Figure 8.

High-density block recording analysis. Activities of multiple single-units can be identified from high-density block recordings over multiple days. Different colors represent the different single units, which are labeled with numbers. Color shades indicate the different recording days: darker colors indicate early DIVs, lighter colors indicate later DIVs. The colored circles mark the CFA of the respective single units. Rectangles indicate the CFs. Gray squares represent electrode locations. (A) Multiple single-unit activities were distinguished and tracked over different days. The movements of the CFs over days are indicated by the colored arrows. (B) Detailed waveforms of three overlapping single-unit activities (1, 2, and 5 from A) recorded on DIV17 are shown. The spike waveforms of the three single-unit activities can be clearly distinguished based on spike shapes and amplitudes. Examples of waveform separations at the respective CF locations are shown. (C) Tracking of single-unit activities over days. The CFAs of single-unit # 5 are, again, represented by blue circles. Waveforms of single-unit # 5 at three different locations are shown over days, and the CF location is marked by the blue rectangle. The gray dotted lines in the waveform plots indicate the 50% amplitude threshold. Unlabeled scale bars mark 100 μm.