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Science 2 January 1981:
Vol. 211. no. 4477, pp. 67 - 70
DOI: 10.1126/science.7444449
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Articles

Science, Vol 211, Issue 4477, 67-70
Copyright © 1981 by American Association for the Advancement of Science

articles

Dye coupling and possible electrotonic coupling in the guinea pig neocortical slice

MJ Gutnick and DA Prince

Iontophoretic injection of the fluorescent dye Lucifer Yellow CH into single neurons of guinea pig neocortical slices resulted in the staining of more than one cell. Dye-coupled neuronal aggregates were found only in the superficial cortical layers and were often organized in vertical columns. Antidromic stimuli evoked all-or-none, subthreshold depolarizations in some superficial cells. These potentials were not eliminated by manganese and did not collide with spikes originating in the soma, suggesting that they arose from electrotonic interaction between superficial cortical neurons.


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