There have been many reports about the intrinsic cardiac ganglion in recent years.Most of them are ultrastructural and immunohistochemical investgations,in which many neuropeptides have been localized in the nerve cells and fibers of the mammalian heart,such as vasoactive intestinal polypeptides,neuropeptide Y,neurotensin,substance P and so on.These reports suggested that the intrinsic cardiac ganglia are not only cholinergic but have also other properties.However,their function need to be studied further.Are there any sensory neurons and interneurons which transmit information from the heart to the intrinsic or extrinsic cardiac ganglia,as well as to the central nervous system,in these ganglia?Up to now,there have been no reports about this question.
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