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[猫延髓尾端腹外侧区神经元在心脏血流动力学反应实现机制中的作用]

[The role of neurons of the caudal ventrolateral region of the medulla oblongata of cats in the mechanism of realization of the cardio-hemodynamic reaction].

作者信息

Vereskun S B, Dmitrieva A V, Kartseva A G

出版信息

Fiziol Zh (1978). 1990 May-Jun;36(3):20-5.

PMID:2394243
Abstract

Glycine injection to the identified area of the RVLM leads to the development of a characteristic depressor reaction, due to a decrease of the total peripheral vascular resistance (TRP). Glycine injection to the identified area of CVLM results in the developing pressor reaction also due to the changes of TRP. Glycine injection to CVLM under preliminary functional switch-off the RVLM neuronal activity is not accompanied by the development of pressor reaction. This can be an evidence that CVLM sympathoinhibitory neurones act on cardiohemodynamics by their interaction with RVLM sympathoexcitatory neurones. Turn off of the tonically active sympathoinhibitory CVLM neurones does not affect the character of the reactions depending on the inhibition or excitation of sympathoexcitatory RVLM neurones.

摘要

向延髓头端腹外侧区(RVLM)的特定区域注射甘氨酸会导致典型的降压反应,这是由于总外周血管阻力(TRP)降低所致。向尾端延髓腹外侧区(CVLM)的特定区域注射甘氨酸也会导致升压反应,同样是由于TRP的变化。在预先使RVLM神经元活动功能关闭的情况下向CVLM注射甘氨酸,不会伴随升压反应的出现。这可能证明CVLM交感抑制性神经元通过与RVLM交感兴奋性神经元相互作用来影响心血管动力学。关闭持续活跃的交感抑制性CVLM神经元,并不影响依赖于交感兴奋性RVLM神经元抑制或兴奋的反应特征。

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