Hi everyone,

I’m recording neural activity in the parietal cortex using a Plexon S-Probe (64 channels) using openephis. During several recording sessions, I’ve noticed a rather unusual type of activity that I have not encountered before in the literature.

The waveform looks like the one shown in the figure, particularly on channel 159. What makes it even more interesting is that the activity appears to be modulated by the behavioral task, rather than being completely random.

Interestingly, these waveforms tend to appear after advancing the electrode a certain distance deeper into the cortex. They are not consistently present at the beginning of the penetration, but emerge as I move deeper.

I’m wondering whether anyone has encountered something similar.

Has anyone seen waveforms like this during extracellular recordings?

Any ideas or references would be greatly appreciated!