The electrophysiology of electric organs of marine electric fishes: II. The electroplaques of main and acccessory organs of narcine brasiliensis

M. V.L. Bennett, H. Grundfest

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Abstract

Studies on the electric organs of Narcine brasiliensis and particularly of the responses of the electroplaques of the accessory organ confirm and amplify data obtained on the electroplaques of Torpedo nobiliana. Only the innervated surface is electrogenically reactive and the uninnervated surface has a low resistance, as in Torpedo electroplaques. However, in the accessory organ of Narcine the innervated surface is the dorsal, rather than the ventral, and it has a different pattern of innervation. The responses of single cells of the accessory organ exhibit marked facilitation on repetitive stimulation. The facilitated responses, like the individual responses of Torpedo and of the main organ of Narcine, are electrochemically graded on changing the membrane potential with applied currents, and are inverted in sign when outward currents through the innervated face are very strong.

Original languageEnglish (US)
Pages (from-to)805-818
Number of pages14
JournalJournal of General Physiology
Volume44
Issue number4
DOIs
StatePublished - Mar 1 1961

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ASJC Scopus subject areas

  • Physiology

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