Christian Bénar
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cgbenar.bsky.social
Christian Bénar
@cgbenar.bsky.social
84 followers 36 following 9 posts
Researcher in signal processing for brain mapping (epilepsy and cognition), in EEG, MEG and intracerebral EEG (SEEG). Interested in depth/surface relationships. OPMs are coming!!!
Check our Anywave software
https://meg.univ-amu.fr/wiki/Welcome
Posts Replies Media Videos
Reposted by Christian Bénar
jensfoell.de
Keep an eye on this tech, y’all. I still maintain that this will make fMRI mostly obsolete in the next few years.
neurofractal.bsky.social Rob Seymour @neurofractal.bsky.social · Dec 11
OPMs are going social! First two person data looking promising 🤞
December 11, 2023 at 9:09 PM
Reposted by Christian Bénar
sarangnemo.bsky.social
Svenja Knappe kicks off her lecture in Freiburg. She's been awarded the Carl-Zeiss-Humboldt research prize for her achievements in development of optically pumped magnetometers, particularly for their use in #MEG. Well deserved, herzlichen Glückwunsch Svenja!
#neuroskyence
December 11, 2023 at 5:48 PM
Reposted by Christian Bénar
bidsstandard.bsky.social
We are very happy and proud to be awarded the The Neuro - Irv and Helga Cooper Foundation Open Science Prize.

To paraphrase Yaroslav Halchenko who was in Montreal to receive the prize on behalf of the whole community.

"Standards are the common language of open science!"
November 30, 2023 at 5:37 PM
Reposted by Christian Bénar
bagshaap.bsky.social
There will be plenty of opportunities to come and work at the University of Birmingham in the next few years via the Anniversary Fellows and Chairs scheme: www.birmingham.ac.uk/news/2023/un...
November 27, 2023 at 5:12 PM
Reposted by Christian Bénar
hyojinpark.bsky.social
Multiple competition-based PhD fundings are available using OPM-MEG @thechbh.bsky.social, including BBSRC-funded mibtp (link 👇). Please email me with your CV to discuss details! warwick.ac.uk/fac/cross_fa...
Optimising Neurocognitive Strategies for Efficient Communication in Young and Older Adults using Lar...
warwick.ac.uk
November 20, 2023 at 8:03 PM
Reposted by Christian Bénar
rachelahandley.com
An involuntary twitch in my finger is enough for them to see me. I tremble as I look at them. They have no face, no eyes, only a cold silence. They breed quickly. New ones drag at my hands just as I subdue another one.

I call this story, 'I receive a lot of emails during this time of the year'.
November 14, 2023 at 8:06 PM
Reposted by Christian Bénar
maciekszul.bsky.social
OPM and MEG DORKS (like me) this is my feed about magnetoencephalography, it gathers posts based on keywords too so it can be a little dirty, if you want to, use the 🧠📟 (brain+pager) tag. Picks up the activity of MEGUKI, Biomag and MEGNORD communities.
🧪 🧠🟦 🧠🤖 #neuroimaging

bsky.app/profile/did:...
November 10, 2023 at 10:11 AM
Reposted by Christian Bénar
danielemarinazzo.bsky.social
#neuroscience #neuroskyscience #EEG #MEG #neuroimaging
danielemarinazzo.bsky.social Daniele Marinazzo @danielemarinazzo.bsky.social · Nov 9
The impact of ROI extraction method for MEG connectivity estimation: Practical recommendations for the study of resting state data.

www.sciencedirect.com/science/arti...

A friendly collaboration resulting in nice (and perhaps niche) results. Special thanks to D. Brkic, G. Pellegrino, J. Rasero
We show that ROI-based connectivity maps vary remarkably across strategies in both connectivity magnitude and spatial distribution. Dimensionality reduction procedures conducted after computing connectivity are more similar to each-other, while PCA before approach is the most dissimilar to other approaches. Although differences across methods are consistent across frequency bands, they are influenced by the connectivity metric and ROI size. Greater differences were observed for ciPLV than PLV, and in larger ROIs. Realistic simulations confirmed that after aggregation procedures are generally more accurate but have lower specificity (higher rate of false positive connections). Although computationally demanding, after dimensionality reduction strategies should be preferred when higher sensitivity is desired. Given the remarkable differences across aggregation procedures, caution is warranted in comparing results across studies applying different extraction methods.
November 9, 2023 at 10:22 AM
Reposted by Christian Bénar
goneill.bsky.social
New paper from Tim Tierney, the third of his trilogy denosing OPM-MEG data.

When you pack sensors this close to the brain, SSS has the potential to be an unstable method. Spheroidal harmonics and a smarter projection method may be the answer.

www.biorxiv.org/content/10.1...
Left plot shows how a sphere is inadequate to approximate the brain without it intersecting with nearby OPM sensors. Right plot shows how spheroidal harmonics can generalise to a sphere, but some spherical harmonics do not generalise well to a ellipsoid.
September 18, 2023 at 11:47 AM
cgbenar.bsky.social
First comparison of new #OPM #MEG sensors with classical SQUIDs thanks to simultaneous intracerebral EEG!

www.eneuro.org/content/earl...

#neuroscience
Helium optically pumped magnetometers can detect epileptic abnormalities as well as SQUIDs as shown ...
SQUID-based magnetoencephalography has been shown to improve the diagnosis and surgical treatment decision for presurgical evaluation of drug-resistant epilepsy. Still, its use remains limited due to ...
www.eneuro.org
November 8, 2023 at 7:42 PM