Recording and analysis profiles of neuronal ensembles.

Abstract

<p><b>A</b>. Histological locations (asterisks) of recording electrode tips in the hippocampus. Scale bar indicates 500 μm. <b>B</b>. Waveforms of hippocampal spikes (yellow) and noise signals (whitish-gray) separated by morphology (calibration: 0.2 ms, 100 μV). <b>C</b>. Clusters of single units and noise signals separated according to the first two principal components (PC1 on x-axis; PC2 on y-axis). <b>D</b>. Autocorrelogram of a single unit with an absolute refractory period of a minimum of 2 ms.</p