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Article: Firing properties of GABAergic versus non-GABAergic vestibular nucleus neurons conferred by a differential balance of potassium currents.

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Gittis AH; du Lac S
J. Neurophysiol., 2007



TABLE 2.Voltage-dependent properties of somatic currents


YFP-16 GIN

Itotal (TTX-insensitive)
    v1/2, mV –18.2 ± 3.8 –17.4 ± 6.0
    k, mV 7.1 ± 1.9 8.1 ± 2.8
IKCa (Cd-sensitive)
    v1/2, mV –27.0 ± 4.9 –22.1 ± 5.3**
    k, mV 5.3 ± 2.8 8.2 ± 2.5***
I1TEA (1 mM TEA-sensitive)
    v1/2, mV –9.3 ± 2.4 –7.6 ± 3.2
    k, mV 7.4 ± 1.3 8.2 ± 1.8
I10TEA (10 mM TEA-sensitive)
    v1/2, mV –4.3 ± 5.0 –2.8 ± 4.3
    k, mV 8.6 ± 1.5 9.1 ± 1.6
IA (10 mM TEA-insensitive)
    v1/2, mV –12.5 ± 3.8 –13.3 ± 4.2
    k, mV 10.0 ± 1.4 10.3 ± 2.4

Currents recorded from YFP-16 (n = 20) and GIN (n = 19) neurons, measured by fitting normalized conductance graphs with a Boltzmann fit: gmax/[1 + exp(V1/2V)/k), where gmax is the normalized maximum conductance, V1/2 is the voltage at which half of the channels are open or closed, V is the voltage at which conductance was calculated, corrected for Rseries errors, and k is the slope, a measure of the voltage-dependence of the channel. Averages and standard deviations of V1/2 and k are shown for each current in YFP-16 and GIN neurons. Significant differences are indicated,

** P < 0.01,

*** P < 0.0005.


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