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. 2018 Oct 10;38(41):8772–8786. doi: 10.1523/JNEUROSCI.1519-18.2018

Figure 1.

Figure 1.

Simultaneous emergence of continuous spontaneous activity modulated during movement in dLGN and VC before the onset of vision. A, Representative spontaneous activity in dLGN and VC of a P10 rat. Simultaneous extracellular recordings were performed from the visual thalamus (dLGN) and the VC in awake, head-fixed Long–Evans rats. MUA (>300 Hz), spike rate of dLGN and VC layer 4, VC LFP (1–150 Hz) and its spectrogram are shown. Periods of movements are detected by thoracic movement (piezo) and neck muscle (EMG) and marked by light red shades. In both dLGN and VC, long-lasting silent periods with very low spike activity are occasionally interrupted with oscillatory spindle-burst activity, largely during periods of quiescence. Note dLGN and VC recordings are not aligned in topographic space; the offset in dLGN and VC bursts likely reflect the spread of a retinal wave across thalamocortex. B, Representative spontaneous activity in dLGN and VC of a P13 rat. Both thalamic and cortical spike activities become continuous. Spike rates are higher during movement in dLGN and VC, where movement is further associated with increased beta and gamma band power in the LFP. Bars represent 5 s, 20 spikes/s and 50 μV.