Hi Phillip,
We have mostly verified the TVB version corresponds to the original JR 1995 paper, and not these more recent results, which require pencil and paper work to check the equations are the same before considering parameters.
But, as a quick guess seeing the figures, there is likely some other parameter which is different here, because those two papers show oscillations for t_e > t_i, which is not the case in TVB by default as you show. It should be straightforward to do a stability analysis in that region to understand which terms stabilize the fixed point in the TVB/JR1995 version and not in the DF & Spiegler versions. We don’t yet have this automated in TVB, though it could be done with e.g. sympy; so this is, as they say, an exercise left to the reader.
Cheers,
Marmaduke
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