Tootfinder

Orbitofrontal cortex drives predictive filtering of sensory responses (in mice) https://www.nature.com/articles/s41593-026-02217-z "After daily sound exposure, neural habituation in the primary auditory cortex (A1) was reversed by inactivating the OFC."

Orbitofrontal cortex drives predictive filtering of sensory responses - Nature Neuroscience
Top-down projections from the orbitofrontal cortex carry predictive signals that grow with sound experience and suppress the auditory cortex via inhibitory circuits, revealing a predictive mechanism for sensory habituation.

from my link log —
Arm's Cortex X925: reaching desktop performance.
https://chipsandcheese.com/p/arms-cortex-x925-reaching-desktop
saved 2026-03-03

Arm's Cortex X925: Reaching Desktop Performance
A big, high performance core from Arm

Snowflake and OpenAI agree to a multi-year, $200M partnership to integrate OpenAI's models into Snowflake Cortex AI and the Snowflake Intelligence agent (Sabrina Ortiz/The Deep View)
https://www.thedeepview.com/articles/snowflake-lands-usd200m-openai-partn…

Snowflake lands $200M OpenAI partnership
Snowflake has established itself as a top data cloud provider. Now, it’s partnering with OpenAI to bring AI-powered data insights to users. On Monday...

macaque_neural: Macaque cortical connectivity (Young)
A network of cortical regions in the Macaque cortex.
This network has 47 nodes and 505 edges.
Tags: Biological, Connectome, Unweighted
https://networks.skewed.de/net/macaque_neural
Ridiculogram:

Optimal interphase delay in biphasic current pulses facilitates neural circuit activation induced by microstimulation in the mouse visual cortex https://www.frontiersin.org/journals/neuroscience/articles/10.3389/fnins.2025.1710221/full

Frontiers | Optimal interphase delay in biphasic current pulses facilitates neural circuit activation induced by microstimulation in the mouse visual cortex
Cathodic-first biphasic current pulses are commonly employed in intracortical microstimulation. Due to the intricate arrangement of axons, somata, and dendri...

#LaVCa: LLM-assisted visual cortex captioning https://arxiv.org/abs/2502.13606 using "large language models (LLMs) to generate natural-language captions for images to which voxels are selective"; to be presented a…

LaVCa: LLM-assisted Visual Cortex Captioning
Understanding the property of neural populations (or voxels) in the human brain can advance our comprehension of human perceptual and cognitive processing capabilities and contribute to developing brain-inspired computer models. Recent encoding models using deep neural networks (DNNs) have successfully predicted voxel-wise activity. However, interpreting the properties that explain voxel responses remains challenging because of the black-box nature of DNNs. As a solution, we propose LLM-assiste…

macaque_neural: Macaque cortical connectivity (Young)
A network of cortical regions in the Macaque cortex.
This network has 47 nodes and 505 edges.
Tags: Biological, Connectome, Unweighted
https://networks.skewed.de/net/macaque_neural
Ridiculogram:

macaque_neural: Macaque cortical connectivity (Young)
A network of cortical regions in the Macaque cortex.
This network has 47 nodes and 505 edges.
Tags: Biological, Connectome, Unweighted
https://networks.skewed.de/net/macaque_neural
Ridiculogram:

Renewed work toward a visual prosthesis (brain implant) in the #LGN instead of visual cortex https://nin.nl/news/first-ever-recording-of-a-crucial-visual-structure-in-the…

Neuroscience produces more data every year: more neurons mapped, more proteins identified. Yet the fundamental questions remain unanswered. We're creating puzzle pieces without knowing what image they're meant to form.
https://ocrampal.com/the-puzzle-in-neuroscience/

The Puzzle Without a Picture: Why Geneosophy is Needed
The metaphor of the puzzle can be applied to any science, though it becomes particularly vivid in neuroscience. In neuroscience, we work with a multitude of objects considered central to the field: neurons, brain structures such as the cortex, hippocampus, and basal ganglia; and, at a smaller scale, neurotransmitters, proteins,

@…
Ich habe nichts darüber gelesen. Es ist aber von 261 Softwarekomponenten die rede. Ich gehe davon aus, dass es in einem Zug auch eine grosse Anzahl Prozessoren hat. Ich nehme an einige ARM Cortex Modelle, x86 oder vielleicht sogar ältere ARM 7/9/11 wie XScale oder sogar SPARC oder PPC. Und sicher auch ein oder zwei 8-bit controller. Aber das ist nur gerate…

An electrode-based #Neuralink #Blindsight brain implant in visual cortex will not scale to large numbers of blind patients nor to normal-like vision beyond showing a few rough edges

macaque_neural: Macaque cortical connectivity (Young)
A network of cortical regions in the Macaque cortex.
This network has 47 nodes and 505 edges.
Tags: Biological, Connectome, Unweighted
https://networks.skewed.de/net/macaque_neural
Ridiculogram:

You see a detective on the TV and he’s interviewing all the suspects asking them what they were doing on the night of the murder a month ago last Tuesday night.
And on the TV, the suspects all know. Right away.
If you asked me ten years ago though, I’d have had barely any clue. If you’re lucky it’d have been something planned in my calendar but mostly, dunno. Watching TV maybe? No idea what show. Was that a night I was in the pub?
As we all get older this problem increases I’m told. Eventually full on senility sets in.
But what if you have already built the habit to record what you’re doing? To be able to look back and revise and review how you spent your days? An external aid as a crutch to your own forgetful brain’s cortex?
So I started this Exocortex Log over a decade ago and now I can answer: Ten years ago on Tuesday I was having dinner with the guitarist from my band and his girlfriend and they burned the pudding.
The app has been half finished and barely able to even record let alone review for most of that time, but now it’s ready enough that someone else might use it too if they want.
Try it out: #lifeLog #app #memoryAid

The Third Visual Pathway for Social Perception
David Pitcher
https://arxiv.org/abs/2512.09351 https://arxiv.org/pdf/2512.09351 https://arxiv.org/html/2512.09351
arXiv:2512.09351v1 Announce Type: new
Abstract: Influential models of primate visual cortex describe two functionally distinct pathways: a ventral pathway for object recognition and the dorsal pathway for spatial and action processing. However, recent human and non-human primate research suggests the existence of a third visual pathway projecting from early visual cortex through the motion-selective area V5/MT into the superior temporal sulcus (STS). Here we integrate anatomical, neuroimaging, and neuropsychological evidence demonstrating that this pathway specializes in processing dynamic social cues such as facial expressions, eye gaze, and body movements. This third pathway supports social perception by computing the actions and intentions of other people. These findings enhance our understanding of visual cortical organization and highlight the STS's critical role in social cognition, suggesting that visual processing encompasses a dedicated neural circuit for interpreting socially relevant motion and behavior.
toXiv_bot_toot

Aw man. I mean, load of pros use it, so it's probably fine but that's $1500 gamble.
#GearSquad #Guitar #GuitarPedal

(Flashback, 2012) Real-life science closes in on Star Trek as scientists show they can to hack into blind people's visual cortex to let them 'see' https://www.dailymail.co.uk/sciencetech/ar

Real-life science closes in on Star Trek: TNG with new device to hack into blind people's visual cortex to let them 'see'
he Sensory Substitution Device, which uses an algorithm to translate visual data into sound, can actually activate the visual cortices of congenitally blind people, giving them the opportunity to see.

macaque_neural: Macaque cortical connectivity (Young)
A network of cortical regions in the Macaque cortex.
This network has 47 nodes and 505 edges.
Tags: Biological, Connectome, Unweighted
https://networks.skewed.de/net/macaque_neural
Ridiculogram:

Universal scale-free representations in human visual cortex https://journals.plos.org/ploscompbiol/article?id=10.1371/journal.pcbi.1013714 "revealing a universal high-dimensional spectrum of visual information that emerges despite individual differenc…

Universal scale-free representations in human visual cortex
Author summary The human cerebral cortex is thought to encode sensory information in population activity patterns, but the statistical structure of these population codes has yet to be characterized. By examining large-scale neuroimaging recordings of human vision using a spectral approach more common in physics than neuroscience, we reveal the universal scale-free structure of population codes in visual cortex, which is found in all subjects and at multiple stages of visual processing. Moreove…

Ok this is fucking cool, even though I don't want it
#Music #Recording #Guitar #GearSquad

Quad Cortex mini
No compromises. Just smaller.

State and Parameter Estimation for a Neural Model of Local Field Potentials
Daniele Avitabile, Gabriel J. Lord, Khadija Meddouni
https://arxiv.org/abs/2512.07842 https://arxiv.org/pdf/2512.07842 https://arxiv.org/html/2512.07842
arXiv:2512.07842v1 Announce Type: new
Abstract: The study of cortical dynamics during different states such as decision making, sleep and movement, is an important topic in Neuroscience. Modelling efforts aim to relate the neural rhythms present in cortical recordings to the underlying dynamics responsible for their emergence. We present an effort to characterize the neural activity from the cortex of a mouse during natural sleep, captured through local field potential measurements. Our approach relies on using a discretized Wilson--Cowan Amari neural field model for neural activity, along with a data assimilation method that allows the Bayesian joint estimation of the state and parameters. We demonstrate the feasibility of our approach on synthetic measurements before applying it to a dataset available in literature. Our findings suggest the potential of our approach to characterize the stimulus received by the cortex from other brain regions, while simultaneously inferring a state that aligns with the observed signal.
toXiv_bot_toot

macaque_neural: Macaque cortical connectivity (Young)
A network of cortical regions in the Macaque cortex.
This network has 47 nodes and 505 edges.
Tags: Biological, Connectome, Unweighted
https://networks.skewed.de/net/macaque_neural
Ridiculogram:

Neurons in auditory cortex integrate information within a constrained and context-invariant temporal window (in ferret auditory cortex) https://www.cell.com/current-biology/fulltext/S0960-9822(25)01479-4 integration windows in human auditory cortex "range from a…

From single scenes to extended scenarios: The role of the ventromedial prefrontal cortex in the construction of imagery-rich events https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0324764 "perceptual representations in the posterior neoco…

From single scenes to extended scenarios: The role of the ventromedial prefrontal cortex in the construction of imagery-rich events
Mental events are fundamental to daily cognition, including the recollection of past experiences, the anticipation of future scenarios, and engagement in imaginative, fictitious thought. Typically, these temporally extended mental events unfold within coherent spatial contexts, rich in naturalistic scenes and objects. However, there remains a significant gap in understanding how these events are represented in the brain. This study aimed to investigate the neural patterns involved in the constr…

macaque_neural: Macaque cortical connectivity (Young)
A network of cortical regions in the Macaque cortex.
This network has 47 nodes and 505 edges.
Tags: Biological, Connectome, Unweighted
https://networks.skewed.de/net/macaque_neural
Ridiculogram:

To flexibly organize thought, the brain makes use of space https://news.mit.edu/2026/to-flexibly-organize-thought-the-brain-makes-use-of-space-0120

To flexibly organize thought, the brain makes use of space
MIT researchers tested their theory of spatial computing, which holds that the brain recruits and controls ad hoc groups of neurons for cognitive tasks by applying brain waves to patches of the cortex.

The neural organization of visual information in the auditory cortex of the congenitally deaf https://onlinelibrary.wiley.com/doi/10.1002/hbm.70444 "visual spatial information is represented in the auditory cortex of congenital deaf individuals through deactivation signals&qu…

The adjacent case https://barnes7.substack.com/p/the-adjacent-case "What is it like to be blind?", "The label 'visual cortex' names a developmental default, not a functional destiny", "Sensory substitution sharpens the point."

Beyond Nagel & Chalmers: Echolocation and Consciousness
Philosopher Barnes argues Daniel Kish's echolocation rewrites the hard problem of consciousness | Beyond Nagel and Chalmers.

A mesoscale optogenetics system for precise and robust stimulation of the primate cortex https://www.cell.com/neuron/abstract/S0896-6273(25)00928-6 "enables flexible million-pixel stimulation over a centimeter-sized area of the primate cortex." visual prosthesis

Prefrontal scaling of reward prediction error readout gates reinforcement-derived adaptive behavior in primates
Tian Sang, Yichun Huang, Fangwei Zhong, Miao Wang, Shiqi Yu, Jiahui Li, Yuanjing Feng, Yizhou Wang, Kwok Sze Chai, Ravi S. Menon, Meiyun Wang, Fang Fang, Zheng Wang
https://arxiv.org/abs/2512.09761 https://arxiv.org/pdf/2512.09761 https://arxiv.org/html/2512.09761
arXiv:2512.09761v1 Announce Type: new
Abstract: Reinforcement learning (RL) enables adaptive behavior across species via reward prediction errors (RPEs), but the neural origins of species-specific adaptability remain unknown. Integrating RL modeling, transcriptomics, and neuroimaging during reversal learning, we discovered convergent RPE signatures - shared monoaminergic/synaptic gene upregulation and neuroanatomical representations, yet humans outperformed macaques behaviorally. Single-trial decoding showed RPEs guided choices similarly in both species, but humans disproportionately recruited dorsal anterior cingulate (dACC) and dorsolateral prefrontal cortex (dlPFC). Cross-species alignment uncovered that macaque prefrontal circuits encode human-like optimal RPEs yet fail to translate them into action. Adaptability scaled not with RPE encoding fidelity, but with the areal extent of dACC/dlPFC recruitment governing RPE-to-action transformation. These findings resolve an evolutionary puzzle: behavioral performance gaps arise from executive cortical readout efficiency, not encoding capacity.
toXiv_bot_toot

Decoding the ″bouba-kiki″ effect in early visual cortex https://www.biorxiv.org/content/10.64898/2026.01.17.700088v1 "V1 is capable to maintain differential representations of meaningless speech sounds if they are associated with visual shape categories.";

Seeing more than schemas: the vmPFC represents imagery-rich mental scenarios https://www.sciencedirect.com/science/article/pii/S0028393226000163 "Mental imagery varies dramatically across individuals", role of ventromedial prefrontal cortex (

How psychedelic drugs affect the brain https://www.sflorg.com/2026/02/ns02132601.html "High-resolution brain imaging reveals that psychedelics suppress external visual processing and instead drive visual areas to access the retrosplenial cortex, [...], thereby generating hallucinati…

How Psychedelic Drugs Affect the Brain
Research findings reinforce new approaches in psychology, using psychedelic substances under medical supervision to treat certain clinical conditions.

Neuroplasticity: Limits and the architecture of change https://medium.com/@krigerbruce/neuroplasticity-limits-and-the-architecture-of-change-be5346cae7f8 Case study of sensory substitution: Visual cortex activation in congenital blindne…

Friend, not foe: lowered tissue reactivity to long-term polyimide implants https://www.biorxiv.org/content/10.64898/2026.02.06.703281v1 "insights on optimizing device design parameters as well as surgical insights for improved tissue integration of intracortical electr…

Neural representations of visual memory in inferotemporal cortex reveal a generalizable framework for translating between spikes and field potentials https://www.biorxiv.org/content/10.64898/2026.01.03.697516v1 by @…

Unexpected partial recovery of natural vision observed after intracortical microstimulation in a blind patient https://medicalxpress.com/news/2026-02-unexpected-partial-recovery-natural-vision.html "The unexpected improvement was spontaneous, …

Unexpected partial recovery of natural vision observed after intracortical microstimulation in a blind patient
A patient with complete blindness caused by irreversible optic nerve damage partially recovered natural vision after participating in a clinical trial of electrical stimulation of the visual cortex conducted by researchers from the Universidad Miguel Hernández de Elche (UMH) and the CIBER in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN). The unexpected improvement was spontaneous, sustained over time, and independent of the implanted device.