首页> 美国卫生研究院文献>eNeuro >Differences in the Electrophysiological Properties of Mouse Somatosensory Layer 2/3 Neurons In Vivo and Slice Stem from Intrinsic Sources Rather than a Network-Generated High Conductance State
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Differences in the Electrophysiological Properties of Mouse Somatosensory Layer 2/3 Neurons In Vivo and Slice Stem from Intrinsic Sources Rather than a Network-Generated High Conductance State

机译:小鼠体感层2/3神经元体内和来自内部来源而不是网络生成的高电导率的切片茎的电生理特性的差异

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摘要

Synaptic activity in vivo can potentially alter the integration properties of neurons. Using recordings in awake mice, we targeted somatosensory layer 2/3 pyramidal neurons and compared neuronal properties with those from slices. Pyramidal cells in vivo had lower resistance and gain values, as well as broader spikes and increased spike frequency adaptation compared to the same cells in slices. Increasing conductance in neurons using dynamic clamp to levels observed in vivo, however, did not lessen the differences between in vivo and slice conditions. Further, local application of tetrodotoxin (TTX) in vivo blocked synaptic-mediated membrane voltage fluctuations but had little impact on pyramidal cell membrane input resistance and time constant values. Differences in electrophysiological properties of layer 2/3 neurons in mouse somatosensory cortex, therefore, stem from intrinsic sources separate from synaptic-mediated membrane voltage fluctuations.
机译:体内的突触活动可能会改变神经元的整合特性。使用清醒小鼠中的录音,我们靶向了体感层2/3锥体神经元,并将神经元特性与切片的神经元特性进行了比较。与切片中的相同细胞相比,体内金字塔形细胞具有更低的抗性和增益值,以及更宽的尖峰和增强的尖峰频率适应性。使用动态钳位将神经元电导增加至体内观察到的水平,并不能减少体内条件和切片条件之间的差异。此外,河豚毒素(TTX)在体内的局部应用阻止了突触介导的膜电压波动,但对锥体细胞膜输入电阻和时间常数值影响很小。因此,小鼠体感皮质中第2/3层神经元电生理特性的差异源于与突触介导的膜电压波动分开的内在来源。

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