Sul meccanismo della tachicardia prodotta da stimoli emotivi naturali, nel cane
Federici, Antonio ; Granata, Lino ; Pinotti, Oreste ; Rizzo, Antonio
Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti, Tome 62 (1977), p. 458-464 / Harvested from Biblioteca Digitale Italiana di Matematica
Access to full text
Full (PDF)
Full (DjVu)

In 5 unanesthetized dogs, previously trained to lie quietly, we have studied the patterns of heart rate (FC), arterial pressure (PA), mesenteric blood flow (FM) and mesenteric resistance (RM = PA/FM) during emotional stress induced by a sudden loud noise. The experiments have been repeated after chronic sympathetic blockade with guanethidine. Mean values of FC, PA and RM have been calculated during a 20 sec control period, and second by second during a 30 sec period after the stimulus. The FC rises significantly and rapidly during the first 10 sec after the stimulus both in control and in treated dogs; in the latter, however, the rise in the first 7-8 sec after the stimulus is significantly smaller. In the control dogs RM and PA rise considerably together with FC. In the treated dogs RM and PA rise about 10 sec after the stimulus, probably as an effect of adrenal catecholamines. It is suggested that during the first 10 sec after the stimulus the rise of FC is only partially due to a sympathetic action, a significant role being played by parasympathetic inhibition.

Publié le : 1977-11-01
@article{RLINA_1977_8_63_5_458_0,
     author = {Antonio Federici and Lino Granata and Oreste Pinotti and Antonio Rizzo},
     title = {Sul meccanismo della tachicardia prodotta da stimoli emotivi naturali, nel cane},
     journal = {Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti},
     volume = {62},
     year = {1977},
     pages = {458-464},
     language = {it},
     url = {http://dml.mathdoc.fr/item/RLINA_1977_8_63_5_458_0}
}

Federici, Antonio; Granata, Lino; Pinotti, Oreste; Rizzo, Antonio. Sul meccanismo della tachicardia prodotta da stimoli emotivi naturali, nel cane. Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti, Tome 62 (1977) pp. 458-464. http://gdmltest.u-ga.fr/item/RLINA_1977_8_63_5_458_0/

[1] Bruno, F., Guazzi, M. e Pinotti, O. (1961) - On the mechanism of the tachycardia produced by electrical stimulation of the posterior hypothalamus, « Arch. ital. Biol.», 99, 68-87.

[2] Caraffa Braga, E., Granata, L. e Pinotti, O. (1973) - Changes in blood-flow distribution during acute emotional stress in dogs, «Pflügers Arch.», 339, 203-216.

[3] Corazza, R. e Granata, L. (1963) - Ipotalamo e riflessi carotidei nella regolazione del flusso ematico in alcuni territori vascolari, «Arch. Sci. biol.», 47, 259-274.

[4] Federici, A., Granata, L., Leomanni, R., Martinelli, A., Marzotta, S., Mona, G., Ruccia, D. e Sorrentino, G. - Intraluminal pressure of the jejunum and mesenteric vascular resistance in the conscious resting dog, «Boll. Soc. it. Biol. sper.» (in stampa).

[5] Goodman, L. S. e Gilman, A. (1971) - The pharmacological basis of therapeutics. Mac Millan, London.

[6] Granata, L., Leone, D., Paccione, F. e Rucci, E. (1973) - Metodo per lo studio della funzione motoria dell'intestino in animali non narcotizzati, «Boll. Soc. it. Biol. sper.», 49, 832-835.

[7] Granata, L., Leone, D., Paccione, F. e Ruccia, D. (1973) — Changes in jejunal motility during emotional reactions, «Arch. Sci. biol.», 57, 87-97.

[8] Levy, M. N. (1971) - Sympathetic-parasympathetic interactions in the heart, «Circ. Res.», 29, 437-445.

[9] Lison, L. (1961) - Statistica applicata alla biologia sperimentale. Ambrosiana, Milano.

[10] Noble, M. I. M., Stubbs, J., Trenchard, D., Else, W., Eisele, J. H. e Guz, A. (1972) - Left ventricular perfornarne in the conscious dog with chronically denervated heart, «Car diovascular Res.», 6, 457-477.

[11] Scher, A. M. e Young, A. C. (1970) - Reflex control of heart rate in the unanesthetized dog, «Amer. J. Physiol.», 218, 780-789.

[12] Vatner, S. F., Franklin, D., Van Citters, L. e Braunwald, E. (1970) - Effects of carotid sinus nerve stimulation on the coronary circulation of the conscious dog, «Circ. Res.», 27, 11-21.

[13] Warner, H. R. e Cox, A. (1962) - A mathematical model of heart rate control by sympathetic and vagus efferent information, «J. appl. Physiol.», 17, 349-358-