NeuroNexus one-based indexing of probe

[Sietse-k]

Hi,

In the 'automatic wiring tutorial' (https://probeinterface.readthedocs.io/en/main/examples/ex_11_automatic_wiring.html), there is an example wiring of a NeuroNexus electrode ( 'A1x32-Poly3-10mm-50-177' ).

At the bottom of the tutorial it is stated that:

"In this figure we have 2 numbers for each contact:
the upper number “prbXX” is the Neuronexus index (one-based)
the lower “devXX” is the channel on the Intan device (zero-based)

I am wondering how it is possible to start the prbXX indexing at 1 instead of 0? Since this "prbXX" index is automatically generated based on X and Y coordinates (at least when I try to replicate this exact probe).

Any insights would be appreciated,

thanks,

Sietse

[Sietse-k]

Found the solution. You can set it manually using:

probe.annotations['first_index'] = 1
probe.annotations['name'] = 'A1x32-Poly3-10mm-50-177'
probe.annotations['manufacturer'] = 'neuronexus'

for example,

Cheers

[alejoe91]

So in this case the contact id (i.e. the prbXXX) is not automatically generated, but it corresponds to the catalog of NeuroNexus (in this case). In many of these probe catalogs, the contact ids start from "1", but the device channel index has to start from 0, since it corresponds to the index of the trace of that channel (0-based in Python). Hope this makes it clearer! Closing