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Article: Hyperexcitability of axotomized and neighboring unaxotomized sensory neurons is reduced days after perineural clonidine at the site of injury.

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Liu B; Eisenach JC
J. Neurophysiol., 2005



TABLE 2.Electrophysiological properties of medium-diameter DRG neurons
Treatment Sham Saline Injured Saline Intact Clonidine Injured Clonidine Intact
Cell size, µm 40.1 ± 1.42 39.6 ± 1.24 39.5 ± 2.17 41.5 ± 1.38 39.8 ± 1.78
    n 27 28 18 23 19
Vm, mV –63.6 ± 1.16 –59.3 ± 0.98* –60.6 ± 1.36 –62.3 ± 0.87# –62.6 ± 1.22
    n 27 28 18 24 19
Voltage threshold, mV –35.0 ± 2.06 –44.5 ± 1.27* –41.3 ± 1.09* –36.9 ± 1.83# –33.2 ± 1.50#
    n 27 28 18 24 19
AP height, mV 64.6 ± 1.86 62.5 ± 1.55 63.3 ± 1.63 60.9 ± 2.04 61.3 ± 1.80
    n 27 28 18 24 19
Rheobase, nA 1.4 ± 0.17 0.5 ± 0.05* 0.8 ± 0.11*§ 0.8 ± 0.12*# 1.2 ± 0.18
    n 27 28 18 24 19
AP-D, ms 1.5 ± 0.13 2.8 ± 0.16* 2.0 ± 0.25*§ 2.1 ± 0.12*# 2.1 ± 0.14*
    n 27 28 18 24 19
AHP, mV 11.3 ± 0.67 9.4 ± 0.65 9.4 ± 1.16 9.0 ± 0.84 11.8 ± 1.34
    n 26 26 18 20 18
AHP-D, ms 3.4 ± 0.39 3.9 ± 0.40 3.3 ± 0.27 3.3 ± 0.23 4.5 ± 0.53
    n 26 26 18 20 18
Rin, Mohm 27.4 ± 3.28 25.2 ± 2.35 27.6 ± 2.88 26.4 ± 2.13 35.3 ± 4.32
    n 27 28 18 23 19
aV/aT r., mV/ms 220.2 ± 12.82 189.5 ± 10.23 192.3 ± 13.69 205.0 ± 15.52 170.8 ± 11.80
    n 24 25 18 24 19
aV/aT f., mV/ms 105.3 ± 6.69 –51.8 ± 3.25* –86.2 ± 8.13§ –63.7 ± 5.70* –69.3 ± 5.25*
    n 26 28 18 24 19
Values, expressed as means ± SE, were obtained from both L4 and L5 dorsal root ganglion medium neurons; n = recorded number of neurons. Cell size is the diameter.

* P < 0.05, PSNL group versus Sham group;

§ P < 0.05, unaxotomized (unaxot) group versus corresponding axotomized (axot) group;

# P < 0.05, clonidine-treated group versus corresponding saline control.


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Inferred neuron-electrophysiology data values

Neuron Type Neuron Description Ephys Prop Extracted Value Standardized Value Content Source
Dorsal root ganglion cell input resistance (Mohm) 27.4 ± 3.28 27.4 (MΩ) Data Table
Dorsal root ganglion cell input resistance (Mohm) 25.2 ± 2.35 25.2 (MΩ) Data Table
Dorsal root ganglion cell input resistance (Mohm) 27.6 ± 2.88 27.6 (MΩ) Data Table
Dorsal root ganglion cell cell diameter 40.1 ± 1.42 40.1 (um) Data Table
Dorsal root ganglion cell input resistance (Mohm) 26.4 ± 2.13 26.4 (MΩ) Data Table
Dorsal root ganglion cell input resistance (Mohm) 35.3 ± 4.32 35.3 (MΩ) Data Table
Dorsal root ganglion cell other (mV/ms) 220.2 ± 12.82 220.2 (None) Data Table
Dorsal root ganglion cell cell diameter 39.6 ± 1.24 39.6 (um) Data Table
Dorsal root ganglion cell other (mV/ms) 189.5 ± 10.23 189.5 (None) Data Table
Dorsal root ganglion cell other (mV/ms) 192.3 ± 13.69 192.3 (None) Data Table
Dorsal root ganglion cell other (mV/ms) 205.0 ± 15.52 205.0 (None) Data Table
Dorsal root ganglion cell other (mV/ms) 170.8 ± 11.8 170.8 (None) Data Table
Dorsal root ganglion cell cell diameter 39.5 ± 2.17 39.5 (um) Data Table
Dorsal root ganglion cell other (mV/ms) 105.3 ± 6.69 105.3 (None) Data Table
Dorsal root ganglion cell other (mV/ms) -51.8 ± 3.25 -51.8 (None) Data Table
Dorsal root ganglion cell other (mV/ms) -86.2 ± 8.13 -86.2 (None) Data Table
Dorsal root ganglion cell other (mV/ms) -63.7 ± 5.7 -63.7 (None) Data Table
Dorsal root ganglion cell other (mV/ms) -69.3 ± 5.25 -69.3 (None) Data Table
Dorsal root ganglion cell cell diameter 41.5 ± 1.38 41.5 (um) Data Table
Dorsal root ganglion cell cell diameter 39.8 ± 1.78 39.8 (um) Data Table
Dorsal root ganglion cell resting membrane potential (mV) -63.6 ± 1.16 -63.6 (mV) Data Table
Dorsal root ganglion cell resting membrane potential (mV) -59.3 ± 0.98 -59.3 (mV) Data Table
Dorsal root ganglion cell resting membrane potential (mV) -60.6 ± 1.36 -60.6 (mV) Data Table
Dorsal root ganglion cell resting membrane potential (mV) -62.3 ± 0.87 -62.3 (mV) Data Table
Dorsal root ganglion cell resting membrane potential (mV) -62.6 ± 1.22 -62.6 (mV) Data Table
Dorsal root ganglion cell spike threshold (mV) -35.0 ± 2.06 -35.0 (mV) Data Table
Dorsal root ganglion cell spike threshold (mV) -44.5 ± 1.27 -44.5 (mV) Data Table
Dorsal root ganglion cell spike threshold (mV) -41.3 ± 1.09 -41.3 (mV) Data Table
Dorsal root ganglion cell spike threshold (mV) -36.9 ± 1.83 -36.9 (mV) Data Table
Dorsal root ganglion cell spike threshold (mV) -33.2 ± 1.5 -33.2 (mV) Data Table
Dorsal root ganglion cell spike amplitude (mV) 64.6 ± 1.86 64.6 (mV) Data Table
Dorsal root ganglion cell spike amplitude (mV) 62.5 ± 1.55 62.5 (mV) Data Table
Dorsal root ganglion cell spike amplitude (mV) 63.3 ± 1.63 63.3 (mV) Data Table
Dorsal root ganglion cell spike amplitude (mV) 60.9 ± 2.04 60.9 (mV) Data Table
Dorsal root ganglion cell spike amplitude (mV) 61.3 ± 1.8 61.3 (mV) Data Table
Dorsal root ganglion cell rheobase (nA) 1.4 ± 0.17 1400.0 (pA) Data Table
Dorsal root ganglion cell rheobase (nA) 0.5 ± 0.05 500.0 (pA) Data Table
Dorsal root ganglion cell rheobase (nA) 0.8 ± 0.11 800.0 (pA) Data Table
Dorsal root ganglion cell rheobase (nA) 0.8 ± 0.12 800.0 (pA) Data Table
Dorsal root ganglion cell rheobase (nA) 1.2 ± 0.18 1200.0 (pA) Data Table
Dorsal root ganglion cell spike width (ms) 1.5 ± 0.13 1.5 (ms) Data Table
Dorsal root ganglion cell spike width (ms) 2.8 ± 0.16 2.8 (ms) Data Table
Dorsal root ganglion cell spike width (ms) 2.0 ± 0.25 2.0 (ms) Data Table
Dorsal root ganglion cell spike width (ms) 2.1 ± 0.12 2.1 (ms) Data Table
Dorsal root ganglion cell spike width (ms) 2.1 ± 0.14 2.1 (ms) Data Table
Dorsal root ganglion cell AHP amplitude (mV) 11.3 ± 0.67 11.3 (mV) Data Table
Dorsal root ganglion cell AHP amplitude (mV) 9.4 ± 0.65 9.4 (mV) Data Table
Dorsal root ganglion cell AHP amplitude (mV) 9.4 ± 1.16 9.4 (mV) Data Table
Dorsal root ganglion cell AHP amplitude (mV) 9.0 ± 0.84 9.0 (mV) Data Table
Dorsal root ganglion cell AHP amplitude (mV) 11.8 ± 1.34 11.8 (mV) Data Table
Dorsal root ganglion cell AHP duration (ms) 3.4 ± 0.39 3.4 (ms) Data Table
Dorsal root ganglion cell AHP duration (ms) 3.9 ± 0.4 3.9 (ms) Data Table
Dorsal root ganglion cell AHP duration (ms) 3.3 ± 0.27 3.3 (ms) Data Table
Dorsal root ganglion cell AHP duration (ms) 3.3 ± 0.23 3.3 (ms) Data Table
Dorsal root ganglion cell AHP duration (ms) 4.5 ± 0.53 4.5 (ms) Data Table