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Article: I(h) channels contribute to the different functional properties of identified dopaminergic subpopulations in the midbrain.

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Neuhoff H; Neu A; Liss B; Roeper J
J. Neurosci., 2002


Table 1.

Functional properties of topographically and neurochemically identified SN and VTA DA neurons

DA neurons Soma size (μm) Frequency (Hz) AHP (mV) AP threshold (mV) AP amplitude (mV) Rebound delay (msec) Pacemaker slope (mV/sec) Ihsag (mV)
SN/CB− (n = 69) 28.8  ± 0.82 3.3  ± 0.18 −54.7  ± 0.58 −32.0  ± 1.08 55.8  ± 0.91 269.2  ± 19.41 68.7  ± 3.52 37.3  ± 0.72
SN/CB+ (n = 14) 27.6  ± 1.89 2.4  ± 0.265 −56.3  ± 1.51 −33.1  ± 0.99 59.5  ± 2.34 1262  ± 147.5* 22.7  ± 4.63* 25.3  ± 2.18*
VTA/CB− (n = 21) 26.8  ± 1.17 3.6  ± 0.29 −52.8  ± 1.24 −32.7  ± 0.96 55.6  ± 1.91 632.3  ± 101.3* 37.7  ± 1.02* 31.0  ± 1.72*
VTA/CB+ (n = 21) 20.9  ± 1.02* 5.2  ± 0.63* −45.6  ± 1.68* −30.5  ± 0.96 49.7  ± 2.12* 1563  ± 82.7* 14.8  ± 0.81* 11.9  ± 1.06*
  • Asterisks indicate significant differences in comparison with the respective value of the SN/CB− population (p < 0.0001; ANOVA).


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Inferred neuron-electrophysiology data values

Neuron Type Neuron Description Ephys Prop Extracted Value Standardized Value Content Source
Substantia nigra pars compacta dopaminergic cell Substantia nigra pars compacta calbindin expressing dopaminergic cell cell diameter (μm) 27.6 ± 1.89 (14) 27.6 (um) Data Table
Substantia nigra pars compacta dopaminergic cell Substantia nigra pars compacta calbindin expressing dopaminergic cell firing frequency (Hz) 2.4 ± 0.265 (14) 2.4 (Hz) Data Table
Substantia nigra pars compacta dopaminergic cell Substantia nigra pars compacta calbindin expressing dopaminergic cell AHP voltage (mV) -56.3 ± 1.51 (14) -56.3 (mV) Data Table
Substantia nigra pars compacta dopaminergic cell Substantia nigra pars compacta calbindin expressing dopaminergic cell spike threshold (mV) -33.1 ± 0.99 (14) -33.1 (mV) Data Table
Substantia nigra pars compacta dopaminergic cell Substantia nigra pars compacta calbindin expressing dopaminergic cell spike amplitude (mV) 59.5 ± 2.34 (14) 59.5 (mV) Data Table
Substantia nigra pars compacta dopaminergic cell Substantia nigra pars compacta calbindin expressing dopaminergic cell sag amplitude (mV) 25.3 ± 2.18 (14) 25.3 (mV) Data Table
Substantia nigra pars compacta dopaminergic cell Substantia nigra pars compacta calbindin-negative dopaminergic cell cell diameter (μm) 28.8 ± 0.82 (69) 28.8 (um) Data Table
Ventral tegmental area dopamine neuron Ventral tegmental area calbindin-negative dopaminergic cell cell diameter (μm) 26.8 ± 1.17 (21) 26.8 (um) Data Table
Ventral tegmental area dopamine neuron Ventral tegmental area calbindin-negative dopaminergic cell firing frequency (Hz) 3.6 ± 0.29 (21) 3.6 (Hz) Data Table
Ventral tegmental area dopamine neuron Ventral tegmental area calbindin-negative dopaminergic cell AHP voltage (mV) -52.8 ± 1.24 (21) -52.8 (mV) Data Table
Ventral tegmental area dopamine neuron Ventral tegmental area calbindin-negative dopaminergic cell spike threshold (mV) -32.7 ± 0.96 (21) -32.7 (mV) Data Table
Ventral tegmental area dopamine neuron Ventral tegmental area calbindin-negative dopaminergic cell spike amplitude (mV) 55.6 ± 1.91 (21) 55.6 (mV) Data Table
Ventral tegmental area dopamine neuron Ventral tegmental area calbindin-negative dopaminergic cell sag amplitude (mV) 31.0 ± 1.72 (21) 31.0 (mV) Data Table
Ventral tegmental area dopamine neuron Ventral tegmental area calbindin expressing dopaminergic neuron cell diameter (μm) 20.9 ± 1.02 (21) 20.9 (um) Data Table
Substantia nigra pars compacta dopaminergic cell Substantia nigra pars compacta calbindin-negative dopaminergic cell firing frequency (Hz) 3.3 ± 0.18 (69) 3.3 (Hz) Data Table
Ventral tegmental area dopamine neuron Ventral tegmental area calbindin expressing dopaminergic neuron firing frequency (Hz) 5.2 ± 0.63 (21) 5.2 (Hz) Data Table
Ventral tegmental area dopamine neuron Ventral tegmental area calbindin expressing dopaminergic neuron AHP voltage (mV) -45.6 ± 1.68 (21) -45.6 (mV) Data Table
Ventral tegmental area dopamine neuron Ventral tegmental area calbindin expressing dopaminergic neuron spike threshold (mV) -30.5 ± 0.96 (21) -30.5 (mV) Data Table
Ventral tegmental area dopamine neuron Ventral tegmental area calbindin expressing dopaminergic neuron spike amplitude (mV) 49.7 ± 2.12 (21) 49.7 (mV) Data Table
Ventral tegmental area dopamine neuron Ventral tegmental area calbindin expressing dopaminergic neuron sag amplitude (mV) 11.9 ± 1.06 (21) 11.9 (mV) Data Table
Substantia nigra pars compacta dopaminergic cell Substantia nigra pars compacta calbindin-negative dopaminergic cell AHP voltage (mV) -54.7 ± 0.58 (69) -54.7 (mV) Data Table
Substantia nigra pars compacta dopaminergic cell Substantia nigra pars compacta calbindin-negative dopaminergic cell spike threshold (mV) -32.0 ± 1.08 (69) -32.0 (mV) Data Table
Substantia nigra pars compacta dopaminergic cell Substantia nigra pars compacta calbindin-negative dopaminergic cell spike amplitude (mV) 55.8 ± 0.91 (69) 55.8 (mV) Data Table
Substantia nigra pars compacta dopaminergic cell Substantia nigra pars compacta calbindin-negative dopaminergic cell sag amplitude (mV) 37.3 ± 0.72 (69) 37.3 (mV) Data Table