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  • Title: Impulse blockade in frog cardiac ganglion does not resemble partial denervation in changing synaptic organization.
    Author: Roper S, Ko CP.
    Journal: Science; 1978 Oct 06; 202(4363):66-8. PubMed ID: 308697.
    Abstract:
    Partial denervation of parasympathetic neurons in the frog heart by surgical section of one vagus nerve results in a marked reorganization of functional synaptic connections made by the remaining vagus nerve. These changes are not simply due to a lack of impulse activity per se in the sectioned nerve because blockage of impulses in one vagus with tetrodotoxin-impregnated cuffs did not cause similar changes in the innervation pattern of the ganglion. Furthermore, tetrodotoxin-blocked vagal fibers retain their ability to sprout and can form new synapses on denervated neurons.
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