Evidence for an absence of K+ spread in the glomerular layer of the rat olfactory bulb.
Using K+-sensitive microelectrodes inserted into the olfactory bulb, the effects of distant K+ ejection on the extracellular K+ activity (aK), were monitored in the glomerular and plexiform layers. A ouabain-sensitive mechanism, which appeared to be markedly more efficient in the glomerular layer, prevents spread of distal ejected K+. The results are discussed on the basis of Na+,K+-pump activation in both glomerular neuronal networks and the glial capsule enclosing each glomerulus.
Khayari
A
A
Laboratoire de Physiologie Générale II, Université de Nancy-I, France.
Math
F
F
Davrainville
J L
JL
D000818:Animals; D008297:Male; D008564:Membrane Potentials / Q000187:drug effects; D009830:Olfactory Bulb / Q000187:drug effects / Q000201:enzymology / Q000502:physiology*; D010042:Ouabain / Q000494:pharmacology; D011188:Potassium / Q000493:pharmacokinetics / Q000502:physiology*; D051381:Rats; D011919:Rats, Inbred Strains; D000254:Sodium-Potassium-Exchanging ATPase / Q000378:metabolism
D010042:Ouabain; D000254:Sodium-Potassium-Exchanging ATPase; D011188:Potassium