Oculomotor neurons in fish: Electrotonic coupling and multiple sites of impulse initiation

Mahlon E. Kriebel, Michael V.L. Bennett, Stephen G. Waxman, George D. Pappas

Research output: Contribution to journalArticle

56 Scopus citations

Abstract

Oculomotor neurons are electrotonically coupled in three teleosts. Electron microscopy revealed axosomatic synapses with close appositions of pre- and postynaptic membranes. Similar junctions are associated with electrotonic- coupling in many other cases. Stimulation of the ipsilateral eighth nerve usually initiated impulses at sites distant from the cell bodies; stimulation of the ipsilateral ophthalmic nerve initiated impulses close to the cell bodies. Electrotonic coupling may synchronize impulses arising near the cell bodies to generate synchronous muscle contractions. Impulses arising distant from the cell bodies may lead to contractions of graded strength.

Original languageEnglish (US)
Pages (from-to)520-524
Number of pages5
JournalScience
Volume166
Issue number3904
DOIs
StatePublished - Jan 1 1969
Externally publishedYes

ASJC Scopus subject areas

  • General

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