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an encapsulated neural structure consisting of a collection of cell bodies or neurons

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It should be pointed out that since baroreflex-mediated reduction of heart rate in response to increased arterial pressure had a trend of increase but not significantly, it appears that the increased signaling from the aortic depressor baroreceptor nerves to the brainstem is buffered by other neural components of the baroreflex loop, such as the NTS, NA, or cardiac ganglia within the heart.
Degeneration of vagal efferent axons and terminals in cardiac ganglia of aged rats," Journal of Comparative Neurology, vol.
Cardiac ganglia contain more than four times more M2 mRNA than what it is found at the presynaptic level in the atria (14).
These results suggest that M2, M3 and M4 muscarinic receptor subtypes in the central nuclei, in the cardiac ganglia or in the heart muscle have different distribution.
In support of this type of action, pericardial organ extracts were found to increase cAMP levels in Homarus cardiac ganglia, and pharmacological manipulations that increased cAMP mimicked the effect of PO extracts (Lemos and Berlind, 1981), Manipulations expected to increase NO levels increased cGMP levels and inhibited activity of the CG, while decreasing NO synthase activity decreased cGMP levels and increased burst frequency (Labenia et al.