If you attend #TRF4 in Tokyo and always wondered how humans represent durations, make sure to check out @grassocamille.bsky.social’s talk on Sunday morning!

Spoiler: Durations are mentally organised along (at least) three interpretable dimensions! More complex structure than we previously assumed.

Using both simulated and actual M/EEG data, we show that this approach substantially outperforms conventional methods in estimating the onset and offset of neural effects, yielding more precise and reliable estimates.

In this paper, we introduce and evaluate the performance of a novel model-based approach relying on Bayesian generalised additive multilevel models.

Recent simulation studies showed that the conventional approach for testing the presence of effects in M/EEG data (cluster-based permutation tests) is unable to recover the precise onset of such effects.

Results from this analysis suggest that motor inhibition may affect either the shape of the latent activation function or the motor execution threshold, with distinct consequences on reaction and movement times.

Overall, these predictions were borne out by movement times, but not reaction times, which differs from previous results obtained using a similar paradigm but pointing movements.

...we introduce a novel statistical method (a multilevel mixture model) based on the distributions of MTs in executed and imagined trials to distinguish participants who were plausibly engaged in the imagery task from those who did not (which seems to work well in our data).

...these effects, we fitted a recent algorithmic model of motor imagery (doi.org/10.1007/s004...). Results from this analysis suggest that motor inhibition may affect different aspects of the latent activation function, with distinct consequences...

...to prevent execution. In this short commentary, we present an algorithmic toy model implementing this proposition (i.e., the threshold upregulation hypothesis) and explore some consequences of this proposition. When formalised in this manner, we show that this hypothesis is incompatible...

New paper out! Available at: rdcu.be/dvSMe

It is often assumed that motor imagery involves the motor system but does not result in execution because of inhibitory mechanisms. One suggested mechanism is that the execution threshold would be "upregulated"...

#psychscisky #neuroskyence

...prevent execution. In this short commentary, we present an algorithmic toy model implementing this proposition (i.e., the threshold upregulation hypothesis) and explore some consequences of this proposition. When formalised in this manner, we show that this hypothesis is incompatible...

To sum up the main results: Inner speaking increases lip cortical excitability more than inner hearing (even after controlling for pre-pulse EMG activity) and this effect is modulated by the phonetic content of what is produced mentally (and is super stable across ppts).

Excited to present my recent, ongoing, and future work on inner speech tomorrow at LPNC (lpnc.univ-grenoble-alpes.fr ), and to discover all the cool projects going on in the lab!

I will be around (in Grenoble) for a few days, so please let me know if you'd like to meet!

... a Bayesian model comparison approach)! These results are consistent with models assuming distinct mechanisms (or neural streams) that may be recruited during (different forms of) inner speech but also suggest that M1 is actively involved during inner speech and beg the question of...

Happy to share that our Stage-2 manuscript has now been accepted at Cortex! The preprint is available at psyarxiv.com/x7emk

In this study, we assessed lip (!) cortical excitability using TMS during inner speaking (imagining producing speech) and inner hearing (imagining hearing speech)...