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Article: Transition to seizures in the isolated immature mouse hippocampus: a switch from dominant phasic inhibition to dominant phasic excitation.

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Derchansky M; Jahromi SS; Mamani M; Shin DS; Sik A; Carlen PL
J. Physiol. (Lond.), 2008


Table 1. Electrophysiological characterization of pyramidal, and fast-spiking (FS) and non-FS interneurons

Cell type Pyramidal Non-FS O-LM FS
Trilaminar Basket
The number of recorded neurons (n) and the number of morphologically reconstructed cells (in parentheses). RMP, resting membrane potential; input resistance calculated using linear regression of voltage changes with applied hyperpolarizing current steps (−100 pA, increments of 25 pA). Membrane time constant (τ) was measured by fitting the first 200 ms of the hyperpolarizing voltage step response with an exponential function. Peak frequency was measured as the discharge observed when a step current of 200 pA was applied to the neuron. Adaptation is the ratio of 1 − (number of APs in last 200 ms/number of APs in first 200 ms) during a step current of 200 pA, multiplied by 100. AP width is the duration of the action potential measured at half-amplitude. Values are in s.e.m. *Significant differences in values between FS and non-FS interneurons. All results are shown as mean ± s.e.m.
n 53 (4) 66 (6) 21 (5) 20 (5)
RMP (mV) −68.0 ± 4.0  −62.0 ± 3.0    −62.0 ± 6.0     −63.0 ± 4.0  
Input resistance (MΩ) 260.0 ± 20.0 267.0 ± 20.0* 145.0 ± 10.0 110.0 ± 15.0
Membrane time constant (ms) 40.0 ± 3.0 32.0 ± 3.0* 18.0 ± 3.0 12.0 ± 4.0
Peak frequency (Hz) 15.0 ± 5.0 35.0 ± 4.0* 63.0 ± 2.0 67.0 ± 5.0
Adaptation (%) 40.0 ± 5.0 26.0 ± 3.0* 18.0 ± 4.0 20.0 ± 2.0
AP width (ms)  0.9 ± 0.1   0.8 ± 0.05*   0.5 ± 0.02   0.4 ± 0.01

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Inferred neuron-electrophysiology data values

Neuron Type Neuron Description Ephys Prop Extracted Value Standardized Value Content Source
Other Hippocampus CA1 trilaminar fast spiking interneuron resting membrane potential (mV) -62.0 ± 6.0 (21) -62.0 (mV) Data Table
Hippocampus CA1 basket cell Hippocampus CA1 fast spiking basket cell resting membrane potential (mV) -63.0 ± 4.0 (20) -63.0 (mV) Data Table
Hippocampus CA1 pyramidal cell input resistance (MΩ) 260.0 ± 20.0 (53) 260.0 (MΩ) Data Table
Hippocampus CA1 oriens lacunosum moleculare neuron Hippocampus CA1 oriens lacunosum moleculare non-fast-spiking neuron input resistance (MΩ) 267.0 ± 20.0 (66) 267.0 (MΩ) Data Table
Other Hippocampus CA1 trilaminar fast spiking interneuron input resistance (MΩ) 145.0 ± 10.0 (21) 145.0 (MΩ) Data Table
Hippocampus CA1 basket cell Hippocampus CA1 fast spiking basket cell input resistance (MΩ) 110.0 ± 15.0 (20) 110.0 (MΩ) Data Table
Hippocampus CA1 pyramidal cell membrane time constant (ms) 40.0 ± 3.0 (53) 40.0 (ms) Data Table
Hippocampus CA1 oriens lacunosum moleculare neuron Hippocampus CA1 oriens lacunosum moleculare non-fast-spiking neuron membrane time constant (ms) 32.0 ± 3.0 (66) 32.0 (ms) Data Table
Other Hippocampus CA1 trilaminar fast spiking interneuron membrane time constant (ms) 18.0 ± 3.0 (21) 18.0 (ms) Data Table
Hippocampus CA1 basket cell Hippocampus CA1 fast spiking basket cell membrane time constant (ms) 12.0 ± 4.0 (20) 12.0 (ms) Data Table
Hippocampus CA1 pyramidal cell maximum firing rate (Hz) 15.0 ± 5.0 (53) 15.0 (Hz) Data Table
Hippocampus CA1 oriens lacunosum moleculare neuron Hippocampus CA1 oriens lacunosum moleculare non-fast-spiking neuron maximum firing rate (Hz) 35.0 ± 4.0 (66) 35.0 (Hz) Data Table
Other Hippocampus CA1 trilaminar fast spiking interneuron maximum firing rate (Hz) 63.0 ± 2.0 (21) 63.0 (Hz) Data Table
Hippocampus CA1 basket cell Hippocampus CA1 fast spiking basket cell maximum firing rate (Hz) 67.0 ± 5.0 (20) 67.0 (Hz) Data Table
Hippocampus CA1 pyramidal cell adaptation percent (1 – first/last ISI) 40.0 ± 5.0 (53) 40.0 (ratio) Data Table
Hippocampus CA1 oriens lacunosum moleculare neuron Hippocampus CA1 oriens lacunosum moleculare non-fast-spiking neuron adaptation percent (1 – first/last ISI) 26.0 ± 3.0 (66) 26.0 (ratio) Data Table
Other Hippocampus CA1 trilaminar fast spiking interneuron adaptation percent (1 – first/last ISI) 18.0 ± 4.0 (21) 18.0 (ratio) Data Table
Hippocampus CA1 basket cell Hippocampus CA1 fast spiking basket cell adaptation percent (1 – first/last ISI) 20.0 ± 2.0 (20) 20.0 (ratio) Data Table
Hippocampus CA1 pyramidal cell spike half-width (ms) 0.9 ± 0.1 (53) 0.9 (ms) Data Table
Hippocampus CA1 oriens lacunosum moleculare neuron Hippocampus CA1 oriens lacunosum moleculare non-fast-spiking neuron spike half-width (ms) 0.8 ± 0.05 (66) 0.8 (ms) Data Table
Other Hippocampus CA1 trilaminar fast spiking interneuron spike half-width (ms) 0.5 ± 0.02 (21) 0.5 (ms) Data Table
Hippocampus CA1 basket cell Hippocampus CA1 fast spiking basket cell spike half-width (ms) 0.4 ± 0.01 (20) 0.4 (ms) Data Table
Hippocampus CA1 pyramidal cell resting membrane potential (mV) -68.0 ± 4.0 (53) -68.0 (mV) Data Table
Hippocampus CA1 oriens lacunosum moleculare neuron Hippocampus CA1 oriens lacunosum moleculare non-fast-spiking neuron resting membrane potential (mV) -62.0 ± 3.0 (66) -62.0 (mV) Data Table