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. 1999 Jan 1;19(1):274–287. doi: 10.1523/JNEUROSCI.19-01-00274.1999

Fig. 1.

Fig. 1.

Parallel recorded of interneurons and pyramidal cells in the CA1 pyramidal layer. A, Two epochs during slow-wave sleep. B, REM sleep. A, B, Traces, Filtered (upper) and wide-band (lower) traces recorded from one of the tetrodes. Vertical ticks, Action potentials of isolated neurons. Note the clustering of action potentials during sharp wave (SPW)-associated field ripples and the relative paucity of cell discharge between sharp waves (no-SPW). A, Right, A rare case without concomitant pyramidal cell discharge during SPW ripple. Asterisk, Small size ripple. Epochs like this were excluded from the analysis (see Materials and Methods). Positivity is up in this and all subsequent figures. int(p), Three interneurons in the CA1 pyramidal layer; pyr, 15 pyramidal cells recorded by four tetrodes.