Juxtacellular and Extracellular hybrid data of same neuron with both devices

This data can be used as ground truth for extracting singe unit spikes from extracellular data recorded from multi-electrode arrays (in this case silicon probes) because in each recording a neuron whose spikes are picked up at above ~ 50 microvolts (sortable) on the extracellular probe are also recorded with a nearby (~20-50 microns) borisilicat glass juxtacellular electrode (i.e. original Pinault method; here functionally similar to cell attached patch in terms of relatively non invasive monitoring of spikes from single cells)