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  • Title: [Reversal potential of the EPSP of frog motoneurons].
    Author: Kalinina NI, Kurchavyĭ GG, Riabov BT.
    Journal: Neirofiziologiia; 1986; 18(4):534-42. PubMed ID: 3020454.
    Abstract:
    The current-chop technique has shown that I-V characteristic of the membrane are nonlinear in lumbar motoneurons of isolated perfused frog spinal cord. Input resistance of the membrane decreased with depolarization when constant current was applied during 0.1-1.0 s. However, injection of current 40-60 nA during 1-2 min led to an increase of the membrane resistance to the initial value. As a result the membrane potential could be shifted to the positive level up to +50 mV and more. Monosynaptic excitatory postsynaptic potentials evoked by stimulation of the brainstem or by microstimulation of ventrolateral tract fibres were found to reverse completely at a positive level of the membrane potential. In most cases the reversal potentials ranged between 0 mV and -10 mV.
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