Cardiac and respiratory rhythmicities in cutaneous and muscle vasoconstrictor neurones to the cat's hindlimb
Tóm tắt
Cardiac and respiratory rhythmicities have been investigated quantitatively in postganglionic vasoconstrictor neurones supplying skeletal muscle and skin of the hindlimb in chloralose anaesthetized, immobilized cats. Both rhythmicities are largest in muscle vasoconstrictor neurones, smaller in vasoconstrictor neurones supplying hairy skin, and smallest in vasoconstrictor neurones supplying hairless skin. The magnitude of the cardiac rhythmicity in the vasoconstrictor neurones is positively correlated with the quantitative reaction to systemic hypoxia.
Tài liệu tham khảo
Cohen, M.I., Gootman, P.M.: Periodicities in efferent discharge of splanchnic nerve of the cat. Amer. J. Physiol.218, 1092–1101 (1970).
Delius, W., Hagbarth, K.-E., Hongell, A., Wallin, B.G.: General characteristics of sympathetic activity in human muscle nerves. Acta physiol. scand.84, 65–81 (1972).
Gregor, M., Jänig, W.: Effects of systemic hypoxia and hypercapnia on cutaneous and muscle vasoconstrictor neurones to the cat's hindlimb. Pflügers Arch.368, 71–81 (1977).
Hagbarth, K.-E., Hallin, R.G., Hongell, A., Torebjörk, H.E., Wallin, B.G.: General characteristics of sympathetic activity in human skin nerves. Acta physiol. scand.84, 164–176 (1972).
Hagbarth, K.-E., Vallbo, A.B.: Pulse and respiratory grouping of sympathetic impulses in human muscle nerves. Acta physiol. scand.74, 96–108 (1968).
Jänig, W., Kümmel, H.: Functional discrimination of postganglionic neurones to the cat's hindpaw with respect to the skin potentials recorded from the hairless skin. Pflügers Arch. (1977) in the press.
Koizumi, K., Seller, H., Kaufman, A., Brooks, C. McC.: Pattern of sympathetic discharges and their relation to baroreceptor and respiratory activities. Brain Res.27, 281–294 (1971).
Ninomiya, I., Irisawa, A., Nisimaru, N.: Nonuniformity of sympathetic nerve activity to the skin and kidney. Amer. J. Physiol.224, 256–264 (1973).
Okada, H., Fox, I.J.: Respiratory grouping of abdominal sympathetic activity in the dog. Amer. J. Physiol.213, 48–56 (1967).
Preiss, G., Kirchner, F., Polosa, C.: Patterning of sympathetic preganglionic firing by the central respiratory drive. Brain Res.87, 363–374 (1975).
Seller, H.: The discharge pattern of single units in thoracic and lumbar white rami in relation to cardiovascular events. Pflügers Arch.343, 317–330 (1973).
Seller, H., Langhorst, P., Richter, D., Koepchen, H.P.: Über die Abhängigkeit der pressoreceptorischen Hemmung des Sympathicus von der Atemphase und ihre Auswirkung in der Vasomotorik. Pflügers Arch.302, 300–314 (1968).
Tang, P.C., Maire, F.W., Amassian, V.E.: Respiratory influence on the vasomotor center. Amer. J. Physiol.191, 218–224 (1957).