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  • Title: Sucrose-gap recordings of nerve-evoked potentials in mammalian parasympathetic ganglia.
    Author: Griffith WH, Gallagher JP, Shinnick-Gallagher P.
    Journal: Brain Res; 1981 Mar 30; 209(2):446-51. PubMed ID: 6261869.
    Abstract:
    The sucrose-gap recording technique was used to study mammalian parasympathetic ganglionic transmission. Both a fast nicotinic depolarization potential and a slow muscarinic hyperpolarizing potential were recorded in vesical pelvic ganglia (VPG). A long afterhyperpolarization caused by an electrical response of through-fibers was also recorded. However, a slow excitatory postsynaptic potential (S-EPSP) was not readily observed and may be masked by the long afterhyperpolarization. In addition, the slow inhibitory postsynaptic potential (S-IPSP) of the VPG was due to a direct effect of acetylcholine (ACh). Thus, sucrose-gap recordings of VPG potentials are similar to those obtained in sympathetic ganglia, but the mechanism for transmission of the S-IPSP may be different in the respective ganglia.
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