Figure 4
Representative examples for detected signals as well as for high correlation between stimulus presentation and neural activity recorded with the flexible intracortical probes from the barrel cortex and the olfactory bulb. The interspike interval (ISI) distributions and superimposed spike waveforms of isolated spikes for single units (a, e) and multi-units (b, f). Units where less than 1% of the ISIs were below 2.5 ms (red dashed line) were classified as single units. The mean waveforms are represented by the black lines. The LFPs (c, g) and the peri-stimulus time histograms (PSTHs) of unit activity (d, h) in response to tactile (barrel cortex) or odorant (olfactory bulb) stimulations. For the recordings from the barrel cortex (c), the responses are shown by averaging the raw signal over the 50 stimulation trials where as for the olfactory bulb, the raw signal is depicted for one entire stimulation trial (g). The stimulation pulses are represented by grey boxes.
