Stomatogastric ganglion

In crustaceans true FMRFamides are not known, but only FLRFamides (Table 5). They were first isolated from the PO of H. americanus [194] and later found in crabs, crayfish and a prawn [195]. Their functional role is most likely neurohormonal, i.e. probably cardioexcitatory and influencing contractions of visceral muscles, as well as neuromodulatory, i.e. modulating motor patterns in the stomatogastric ganglion [150]. 

Stomatogastric ganglion neurons Epstein and Marder [1990] constructed a HH-type model of the lobster stomatogastric ganglion neuron with a fast sodium current, a delayed rectifier potassium current a voltage-dependent calcium current, a calcium-dependent potassium current, and a linear leakage current in order to study the mechanism of bursting oscillations in these cells. 

Figure 12.18 Bursting behavior in (a) the transmembrane potential of a neuron in the crustacean stomatogastric ganglion (Adapted from Sharp, 1994.) (b) two coupled CSTRs, each of whose flow rates is modified according to the iodide concentration in the other reactor. Input concentrations in each reactor [ClOJo = 1 x 10 M, [I ]o = 4.2 X 10 " M. Note the similarity between the neural and chemical traces if one reverses the sign of the potential in one of the recordings. (Adapted from Dolnik and Epstein, 1993.)...

Buchholtz, F. Golowasch, J. Marder, E. Epstein, I. R. 1992. Mathematical Model of an Identified Stomatogastric Ganglion Neuron, J. Neurophysiol. 67, 332-340. 

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