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Maarten C. Ottenhoff @mottenhoff.bsky.social · 25d

Just learned I was nominated for this years #BCIAward! 🏆
We created a bimanual iBCI that enabled simultaneous neural control of two cursors on the first day of use.

www.bci-award.com/Home

BCI Award: Submit now!

The Annual BCI Award, endowed with 3,000 USD, is one of the top accolades in BCI research.

www.bci-award.com

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Maarten C. Ottenhoff @mottenhoff.bsky.social · Sep 6

Check out our latest speech work!

mverwoert.bsky.social @mverwoert.bsky.social · Sep 5

Can we move beyond the motor cortex for speech neuroprosthetics? We've explored just this question in our paper published today in Cell Reports!🧠
Check it out! 👉https://sciencedirect.com/science/article/pii/S2211124725010125

Moving beyond the motor cortex: A brain-wide evaluation of target locations for intracranial speech neuroprostheses

Speech brain-computer interfaces (BCIs) offer a solution for those affected by speech impairments by decoding brain activity into speech. Current neur…

sciencedirect.com

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Reposted by Maarten C. Ottenhoff

Karolinska Institutet @ki.se · Jun 25

Applications are now open! We are recruiting 20 Assistant Professors in a wide range of subject areas. We're looking for early-career researchers with strong scientific merits and future potential.
🔗 All positions: ki.se/en/about-ki/...

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Reposted by Maarten C. Ottenhoff

Mushtaq Bilal, PhD @mushtaqbilalphd.bsky.social · Aug 14

Elsevier's profit margin compared to Apple, Google, and Microsoft

Apple: 28%
Google: 25%
Microsoft: 34%

Elsevier: 37% with a revenue of $3.9 billion.

Elsevier's payment to academic authors and reviewers: $0

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Maarten C. Ottenhoff @mottenhoff.bsky.social · Jun 12

Last night, I was invited to @nporadio1.bsky.social / NTR to talk (in Dutch) about my work to restore movement and communication using brain-computer interfaces. We had a one hour chat, followed by 30 minutes of listener calls. It was a blast!

www.nporadio1.nl/fragmenten/d...

Bewegen na een verlamming: het kan, dankzij deze technologie

Het is moeilijk voor te stellen hoe het is om verlamd te zijn. Maar verlamde mensen kunnen zich dankzij de wetenschap wel steeds meer voorstellen hoe het is om te bewegen. Sterker nog: dat kan daadwer...

www.nporadio1.nl

Maarten C. Ottenhoff @mottenhoff.bsky.social · Mar 27

Vanochtend was ik te gast bij 'De nacht van de wetenschap' op @nporadio1.bsky.social. Luister het hieronder terug!

Door computers weer bewegen met een verlamming

Het brein kan bij verlamming nog volledig intact zijn. Maarten Ottenhoff doet onderzoek naar computers die signalen in dat brein lezen en vetalen. Waardoor mensen met ALS weer kunnen praten of mensen ...

www.nporadio1.nl

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Maarten C. Ottenhoff @mottenhoff.bsky.social · Mar 25

In any case, I have officially awarded myself with best poster🏆

Maarten C. Ottenhoff @mottenhoff.bsky.social · Mar 25

Can we stop handing out useless awards like poster awards? When is the last time you heard any criteria for the award OR an explanation why a poster has won? Let's stop pretending an arbitrary decision is a measure of excellence.

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Reposted by Maarten C. Ottenhoff

Christian Herff @cherff.bsky.social · Mar 14

Maxime Verwoert's paper on different representations of speech production in distributed intracranial recordings of neural activity is now published:
www.nature.com/articles/s42...

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Reposted by Maarten C. Ottenhoff

Nanthia Suthana @suthanalab.bsky.social · Mar 10

🚨 New lab paper!🚨

A dream study of mine for nearly 20 yrs not possible until now thanks to NIH 🧠 funding & 1st-author lead @seeber.bsky.social

We tracked hippocampal activity as people walked memory-guided paths & imagined them again. Did brain patterns reappear?🧵👇

www.nature.com/articles/s41...

Human neural dynamics of real-world and imagined navigation - Nature Human Behaviour

Seeber et al. studied brain recordings from implanted electrodes in freely moving humans. Neural dynamics encoded actual and imagined routes similarly, demonstrating parallels between navigational, im...

www.nature.com

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Reposted by Maarten C. Ottenhoff

Andreas Horn @andreashorn.org · Feb 17

I am hiring: PhD students, postdocs, admin personnel. Email me if you know somebody that may be interested in joining us in Cologne! 👇👇

Please RT for reach! 🙏🙏

Andreas Horn @andreashorn.org · Feb 17

I am excited to announce that I will be founding an institute for network stimulation at the University Hospital Cologne – already this coming May!

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Maarten C. Ottenhoff @mottenhoff.bsky.social · Feb 14

Thanks for your kind response. Do you think these brain-wide activation could be related to the action-mode network? The AMN seems to be a global state in order to plan goal-direction behavior.

Maarten C. Ottenhoff @mottenhoff.bsky.social · Feb 11

We'd love to hear your thoughts!

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Maarten C. Ottenhoff @mottenhoff.bsky.social · Feb 10

Glad you like it! Note that this work is from my PhD work which I did at neuralinterfacinglab.github.io . I am currently a postdoc a BrainGate working on new projects on movement decoding using microelectrode arrays in the motor cortex!

Neural Interfacing Lab at Maastricht University

Welcome to the Neural Interfacing Lab in the Department for Neurosurgery at Maastricht Univers...

neuralinterfacinglab.github.io

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Maarten C. Ottenhoff @mottenhoff.bsky.social · Feb 10

And finally, science is a team-effort. We are incredible thankful for all collaborators providing their input and expertise, the invaluable staff at Kempenhaeghe and our participants for providing their time and effort.

Maarten C. Ottenhoff @mottenhoff.bsky.social · Feb 10

We are excited about this work and hope you enjoy reading it. As we always do in our lab, we share code and data publicly. Please find the code here: github.com/mottenhoff/d.... We'll make the data available at publication.

GitHub - mottenhoff/decoding-continuous-goal-directed-movements

Contribute to mottenhoff/decoding-continuous-goal-directed-movements development by creating an account on GitHub.

github.com

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Maarten C. Ottenhoff @mottenhoff.bsky.social · Feb 10

Moreover, our results suggest that goal-directed movement in the brain is represented in relationship to that goal. Current brain-computer interfaces do already use this goal-directed reference frame to calibrate decoders. However, it does require knowledge of the location of the goal.

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Maarten C. Ottenhoff @mottenhoff.bsky.social · Feb 10

Our results provide a comprehensive overview of the decodable movement-related information in brain-wide neural activity, and strengthen our previous results that the whole brain may be involved in generating movement.

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Maarten C. Ottenhoff @mottenhoff.bsky.social · Feb 10

In this work, the decoder reached the highest performance using low frequency activity. The phase information is important, as the performance was substantially lower when we used the power. This neural signal shares similarities with the local motor potential described in M1.

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Maarten C. Ottenhoff @mottenhoff.bsky.social · Feb 10

About the decoding of the directional kinematics. It turns out that if we change the reference frame from the sensor to a goal-directed reference frame, the decoder is able the position w.r.t the target above chance!

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Maarten C. Ottenhoff @mottenhoff.bsky.social · Feb 10

If we look at the electrode contact locations that were significantly correlated with hand movement speed, we observe that these contacts are located throughout the brain, including cortical and subcortical structures.

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Maarten C. Ottenhoff @mottenhoff.bsky.social · Feb 10

We found that non-directional hand movement speed can be decoded using low, mid and high frequency information. Particularly, the low frequency activity reached substantial decoding performance (up to 0.76 + 0.03). Directional hand kinematics seemed not decodable.

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Maarten C. Ottenhoff @mottenhoff.bsky.social · Feb 10

We extracted low frequency activity (< 5 HZ), mid frequency power (8 - 30 Hz) and high-frequency power (55 - 200 Hz), windowed the data (300ms length, 50ms shift), and used preferential subspace identification (PSID) to decode 12 kinematics.

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Maarten C. Ottenhoff @mottenhoff.bsky.social · Feb 10

To investigate, we recorded 3D hand movement trajectory while our participants played a custom game from which we retrieved position, velocity, speed and acceleration. At the same time we recorded neural activity from cortical and sub-cortical brain areas.

3D figure showing the movement trajectory as blue line and captured targets as gold circles

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Maarten C. Ottenhoff @mottenhoff.bsky.social · Feb 10

In previous work, we described how movement can be decoded from brain-wide neural activity, across tasks and across participants. However, this was only decoding between move and rest, so naturally we wanted to know more about the neural content of these brain-wide dynamics.

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