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Cholinergic activation of the lobster cardiac ganglion

โœ Scribed by Sullivan, Robert E. ;Miller, Mark W.

Publisher
John Wiley and Sons
Year
1990
Tongue
English
Weight
919 KB
Volume
21
Category
Article
ISSN
0022-3034

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โœฆ Synopsis

The frequency of rhythmic burst activity of the isolated lobster cardiac ganglion is increased by exogenously applied acetylcholine and muscarinic agonists. Responses of individual motor neurons isolated from the ganglion by transection consist of a slow depolarization and repetitive bursting. The pharmacological profile of the receptors mediating this response is similar to that of verte-brate neuronal muscarinic receptors. Isolated ganglia incubated in the presence of I3Hj-choline (18-19 h) exhibited radiolabelled acetylcholine accumulation. It is suggested that ganglionic excitation may be accomplished by extrinsic or intrinsic activation of muscarinic receptors on the motor neurons.

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Effects of perfusion pressure on the bursting neurones in the intact or segmented cardiac ganglion of the lobster, Panulirus japonicus
โœ Dr. T. Kuramoto; A. Ebara ๐Ÿ“‚ Article ๐Ÿ“… 1985 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 790 KB

Impulse activity of the bursting neurones in the intact or segmented cardiac ganglion could be recorded in the isolated and freely beating hearts of lobsters. In the segmented ganglion, the four large cells (LCs), the medium cell (MC), and the four small cells (SCs) generated phasic, short tonic, an