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Brain Res. 1981 Jun 1;213(2):486-92.

Dye-coupling between glial cells in the guinea pig neocortical slice.


Physiologically identified glial cells in guinea pig neocortical slices were injected with the low molecular weight, fluorescent dye Lucifer yellow CH. The stained aggregates which resulted consisted of one brightly stained, central cell surrounded by numerous lightly stained cells. The central cell had well defined feathery processes and resembled a protoplasmic astrocyte. The surrounding cells appeared also to be glial cells but lacked sufficient detail to be further categorized. This first demonstration of dye-coupling between neocortical glial cells strongly suggests that these cells are connected together via low resistance junctions capable of passing ionic current as well as dye.

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