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Tonically active neuron of the BL nucleus during the sleep–waking cycle. A, ISIHs of neuronal discharges inW, S, and PS with bins of 1 msec (left) and 5 msec (right). Abbreviations as in Figure 2. B, Sample of the activity generated by a tonic neuron in S. Same neuron as in A. The spike train marked by the number 2 in B1 is expanded inB2.
