JPG.
- Vagal_tone isPrimaryTopicOf Vagal_tone.