Azevedo A D, Véras-Silva A S
Departamento de Fisiologia e Biofisica, Universidade Federal de Minas Gerais, Belo Horizonte, Brasil.
Braz J Med Biol Res. 1987;20(6):845-50.
The present study describes, for the first time, the autonomic changes concomitant to the defense reaction in the opossum. Electrical stimulation of 2305 sites in the hypothalamus and brain stem evoked from 7% of them patterns of response including 40-240% muscle vasodilatation, characteristic of the defense reaction in anaesthetized animals. These responses also included a rise in arterial blood pressure, tachy- or bradycardia, and variable changes in ventilaton ranging from apneusis to polypnea. It is suggested that the defense areas of the opossum are similar to those described for other species, but the defense responses resemble those of the rabbit.
本研究首次描述了负鼠防御反应时伴随的自主神经变化。对下丘脑和脑干的2305个位点进行电刺激，其中7%引发了反应模式，包括40%-240%的肌肉血管舒张，这是麻醉动物防御反应的特征。这些反应还包括动脉血压升高、心动过速或心动过缓，以及从呼吸暂停到呼吸急促的通气变化。研究表明，负鼠的防御区域与其他物种所描述的相似，但防御反应类似于兔子的防御反应。
