全细胞记录从opto-tagged msn的DLS清醒小鼠的行为。实验装置的示意图。全细胞记录进行的鼠标DLS optopatcher在线optogenetic分类,同时LFP在S1录音。胡须被刺激同侧和对侧的空气供给独立交付给胡须,和搅拌行为是使用非接触式红外LED-photodiode监控。获得了b Opto-tagging msn使用D1-ChR2-YFP(标签dMSNs(左)或D2-ChR2-YFP(标签iMSNs,右)小鼠(n = 15老鼠D1, n = 19老鼠D2)。典型的预测从D1-ChR2-YFP老鼠dMSNs信噪比和从iMSNs GPe D2-ChR2-YFP老鼠是显而易见的。规模的酒吧,1毫米。c显示全细胞和LFP记录位置示意图表示前囱(左)。图像和放大插图(右)显示一个例子(从34个独立神经元相似的结果)的biocytin-filled MSN DLS体内全细胞记录在一个行为之后鼠标。插图显示了相同的细胞在更高的放大倍数。 d Opto-tagging of MSNs using the optopatcher. Depolarizing responses to photostimulation of a positive cell (ChR2 + ) in D1-ChR2-YFP mouse (top) for the duration of the stimulation. Negative cells (ChR2 − , bottom) did not respond with depolarization to photostimulation. e Example of spontaneous membrane potential activity in an opto-tagged iMSN, whole-cell recorded in the DLS of an awake behaving mouse. Membrane potential (Vm, red) of the neuron was recorded simultaneously with measurement of whisker activity (Whisker, green), air puff stimulation indicated in gray (ipsi/contra). f Synaptic responses of the neuron showed in e, to contra- and ipsilateral whisker deflection. g Depolarization of the membrane potential preceded whisker movement in the same neuron showed in e. h Venn diagram showing the number of MSNs responding to whisker stimulation (turquoise circle) and to spontaneous whisking movement (pink circle) or absence of both (red circle). LFP Local Field Potential, Barrel field somatosensory cortex S1, IR infrared light, SNr Substantia Nigra pars reticulata, GPe Globus Pallidus externa, Ctx Cortex, WM White Matter, St Striatum, ChR2 Channelrhodopsin, a.u. arbitrary units. Credit:自然通讯(2023)。DOI: 10.1038 / s41467 - 023 - 36648 - 0
卡罗林斯卡医学院的研究人员一直在关注运动如何塑造我们的感官和感觉和运动过程都是如何影响帕金森病。在发表的一项研究自然通讯de la Torre-Martinez et al,表明运动减少了对感觉输入的反应,感觉和运动过程都改变了帕金森病的动物模型。