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Article: Subgroups of parvalbumin-expressing interneurons in layers 2/3 of the visual cortex.

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Helm J; Akgul G; Wollmuth LP
J. Neurophysiol., 2013


Table 2.

Passive and active membrane properties of PV interneuron subgroups

PV1aPV1bPV2PV3Tukey Test
Passive
    Vm, mV-72 ± 2-77 ± 1-77 ± 2-83 ± 11a, 3 2, 3
    Cm, pF20.4 ± 1.220.4 ± 1.119.4 ± 0.618.4 ± 0.8N.D.
    Rm, MΩ84 ± 8129 ± 13104 ± 5213 ± 201a, 3 1b, 3 2, 3
    Rheobase, pA570 ± 60320 ± 30400 ± 20200 ± 201a, 1b 1a, 2 1a, 3 1b, 3 2, 3
AP shape
    AP threshold, mV-25.8 ± 2.4-30.4 ± 1.9-39.5 ± 1.3-42.3 ± 1.41a, 2 1a, 3 1b, 2 1b, 3
    AP peak, mV21.1 ± 2.823.2 ± 2.116.0 ± 2.012.2 ± 2.81b, 3
    AP 1/2-width, ms0.40 ± 0.030.48 ± 0.030.48 ± 0.020.73 ± 0.031a, 3 1b, 3 2, 3
    AHP peak, mV-26.9 ± 1.2-27.0 ± 0.6-23.4 ± 0.5-23.9 ± 0.71a, 2 1b, 2 1b, 3
    AHP latency, ms1.4 ± 0.12.1 ± 0.21.7 ± 0.13.7 ± 0.41a, 3 1b, 3 2, 3
    AHP area, V·s170 ± 20270 ± 10180 ± 10390 ± 401a, 1b 1a, 3 1b, 2 1b, 3 2, 3
Firing pattern
    Delay 1st AP, ms360 ± 130590 ± 60490 ± 60460 ± 60N.D.
    Δ amplitude, mV5.3 ± 1.7-2.2 ± 0.82.2 ± 0.80.7 ± 0.81a, 1b 1a, 3 1b, 2
    ISI average, ms12.9 ± 1.026.8 ± 0.829.5 ± 0.730.5 ± 0.91a, 1b 1a, 2 1a, 3 1b, 3
    Frequency adapt.0.98 ± 0.120.96 ± 0.061.22 ± 0.380.89 ± 0.11N.D.
    Max. inst. freq., Hz95.9 ± 6.045.6 ± 1.666.7 ± 4.443.2 ± 2.01a, 1b 1a, 2 1a, 3 1b, 2 2, 3
    Min. inst. freq., Hz59.5 ± 7.129.0 ± 1.98.6 ± 1.120.4 ± 2.61a, 1b 1a, 2 1a, 3 1b, 2 2, 3
    Max/min inst.1.8 ± 0.32.0 ± 0.513.8 ± 2.64.5 ± 1.51a, 2 1b, 2 2, 3
    CV frequency0.08 ± 0.010.09 ± 0.010.27 ± 0.010.13 ± 0.011a, 2 1b, 2 2, 3
    I/F slope0.6 ± 0.21.5 ± 0.22.4 ± 0.32.1 ± 0.21a, 2 1a, 3 1b, 2
Age, dpn18.1 ± 0.217.3 ± 0.316.2 ± 0.216.4 ± 0.31a, 2 1a, 3 1b, 2
No. of interneurons11223118
    B130351
    PV-tdTomato11192617
  • Values are means ± SE. PV subgroups identified by k-means cluster analysis (k = 4) are characterized by passive membrane properties, action potential (AP) shape, and firing pattern (see materials and methods). Listed are the 17 properties used for clustering plus 2 additional parameters: maximum instantaneous frequency and the maximum-to-minimum instantaneous frequency ratio (Max/Min inst.). Vm, membrane potential; Cm, membrane capacitance; Rm, membrane resistance; AHP, afterhyperpolarization; ISI, interspike interval; CV, coefficient of variation; dpn, postnatal day. ANOVA followed by Tukey test (P < 0.05) was used to identify significant differences between subgroup parameters. N.D., none of the subgroups was significantly different.


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Inferred neuron-electrophysiology data values

Neuron Type Neuron Description Ephys Prop Extracted Value Standardized Value Content Source
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing high-frequency interneuron resting membrane potential (mV) -72.0 ± 2.0 (11) -72.0 (mV) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing interneuron resting membrane potential (mV) -77.0 ± 1.0 (22) -77.0 (mV) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing strongly stuttering interneuron resting membrane potential (mV) -77.0 ± 2.0 (31) -77.0 (mV) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing weakly stuttering interneuron resting membrane potential (mV) -83.0 ± 1.0 (18) -83.0 (mV) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing high-frequency interneuron cell capacitance (pF) 20.4 ± 1.2 (11) 20.4 (pF) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing interneuron cell capacitance (pF) 20.4 ± 1.1 (22) 20.4 (pF) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing strongly stuttering interneuron cell capacitance (pF) 19.4 ± 0.6 (31) 19.4 (pF) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing weakly stuttering interneuron cell capacitance (pF) 18.4 ± 0.8 (18) 18.4 (pF) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing high-frequency interneuron input resistance (MΩ) 84.0 ± 8.0 (11) 84.0 (MΩ) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing interneuron input resistance (MΩ) 129.0 ± 13.0 (22) 129.0 (MΩ) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing strongly stuttering interneuron input resistance (MΩ) 104.0 ± 5.0 (31) 104.0 (MΩ) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing weakly stuttering interneuron input resistance (MΩ) 213.0 ± 20.0 (18) 213.0 (MΩ) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing high-frequency interneuron rheobase (pA) 570.0 ± 60.0 (11) 570.0 (pA) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing interneuron rheobase (pA) 320.0 ± 30.0 (22) 320.0 (pA) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing strongly stuttering interneuron rheobase (pA) 400.0 ± 20.0 (31) 400.0 (pA) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing weakly stuttering interneuron rheobase (pA) 200.0 ± 20.0 (18) 200.0 (pA) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing high-frequency interneuron spike threshold (mV) -25.8 ± 2.4 (11) -25.8 (mV) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing interneuron spike threshold (mV) -30.4 ± 1.9 (22) -30.4 (mV) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing strongly stuttering interneuron spike threshold (mV) -39.5 ± 1.3 (31) -39.5 (mV) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing weakly stuttering interneuron spike threshold (mV) -42.3 ± 1.4 (18) -42.3 (mV) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing high-frequency interneuron spike peak (mV) 21.1 ± 2.8 (11) 21.1 (mV) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing interneuron spike peak (mV) 23.2 ± 2.1 (22) 23.2 (mV) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing strongly stuttering interneuron spike peak (mV) 16.0 ± 2.0 (31) 16.0 (mV) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing weakly stuttering interneuron spike peak (mV) 12.2 ± 2.8 (18) 12.2 (mV) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing high-frequency interneuron spike width (ms) 0.4 ± 0.03 (11) 0.4 (ms) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing interneuron spike width (ms) 0.48 ± 0.03 (22) 0.48 (ms) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing strongly stuttering interneuron spike width (ms) 0.48 ± 0.02 (31) 0.48 (ms) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing weakly stuttering interneuron spike width (ms) 0.73 ± 0.03 (18) 0.73 (ms) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing high-frequency interneuron AHP voltage (mV) -26.9 ± 1.2 (11) -26.9 (mV) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing interneuron AHP voltage (mV) -27.0 ± 0.6 (22) -27.0 (mV) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing strongly stuttering interneuron AHP voltage (mV) -23.4 ± 0.5 (31) -23.4 (mV) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing weakly stuttering interneuron AHP voltage (mV) -23.9 ± 0.7 (18) -23.9 (mV) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing high-frequency interneuron AHP duration (ms) 1.4 ± 0.1 (11) 1.4 (ms) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing interneuron AHP duration (ms) 2.1 ± 0.2 (22) 2.1 (ms) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing strongly stuttering interneuron AHP duration (ms) 1.7 ± 0.1 (31) 1.7 (ms) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing weakly stuttering interneuron AHP duration (ms) 3.7 ± 0.4 (18) 3.7 (ms) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing high-frequency interneuron first spike latency (ms) 360.0 ± 130.0 (11) 360.0 (ms) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing interneuron first spike latency (ms) 590.0 ± 60.0 (22) 590.0 (ms) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing strongly stuttering interneuron first spike latency (ms) 490.0 ± 60.0 (31) 490.0 (ms) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing weakly stuttering interneuron first spike latency (ms) 460.0 ± 60.0 (18) 460.0 (ms) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing high-frequency interneuron adaptation ratio (last/first ISI) 0.98 ± 0.12 (11) 0.98 (ratio) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing interneuron adaptation ratio (last/first ISI) 0.96 ± 0.06 (22) 0.96 (ratio) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing strongly stuttering interneuron adaptation ratio (last/first ISI) 1.22 ± 0.38 (31) 1.22 (ratio) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing weakly stuttering interneuron adaptation ratio (last/first ISI) 0.89 ± 0.11 (18) 0.89 (ratio) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing high-frequency interneuron maximum firing rate (Hz) 95.9 ± 6.0 (11) 95.9 (Hz) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing interneuron maximum firing rate (Hz) 45.6 ± 1.6 (22) 45.6 (Hz) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing strongly stuttering interneuron maximum firing rate (Hz) 66.7 ± 4.4 (31) 66.7 (Hz) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing weakly stuttering interneuron maximum firing rate (Hz) 43.2 ± 2.0 (18) 43.2 (Hz) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing high-frequency interneuron FI slope 0.6 ± 0.2 (11) 0.6 (Hz/nA) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing continuous-firing interneuron FI slope 1.5 ± 0.2 (22) 1.5 (Hz/nA) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing strongly stuttering interneuron FI slope 2.4 ± 0.3 (31) 2.4 (Hz/nA) Data Table
Neocortex interneuron deep Visual Cortex layer 2/3 parvalbumin-expressing weakly stuttering interneuron FI slope 2.1 ± 0.2 (18) 2.1 (Hz/nA) Data Table