π¨A busy start of the year for the lab, with another preprint just out in PsyArXiv, with @lenapl.bsky.social's group. Fernando Gonzales Aste goes deep into the potential for neurophys brain imaging with MEG in severe mental illness research & transformation of care.
osf.io/preprints/ps...
01.03.2026 15:40 β
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π¨new lab preprint; brain fingerprinting entirely revisited:
Can we differentiate individuals from just seconds of neurophysiological recordings with machine learning, without resorting to black-box approaches?
In this work, Maxence Lapatrie says 'yes'.
www.biorxiv.org/content/10.6...
17.02.2026 22:26 β
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π‘ Job opp, please repost! How does Director Innovation & Partnership @crchum.bsky.social sound to you? This is a great moment to join a powerful ecosystem at a moment of transition & acceleration in that core mission. DM if interested & for more info. French language proficiency required.
11.02.2026 23:39 β
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Neural Signatures of Post-Decision Outcome Expectation and Evaluation in Human Sensorimotor Choice Behavior
The concept of embodied sensorimotor decision-making proposes that processes implicated in evaluating sensory inputs and selecting appropriate motor actions unfold partly in cortical regions traditionally associated with movement planning and execution. Reinforcement learning models emphasize the role of reward prediction error (RPE) in optimizing action selection based on decision outcome feedback. However, most evidence for the existence of RPE signals locates them in midline frontal and parietal cortex, and comes from tasks with externally manipulated reward probabilities that create artificial prediction errors. Whether RPE signals are expressed in human cortical motor areas during deterministic (non-probabilistic) tasks remains unclear, and would provide further support for embodied decision-making. We used magnetoencephalography (MEG) to study post-decision neural dynamics in a color discrimination task in selected cortical regions of interest (ROIs). Participants had to press buttons with their left or right index finger in response to checkerboard stimuli with different levels of color evidence for the correct choice. Outcomes were fully determined by participants' choices. Delayed auditory feedback veridically indicated whether their hand choice was correct or not. We observed a robust beta-band (15-29 Hz) rebound after correct outcome feedback, strongest in ventral and dorsal premotor, anterior cingulate and superior parietal ROIs as well as occipital and auditory ROIs, and weakest in the primary motor and somatosensory ROIs. Critically, the rebound magnitude after correct feedback scaled inversely with color evidence strength and associated decision error rates. It was minimal in strong-evidence trials (~0.1% errors) and maximal in weak-evidence trials (~34% errors), resembling a context-sensitive positive RPE signal that was strongest when a correct outcome was least expected. Alpha-band (8-12 Hz) post-feedback rebound increases in weak evidence trials were not as strong as in the beta band and appeared mainly in occipital, superior parietal and posterior cingulate ROIs. After the decision but before feedback, both beta and alpha band power showed sensitivity to the level of sensory evidence on which the decisions had been based, with reduced post-movement rebound or enhanced suppression in trials with weak evidence, suggestive of internally generated outcome expectations. Pre-feedback alpha rebound suppression was strongest in occipital, superior parietal and posterior cingulate ROIs. Pre-feedback beta rebound suppression was not as strong. Together, these findings reveal distinct beta- and alpha-band dynamics that reflect internal pre-feedback outcome expectations and feedback-driven RPE-like outcome assessments. They support distributed cortical mechanisms, including premotor, parietal and cingulate regions, in reward expectation, outcome evaluation, and adaptive control, highlighting a role for motor and associative cortices in embodied decision-making, performance monitoring, and flexible behavior under uncertainty. ### Competing Interest Statement The authors have declared no competing interest. Fonds de recherche du QuΓ©bec, https://ror.org/00w3qhf76, FRQ 318042, DOI: https://doi.org/10.69777/318042 NSERC-CREATE: Complex Dynamics of Brain and Behaviour program Canadian Institutes of Health Research, https://ror.org/01gavpb45, CIHR MOP-97944, MOP-142220 [J.K., S.B.]
πΎ First published work of 2026 from the lab.
Congrats to recently graduated Dr Niloofar Gharesi on her study of reward prediction error processes under the co-supervision of Prof John Kalaska at @umontreal-en.bsky.social.
www.biorxiv.org/content/10.6...
@crchum.bsky.social & @theneuro.bsky.social
27.01.2026 22:35 β
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π
17.01.2026 23:02 β
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Please submit your manuscripts to the journal and indicate that youβd like me to be the handling editor.
15.01.2026 10:32 β
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Thank you to @aaas.org for the opportunity to lead a new editorial pod at Science Advances on Systems, Computational, Neuro-AI & Neurotechnology (SCANN).
Top opportunity to highlight outstanding work at the intersection of neuroscience, computation, and emerging technologies. Send your papers now!
15.01.2026 00:26 β
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Please repost: we're hiring!
Apply now! π can-acn.org/professor-re...
06.01.2026 16:56 β
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Redirecting
Very proud to announce that the final chapter of my thesis is now out in Cell Reports! How do neurophysiological traits that characterize individuals evolve across the lifespan? We combined data from over 1,000 individuals aged 4β89 to answer this question. (1/6) π§ πΆπ¦π§π±π©βπ¦±π§ββοΈπ§π΄
doi.org/10.1016/j.ce...
15.12.2025 14:42 β
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17.12.2025 23:07 β
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New paper out today in @cp-cellreports.bsky.social !
15.12.2025 17:36 β
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--
A lot of brains and one big heart tonight at the farewell-to-2025 party of @crchum.bsky.social.
See you in 2026 as we continue moving the lines across the full continuum: research, innovation, better care, and a knowledge-driven, healthier society!
12.12.2025 12:26 β
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Please repost: another kind of Black-Friday deal!
28.11.2025 18:43 β
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This morning, Dr. Drew Weissman delivered an inspiring talk at @crchum.bsky.social, emphasizing the importance of continued curiosity and purpose. π
22.10.2025 14:36 β
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Thousands of researchers. One shared mission: mapping the human brain. ππ§
Join the OHBM community at OHBM 2026 in Bordeaux, France, from June 14β18, 2026.
Together, we advance the science of the human brain.
#OHBM2026 #OHBMCommunity #HumanBrainMapping
06.10.2025 11:02 β
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Today is my first day as Director, Research & Innovation and CRCHUM Research Centre @crchum.bsky.social
(University of Montreal's main Research & Teaching Hospital).
Also starting a new research group @umontreal.ca.
Stay tuned for updates along this new collective journey!
01.10.2025 20:47 β
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Exploring Deep Magnetoencephalography via ThalamoβCortical Sleep Spindles
Results from functional connectivity analyses of MEG data (left) show that many thalamic nuclei can be distinguished via functional connectivity (right). However, results depend on the metric and con...
A fascinating update about how deep and fast MEG noninvasive imaging can be: differentiation b/w thalamus subnuclei, slow vs fast sleep spindles, and the talent and skills of Emily Coffey & her team. Grateful for being aboard this collaborative work.
doi.org/10.1002/hbm....
26.09.2025 19:01 β
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The multimodal sky's the limit now with Brainstorm.
Now featuring PET data integration with electrophysiology and MRI.
neuroimage.usc.edu/brainstorm/T...
Open source, free, for anyone interested (>50,000 users registered so far, >4,500 studies published.)
19.09.2025 19:45 β
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ππΌ
17.09.2025 16:52 β
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Rejoignez ma nouvelle Γ©quipe au @crchum.bsky.social.
Merci de partager!
www.chumontreal.qc.ca/emplois/tech...
17.09.2025 15:36 β
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New study β¨!
βΊ regulates perceptual switches during binocular rivalry:
βΊβ before dominant percepts, β before mixed percepts + PO connectivity shifts from top-down to feedforward after perceptual alternations
Led by Janine Mendola @mcgill.ca, w/ E Mokri & @jasondasilvac.bsky.social
10.09.2025 16:50 β
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