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. 1983 Jun;398(1):78-80.
doi: 10.1007/BF00584718.

An N-shaped current-voltage relationship in rat sympathetic neurones

M Galvan, C Sedlmeir

An N-shaped current-voltage relationship in rat sympathetic neurones

M Galvan et al. Pflugers Arch. 1983 Jun.

Abstract

Neurones in the rat isolated superior cervical ganglion were voltage clamped using 2 independent microelectrodes. From a holding potential of -40mV, depolarizing voltage commands to potentials more positive than -20mV elicited outward currents. The current-voltage relationship displayed an N-characteristic with a minimum at +80 to +100mV. Replacement of the external Ca++ ions with Mn++ reversibly abolished a part of the total outward current. The results indicate that rat sympathetic neurones exhibit two potassium currents, a delayed rectifier current and a Ca++-dependent potassium current.

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