Department of Animal Biology and Marine Ecology, Faculty of Science, University of Messina, Italy.
Acta Histochem. 2011 Sep;113(5):578-84. doi: 10.1016/j.acthis.2010.06.004. Epub 2010 Jul 24.
Anatomical and functional studies of the autonomic innervation in the conus arteriosus of the garfishes are lacking. This study reveals that the conus arteriosus of the longnose gar is primarily myocardial in nature, but additionally, large numbers of smooth muscle cells are present in the subendocardium. A well-developed system of adrenergic, cholinergic, substance P (SP) and neuronal nitric oxide synthase (nNOS) positive nerve terminals are found in the wall of the conus arteriosus. Coronary blood vessels running in the adventitia receive a rich supply of nNOS positive nerve fibers, thus suggesting their importance in the nitrergic control of blood flow in the conus arteriosus. The present data show that the patterns of autonomic innervation of the garfish conus arteriosus are more complex than previously appreciated.
关于长嘴鳄动脉圆锥的自主神经支配的解剖和功能研究尚属空白。本研究表明，长鼻雀鳝的动脉圆锥主要是心肌性质的，但在心内膜下也存在大量的平滑肌细胞。在动脉圆锥的壁中发现了一个发达的肾上腺素能、胆碱能、P 物质（SP）和神经元型一氧化氮合酶（nNOS）阳性神经末梢系统。在动脉圆锥的动脉外膜中运行的冠状动脉接受丰富的 nNOS 阳性神经纤维供应，这表明它们在氮能控制动脉圆锥血流中具有重要作用。目前的数据表明，雀鳝动脉圆锥的自主神经支配模式比以前认为的更为复杂。
