Features of the spike afterhyperpolarization (AHP) recorded intracellularly have been analyzed in fast pyramidal tract neurons of cats. Cell input conductance increases during the AHP, possibly because of a change in potassium conductance, as suggested by an AHP equilibrium potential 10-15 mV negative to the resting membrane potential. When more spikes are evoked in succession, AHPs following the first one are strongly reduced in amplitude. The effect is virtually maximal (30-50% of the control) after a single spike and fades out by 200-400 ms after the last spike. At short interspike intervals the initial time course of the depression is hidden by summation occurring between consecutive AHPs.

Properties of the spike afterhyperpolarization in pyramidal tract neurons / F. Baldissera, P. Campadelli, E. Fava, L. Piccinelli. - In: BRAIN RESEARCH. - ISSN 0006-8993. - 259:1(1983), pp. 143-146.

Properties of the spike afterhyperpolarization in pyramidal tract neurons

F. Baldissera
;
P. Campadelli;E. Fava;
1983

Abstract

Features of the spike afterhyperpolarization (AHP) recorded intracellularly have been analyzed in fast pyramidal tract neurons of cats. Cell input conductance increases during the AHP, possibly because of a change in potassium conductance, as suggested by an AHP equilibrium potential 10-15 mV negative to the resting membrane potential. When more spikes are evoked in succession, AHPs following the first one are strongly reduced in amplitude. The effect is virtually maximal (30-50% of the control) after a single spike and fades out by 200-400 ms after the last spike. At short interspike intervals the initial time course of the depression is hidden by summation occurring between consecutive AHPs.
afterhyperpolarization; intracellular recording; potassium conductance; pyramidal tract neurons
Settore BIO/09 - Fisiologia
Settore MED/26 - Neurologia
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/722894
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