Horst Obenhaus
@octoscience.bsky.social
PostDoc at the Kavli Institute for Systems Neuroscience at NTNU Trondheim. Whitman Scientist at the Marine Biological Laboratory (MBL) in Woods Hole, MA. I am studying sleep in octopuses and cuttlefish. 🐙
Preeeeetty cool
Our preprint is out! www.biorxiv.org/content/10.1...
Peter Skovorodnikov and I are excited to present FERAL: a new video-understanding toolkit that maps raw video directly to behavior, no pose estimation required.
It works across species, from lab to field, and even in collective systems. (🧵1/n)
Peter Skovorodnikov and I are excited to present FERAL: a new video-understanding toolkit that maps raw video directly to behavior, no pose estimation required.
It works across species, from lab to field, and even in collective systems. (🧵1/n)
FERAL: A Video-Understanding System for Direct Video-to-Behavior Mapping
Animal behavior unfolds continuously in time, yet quantitative analyses often require segmenting it into discrete, interpretable states. Although manual annotation can achieve this, it remains slow, s...
www.biorxiv.org
November 19, 2025 at 9:03 PM
Preeeeetty cool
Reposted by Horst Obenhaus
QQ13: We can functionally identify monosynaptic input cells to the CA3 and DG subfields of the hippocampus by combining transgenic mouse lines, a modified rabies virus, and in vivo imaging with a head-mounted 2-photon miniscope. @rijacobsen.bsky.social
November 18, 2025 at 10:32 PM
QQ13: We can functionally identify monosynaptic input cells to the CA3 and DG subfields of the hippocampus by combining transgenic mouse lines, a modified rabies virus, and in vivo imaging with a head-mounted 2-photon miniscope. @rijacobsen.bsky.social
Reposted by Horst Obenhaus
QQ12: Obenhaus et al. are presenting results on functionally mapping isochronic populations (cells born around the same time during embryonic development) and show how birth date shapes functional properties of cells in MEC! octoscience.bsky.social
November 18, 2025 at 10:32 PM
QQ12: Obenhaus et al. are presenting results on functionally mapping isochronic populations (cells born around the same time during embryonic development) and show how birth date shapes functional properties of cells in MEC! octoscience.bsky.social
Reposted by Horst Obenhaus
QQ2: Where are the grid cells and if so, how many? We find that grid cells form a discrete "hot spot" segregated from other functional cell types in the superficial layers of MEC and PaS. @martipof.bsky.social
November 18, 2025 at 10:32 PM
QQ2: Where are the grid cells and if so, how many? We find that grid cells form a discrete "hot spot" segregated from other functional cell types in the superficial layers of MEC and PaS. @martipof.bsky.social
Reposted by Horst Obenhaus
I have so many issues with this podcast with @earlkmiller.bsky.social . I think that this podcast nicely shows why I have trouble with such approaches. Lets go through some of the claims.
Giant Shoulders podcast: Meet the MIT Neuroscientist Proving Brainwaves are the Secret to Consciousness.
youtu.be/7OFb-NG3jIw
#neuroscience
youtu.be/7OFb-NG3jIw
#neuroscience
Meet the MIT Neuroscientist Proving Brain Waves Are the Secret Engine Behind Consciousness
YouTube video by Giant's Shoulder
youtu.be
November 18, 2025 at 8:05 PM
I have so many issues with this podcast with @earlkmiller.bsky.social . I think that this podcast nicely shows why I have trouble with such approaches. Lets go through some of the claims.
Reposted by Horst Obenhaus
For the first time ever, INSS will have a booth at SfN this year. Please come and say hello at Booth #3327
Would be lovely to see some familiar faces!
Would be lovely to see some familiar faces!
November 6, 2025 at 5:38 PM
For the first time ever, INSS will have a booth at SfN this year. Please come and say hello at Booth #3327
Would be lovely to see some familiar faces!
Would be lovely to see some familiar faces!
Reposted by Horst Obenhaus
I wrote a thing on episodic memory and systems consolidation. I hope you all enjoy it and/or find it interesting.
A neural state space for episodic memories
www.sciencedirect.com/science/arti...
#neuroskyence #psychscisky #cognition 🧪
A neural state space for episodic memories
www.sciencedirect.com/science/arti...
#neuroskyence #psychscisky #cognition 🧪
A neural state space for episodic memories
Episodic memories are highly dynamic and change in nonlinear ways over time. This dynamism is not captured by existing systems consolidation theories …
www.sciencedirect.com
November 3, 2025 at 12:56 PM
I wrote a thing on episodic memory and systems consolidation. I hope you all enjoy it and/or find it interesting.
A neural state space for episodic memories
www.sciencedirect.com/science/arti...
#neuroskyence #psychscisky #cognition 🧪
A neural state space for episodic memories
www.sciencedirect.com/science/arti...
#neuroskyence #psychscisky #cognition 🧪
Reposted by Horst Obenhaus
Huge congratulations to the @BrainGlobe.info team for winning the 2025 International Prize awarded by the @theneuro.bsky.social and Helga Cooper Foundation Open Science Prizes Selection Committee 🎉
www.sainsburywellcome.org/web/research...
www.sainsburywellcome.org/web/research...
October 9, 2025 at 2:11 PM
Huge congratulations to the @BrainGlobe.info team for winning the 2025 International Prize awarded by the @theneuro.bsky.social and Helga Cooper Foundation Open Science Prizes Selection Committee 🎉
www.sainsburywellcome.org/web/research...
www.sainsburywellcome.org/web/research...
Reposted by Horst Obenhaus
Insect spatial memory is thought to be based on panoramic snapshots that are modelled as retinotopic images. This idea won't allow a distinction of landmarks from the scene. Unexpectedly, our data suggest that 🐝 learn 3D-objects as individual landmarks. #neuroethology
www.biorxiv.org/content/10.1...
www.biorxiv.org/content/10.1...
September 28, 2025 at 10:54 AM
Insect spatial memory is thought to be based on panoramic snapshots that are modelled as retinotopic images. This idea won't allow a distinction of landmarks from the scene. Unexpectedly, our data suggest that 🐝 learn 3D-objects as individual landmarks. #neuroethology
www.biorxiv.org/content/10.1...
www.biorxiv.org/content/10.1...
Reposted by Horst Obenhaus
1/8
How can the brain create countless unique memories using a single, universal metric of space? We’ve been waiting for the answer to this for two decades!
Read it here:
www.biorxiv.org/content/10.1...
How can the brain create countless unique memories using a single, universal metric of space? We’ve been waiting for the answer to this for two decades!
Read it here:
www.biorxiv.org/content/10.1...
September 25, 2025 at 4:15 AM
1/8
How can the brain create countless unique memories using a single, universal metric of space? We’ve been waiting for the answer to this for two decades!
Read it here:
www.biorxiv.org/content/10.1...
How can the brain create countless unique memories using a single, universal metric of space? We’ve been waiting for the answer to this for two decades!
Read it here:
www.biorxiv.org/content/10.1...
Reposted by Horst Obenhaus
Excited to release the SPOT grid: a new image set that factorially crosses scene-object & texture-pattern pairings.
We hope these stimuli will be useful to researchers aiming to (partially) disentangle the contributions of lower- and higher-level visual features to behavior & brain activity.
1/
We hope these stimuli will be useful to researchers aiming to (partially) disentangle the contributions of lower- and higher-level visual features to behavior & brain activity.
1/
September 22, 2025 at 7:34 PM
Excited to release the SPOT grid: a new image set that factorially crosses scene-object & texture-pattern pairings.
We hope these stimuli will be useful to researchers aiming to (partially) disentangle the contributions of lower- and higher-level visual features to behavior & brain activity.
1/
We hope these stimuli will be useful to researchers aiming to (partially) disentangle the contributions of lower- and higher-level visual features to behavior & brain activity.
1/
The curtain test! ((:
September 18, 2025 at 5:49 PM
The curtain test! ((:
Reposted by Horst Obenhaus
🚨New preprint alert!
The thalamus has long been seen as a relay of sensory signals to cortex.
But could it also generate its own structured activity?
Our study explores this question in the head-direction (HD) system.
Some explanation 🧵👇 1/13
www.biorxiv.org/content/10.1...
The thalamus has long been seen as a relay of sensory signals to cortex.
But could it also generate its own structured activity?
Our study explores this question in the head-direction (HD) system.
Some explanation 🧵👇 1/13
www.biorxiv.org/content/10.1...
Coherent dynamics of thalamic head-direction neurons irrespective of input
While the thalamus is known to relay and modulate sensory signals to the cortex, whether it also participates in active computation and intrinsic signal generation remains unresolved. The anterodorsal...
www.biorxiv.org
September 16, 2025 at 3:56 PM
🚨New preprint alert!
The thalamus has long been seen as a relay of sensory signals to cortex.
But could it also generate its own structured activity?
Our study explores this question in the head-direction (HD) system.
Some explanation 🧵👇 1/13
www.biorxiv.org/content/10.1...
The thalamus has long been seen as a relay of sensory signals to cortex.
But could it also generate its own structured activity?
Our study explores this question in the head-direction (HD) system.
Some explanation 🧵👇 1/13
www.biorxiv.org/content/10.1...
Come to the MBL in Woods Hole @mblscience.bsky.social for a GRASS FELLOWSHIP @grassfoundation.bsky.social 🦑 🐙🐛
There are two application deadlines this year: Oct 15, 2025 (submit by then to receive feedback on your application!), and Dec 1, 2025 (final deadline). grassfoundation.org/application-...
There are two application deadlines this year: Oct 15, 2025 (submit by then to receive feedback on your application!), and Dec 1, 2025 (final deadline). grassfoundation.org/application-...
September 11, 2025 at 5:56 PM
Come to the MBL in Woods Hole @mblscience.bsky.social for a GRASS FELLOWSHIP @grassfoundation.bsky.social 🦑 🐙🐛
There are two application deadlines this year: Oct 15, 2025 (submit by then to receive feedback on your application!), and Dec 1, 2025 (final deadline). grassfoundation.org/application-...
There are two application deadlines this year: Oct 15, 2025 (submit by then to receive feedback on your application!), and Dec 1, 2025 (final deadline). grassfoundation.org/application-...
Reposted by Horst Obenhaus
Application is open! Come join us and our fantastic line-up of speakers next year in March in Bonn!
September 8, 2025 at 12:00 PM
Application is open! Come join us and our fantastic line-up of speakers next year in March in Bonn!
Reposted by Horst Obenhaus
We just published our third major funding application, including the evaluation it received, for the benefit of future applicants 🙌
Because #OpenScience is also about sharing ideas and examples that others can learn from 🌟
www.ogrants.org/grants/jacob...
Because #OpenScience is also about sharing ideas and examples that others can learn from 🌟
www.ogrants.org/grants/jacob...
Funding application (RCN, 2024): Deciphering bioluminescent communication in marine annelids · Open Grants
www.ogrants.org
September 4, 2025 at 12:45 PM
We just published our third major funding application, including the evaluation it received, for the benefit of future applicants 🙌
Because #OpenScience is also about sharing ideas and examples that others can learn from 🌟
www.ogrants.org/grants/jacob...
Because #OpenScience is also about sharing ideas and examples that others can learn from 🌟
www.ogrants.org/grants/jacob...
Reposted by Horst Obenhaus
Check our new preprint where we examine how enriched experiences alter synaptic connectivity and coding sparsity across the neocortex.
Enriched experience increases reciprocal synaptic connectivity and coding sparsity in higher-order cortex https://www.biorxiv.org/content/10.1101/2025.09.01.673156v1
September 3, 2025 at 2:14 PM
Check our new preprint where we examine how enriched experiences alter synaptic connectivity and coding sparsity across the neocortex.
Impressive design!! Repeatability and precision are shown in sample microscopy stage and by laser->fiber coupling. Check it out.
Open Source Motorized XYZ Micro-Manipulator - Affordable sub µm Motion Control
www.youtube.com/watch?v=MgQb...
Github: github.com/0x23/MicroMa...
Open Source Motorized XYZ Micro-Manipulator - Affordable sub µm Motion Control
www.youtube.com/watch?v=MgQb...
Github: github.com/0x23/MicroMa...
www.youtube.com
August 31, 2025 at 1:02 PM
Impressive design!! Repeatability and precision are shown in sample microscopy stage and by laser->fiber coupling. Check it out.
Open Source Motorized XYZ Micro-Manipulator - Affordable sub µm Motion Control
www.youtube.com/watch?v=MgQb...
Github: github.com/0x23/MicroMa...
Open Source Motorized XYZ Micro-Manipulator - Affordable sub µm Motion Control
www.youtube.com/watch?v=MgQb...
Github: github.com/0x23/MicroMa...
Reposted by Horst Obenhaus
Goal-directed hippocampal theta sweeps during memory-guided navigation https://www.biorxiv.org/content/10.1101/2025.08.26.672489v1
August 27, 2025 at 7:15 AM
Goal-directed hippocampal theta sweeps during memory-guided navigation https://www.biorxiv.org/content/10.1101/2025.08.26.672489v1
Reposted by Horst Obenhaus
One of the “golden videos” that I took during my Grass Fellowship @grassfoundation.bsky.social - active sleep in these little guys is so obvious and flamboyant! @mblscience.bsky.social
🐙 This Octopus shifts from deep to active rest while "dreaming" for #MicroscopyMonday. REM‑like sleep (color bursts and twitches) filmed in real time by Horst Obenhaus @octoscience.bsky.social, currently a 2025 Whitman Fellow at @mblscience.bsky.social. #NESM
#Octopus #Neuro #SleepScience #MBL
#Octopus #Neuro #SleepScience #MBL
July 21, 2025 at 1:52 PM
One of the “golden videos” that I took during my Grass Fellowship @grassfoundation.bsky.social - active sleep in these little guys is so obvious and flamboyant! @mblscience.bsky.social
Reposted by Horst Obenhaus
Our new paper out now in Science explores how neural activity in the lateral entorhinal cortex (LEC) *drifts* over time - and *jumps* at key boundaries - to help organize events in memory.
🔗 www.science.org/doi/10.1126/...
Here's a quick summary of what we found 🧵👇
🔗 www.science.org/doi/10.1126/...
Here's a quick summary of what we found 🧵👇
June 26, 2025 at 6:15 PM
Our new paper out now in Science explores how neural activity in the lateral entorhinal cortex (LEC) *drifts* over time - and *jumps* at key boundaries - to help organize events in memory.
🔗 www.science.org/doi/10.1126/...
Here's a quick summary of what we found 🧵👇
🔗 www.science.org/doi/10.1126/...
Here's a quick summary of what we found 🧵👇
Reposted by Horst Obenhaus
📯We, the Poirazi Lab at IMBB-FORTH, are thrilled to announce an open PhD Student position!
🗝️Key Research Areas: AI, Machine Learning, Brain-Inspired Computing, Neuronal Circuits.
📅Application Deadline: July 7, 2025.
Find out more about the position on our webpage: dendrites.gr?p=2825
🗝️Key Research Areas: AI, Machine Learning, Brain-Inspired Computing, Neuronal Circuits.
📅Application Deadline: July 7, 2025.
Find out more about the position on our webpage: dendrites.gr?p=2825
Join the Poirazi Lab: Open PhD Student position! – Poirazi LabBlueskyEmailFacebookGitHubTwitter
dendrites.gr
June 24, 2025 at 9:49 AM
📯We, the Poirazi Lab at IMBB-FORTH, are thrilled to announce an open PhD Student position!
🗝️Key Research Areas: AI, Machine Learning, Brain-Inspired Computing, Neuronal Circuits.
📅Application Deadline: July 7, 2025.
Find out more about the position on our webpage: dendrites.gr?p=2825
🗝️Key Research Areas: AI, Machine Learning, Brain-Inspired Computing, Neuronal Circuits.
📅Application Deadline: July 7, 2025.
Find out more about the position on our webpage: dendrites.gr?p=2825
Reposted by Horst Obenhaus
New blog post with a review of interesting papers on VIP interneurons in cortex and hippocampus: gcamp6f.com/2025/06/23/i...
Covering work from @koenvervaeke.bsky.social's lab with @mateneubrandt.bsky.social, Yoav Adam's lab and Bernardo Rudy's lab.
Covering work from @koenvervaeke.bsky.social's lab with @mateneubrandt.bsky.social, Yoav Adam's lab and Bernardo Rudy's lab.
June 23, 2025 at 1:04 PM
New blog post with a review of interesting papers on VIP interneurons in cortex and hippocampus: gcamp6f.com/2025/06/23/i...
Covering work from @koenvervaeke.bsky.social's lab with @mateneubrandt.bsky.social, Yoav Adam's lab and Bernardo Rudy's lab.
Covering work from @koenvervaeke.bsky.social's lab with @mateneubrandt.bsky.social, Yoav Adam's lab and Bernardo Rudy's lab.
Reposted by Horst Obenhaus
#neuroskyence folks: as my postdoc grant is running out soon, I am looking for new opportunities in systems neuroscience!
Keywords: patch clamp ephys, opto, mouse behavior, (in vivo) voltage imaging. Would love to return to the Basal Ganglia.
Sharing appreciated, and happy #FluorescenceFriday !
Keywords: patch clamp ephys, opto, mouse behavior, (in vivo) voltage imaging. Would love to return to the Basal Ganglia.
Sharing appreciated, and happy #FluorescenceFriday !
June 13, 2025 at 1:33 PM
#neuroskyence folks: as my postdoc grant is running out soon, I am looking for new opportunities in systems neuroscience!
Keywords: patch clamp ephys, opto, mouse behavior, (in vivo) voltage imaging. Would love to return to the Basal Ganglia.
Sharing appreciated, and happy #FluorescenceFriday !
Keywords: patch clamp ephys, opto, mouse behavior, (in vivo) voltage imaging. Would love to return to the Basal Ganglia.
Sharing appreciated, and happy #FluorescenceFriday !