Wiens B L, Brownell P H
Department of Zoology, Oregon State University, Corvallis 97331-2914.
J Comp Physiol A. 1990 May;167(1):51-9. doi: 10.1007/BF00192405.
The heart of the nudibranch mollusc Archidoris montereyensis is regulated by a small number of powerful effector neurons located in the right pleural and visceral ganglia. Two identifiable neurons in the pleural ganglion, a heart excitor (PlHE) and a heart inhibitor (PlHI), are especially important regulators of cardiac function in that low levels of spontaneous activity in either cell significantly alters the amplitude and rate of heart contractions. These neurons have extensive dendritic arbors within the right pleural ganglion and branching axonal processes within the visceral ganglion. The visceral ganglion also contains a heart excitor neuron (VHE) and at least two heart inhibitor neurons (VHI cells), but their influence on cardiac activity is weaker than that of the pleural ganglion cells. All of these heart effector cells appear to be motor neurons with axons that terminate predominantly in the atrio-ventricular valve region of the heart via the pericardial nerve. The simplicity and strength of these neuronal connections to the heart of Archidoris make this a favorable preparation for studies of cardiac regulation.
海蛞蝓软体动物蒙特雷阿氏多彩海牛的心脏由位于右侧胸膜和内脏神经节中的少数强大的效应神经元调节。胸膜神经节中的两个可识别神经元，一个心脏兴奋神经元（PlHE）和一个心脏抑制神经元（PlHI），是心脏功能的特别重要调节者，因为任一细胞中低水平的自发活动都会显著改变心脏收缩的幅度和速率。这些神经元在右侧胸膜神经节内有广泛的树突分支，在内脏神经节内有分支的轴突。内脏神经节还包含一个心脏兴奋神经元（VHE）和至少两个心脏抑制神经元（VHI细胞），但它们对心脏活动的影响比胸膜神经节细胞的影响弱。所有这些心脏效应细胞似乎都是运动神经元，其轴突主要通过心包神经终止于心脏的房室瓣区域。这些神经元与蒙特雷阿氏多彩海牛心脏的连接简单且有力，这使得它成为研究心脏调节的有利标本。
