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Sympathetic-parasympathetic interactions in the heart

Sympathetic-parasympathetic interactions in the heart,Mn Levy

Sympathetic-parasympathetic interactions in the heart   (Citations: 151)
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Published in 1970.
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    • ...The neural control of the heart is exerted by the tonic interaction between the sympathetic and parasympathetic limbs of the autonomic nervous system [1]...
    • ...Conversely, because of the ‘‘accentuated antagonism’’ initially proposed by Rosenblueth and Simeone in 1934 [9] and further developed by Levy [1], interest focused on the possibility of increasing vagal efferent activity...

    Peter J. SchwartzGaetanoet al. Sympathetic–parasympathetic interaction in health and disease: abnorma...

    • ... A bank of filters optimized to recognize self-similar patterns seems an efficient manner to maintain the cardiac regulation because it allows for independent regulation across the frequency spectrum. The challenge is to come up with a generative model that provides the characteristics of those filters just by observing the heart rhythm itself. The current experimental analysis of autonomic responses is able to derive the filtering proprieties of the heart. However, the coding mechanisms of an intact cardiac system remain unclear ...

    Fausto Lucenaet al. Statistical Coding and Decoding of Heartbeat Intervals

    • ...Concomitant activation of both autonomic arms (i.e., CWFI-induced increased vagal activity combined with post-exercise persistent sympathetic overactivity) may lead to a sympathovagal interaction, which might contribute to a higher vagal activation compared with resting conditions (Levy 1971; Tulppo et al. 1998)...
    • ...The Wingate test was aimed at markedly increasing sympathetic and reducing vagal activities (Goulopoulou et al. 2006) prior to the start of the submaximal exercise bout, so that the confounding effect of sympathetic overactivity (i.e., interaction; Levy 1971) on the post-exercise parasympathetic reactivation response to both recovery conditions could be investigated...
    • ...An increased vagal activation can be observed as a result of a sympathovagal interaction, which occurs when both arms of the autonomic system are highly activated (Levy 1971; Tulppo et al. 1998)...

    Hani Al Haddadet al. Influence of cold water face immersion on post-exercise parasympatheti...

    • ...Vertebrate hearts usually have dual autonomic innervation through inhibitory cholinergic nerves and stimulatory adrenergic nerves, which modulate heart rate (HR), impulse conduction and force of contraction via specific membrane receptors and intracellular signaling cascades [16,17]...
    • ...Noradrenaline and adrenaline of the sympathetic nervous system increase heart rate and force of contraction mainly by binding to beta-adrenergic receptors which use the cAMP-dependent pathway to increase SL Ca2+ current (ICa) and sarcoplasmic reticulum (SR) Ca 2+ uptake and release [17-19]...
    • ...Discussion The autonomic nervous system represents a major regulatory mechanism for short-term and long-term adjustments of cardiac function via muscarinic cholinergic and beta-adrenergic receptors [16,17]...
    • ...Contractility of the crucian carp atrium seems to be tuned high by tonic activation of the adenylate cyclasecAMP pathway, arguably to increase the scope of cholinergic regulation through the accentuated antagonism of adrenergic and cholinergic mechanisms [17]...

    Matti Vornanenet al. Sinoatrial tissue of crucian carp heart has only negative contractile ...

    • ...Reciprocal modulation between sympathetic and parasympathetic cardiac innervation (Levy, 1971, 1984), or attenuation of postganglionic parasympathetic signals by regulatory neurons, might account for selective inhibition of ventricular acetylcholine turnover during vagal stimulation...

    Donald D. Lundet al. Vagus Nerve Stimulation Alters Regional Acetylcholine Turnover in Rat ...

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