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首页> 外文期刊>Journal of Neurophysiology >Populations of striatal medium spiny neurons encode vibrotactile frequency in rats: modulation by slow wave oscillations
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Populations of striatal medium spiny neurons encode vibrotactile frequency in rats: modulation by slow wave oscillations

机译：纹状体中棘神经元群体编码大鼠的触觉频率：慢波振荡的调制

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摘要

Dorsolateral striatum (DLS) is implicated in tactile perception and receives strong projections from somatosensory cortex. However, the sensory representations encoded by striatal projection neurons are not well understood. Here we characterized the contribution of DLS to the encoding of vibrotactile information in rats by assessing striatal responses to precise frequency stimuli delivered to a single vibrissa. We applied stimuli in a frequency range (45-90 Hz) that evokes discriminable percepts and carries most of the power of vibrissa vibration elicited by a range of complex fine textures. Both medium spiny neurons and evoked potentials showed tactile responses that were modulated by slow wave oscillations. Furthermore, medium spiny neuron population responses represented stimulus frequency on par with previously reported behavioral benchmarks. Our results suggest that striatum encodes frequency information of vibrotactile stimuli which is dynamically modulated by ongoing brain state.
机译：背外侧纹状体（DLS）牵涉到触觉，并从体感皮层收到强烈的预测。但是，由纹状体投射神经元编码的感觉表示尚不十分清楚。在这里，我们通过评估纹状体对递送至单个触须的精确频率刺激的反应，来表征DLS对大鼠触觉信息编码的贡献。我们在45-90 Hz的频率范围内施加刺激，这种刺激唤起了可分辨的感觉，并承载了由一系列复杂的细微纹理引起的触须振动的大部分力量。中等的多刺神经元和诱发电位均显示出触觉反应，并受到慢波振荡的调节。此外，中等的多刺神经元群体反应代表了与以前报道的行为基准相当的刺激频率。我们的结果表明，纹状体编码了触觉刺激的频率信息，该信息由持续的大脑状态动态调节。

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