Featured
-
-
Article
| Open AccessDynamical latent state computation in the male macaque posterior parietal cortex
Natural behaviors induce changes to hidden states of the world that may be vital to track. Here, in monkeys navigating virtually to hidden goals, the authors show that neural interactions in the posterior parietal cortex play a role in tracking displacement from an unobservable goal.
- Kaushik J. Lakshminarasimhan
- , Eric Avila
- & Dora E. Angelaki
-
Article
| Open AccessMeta-learning biologically plausible plasticity rules with random feedback pathways
The biological plausibility of backpropagation and its relationship with synaptic plasticity remain open questions. The authors propose a meta-learning approach to discover interpretable plasticity rules to train neural networks under biological constraints. The meta-learned rules boost the learning efficiency via bio-inspired synaptic plasticity.
- Navid Shervani-Tabar
- & Robert Rosenbaum
-
Article
| Open AccessBrain-wide and cell-specific transcriptomic insights into MRI-derived cortical morphology in macaque monkeys
A comprehensive anatomically-defined atlas of brain transcriptomics in macaques is still lacking. Here, the authors generate complementary bulk RNA-seq and snRNA-seq datasets from cynomolgus macaques to examine the link between brain-wide gene expression and regional variation in morphometry.
- Tingting Bo
- , Jie Li
- & Zheng Wang
-
Article
| Open AccessComplexity of cortical wave patterns of the wake mouse cortex
The cerebral cortex has ongoing electrical activities with rich and complex patterns in space and time. Here, the authors use optical voltage imaging in mice and computational methods, relating these complexities to different levels of wakefulness.
- Yuqi Liang
- , Junhao Liang
- & Changsong Zhou
-
Article
| Open AccessNeuro-computational mechanisms and individual biases in action-outcome learning under moral conflict
How we juggle morally conflicting outcomes during learning remains unknown. Here, by comparing variants of reinforcement learning models, the authors show that participants differ substantially in their preference, with some choosing actions that benefit themselves while others choose actions that prevent harm.
- Laura Fornari
- , Kalliopi Ioumpa
- & Valeria Gazzola
-
Article
| Open AccessInferring neuron-neuron communications from single-cell transcriptomics through NeuronChat
Neurons communicate differently from non-neuronal cells. Here, authors present a method, NeuronChat, that utilizes scRNA-seq data and/or spatial transcriptomics to infer, visualize and analyze neural-specific cell-cell communication.
- Wei Zhao
- , Kevin G. Johnston
- & Qing Nie
-
Article
| Open AccessAbstract representations emerge naturally in neural networks trained to perform multiple tasks
How animals learn to generalize from one context to another remains unresolved. Here, the authors show that the abstract representations that are thought to underlie this form of generalization emerge naturally in neural networks trained to perform multiple tasks.
- W. Jeffrey Johnston
- & Stefano Fusi
-
Article
| Open AccessLow-dimensional encoding of decisions in parietal cortex reflects long-term training history
Posterior parietal cortex supports visual categorization in macaque monkeys. Here, the authors quantify low-dimensional neural population activity using tensor regression to find that long term training history impacts encoding of categorization.
- Kenneth W. Latimer
- & David J. Freedman
-
Article
| Open AccessOptogenetic stimulation of anterior insular cortex neurons in male rats reveals causal mechanisms underlying suppression of the default mode network by the salience network
The salience network has been hypothesised to modulate default mode network activity during stimulus-driven cognition. Here, the authors show that in rats, stimulation of the anterior insular cortex, a key node of the salience network, suppresses the default mode network and decouples these networks, providing in vivo evidence of a causal role of the anterior insular cortex in brain network switching.
- Vinod Menon
- , Domenic Cerri
- & Yen-Yu Ian Shih
-
Article
| Open AccessIntrinsic macroscale oscillatory modes driving long range functional connectivity in female rat brains detected by ultrafast fMRI
The mechanisms which generate fMRI signal correlations across the brain are not fully understood. Here, the authors record ultrafast fMRI signals in anesthetized female rats to demonstrate intrinsic macroscale oscillatory modes which drive correlated activity between distant regions.
- Joana Cabral
- , Francisca F. Fernandes
- & Noam Shemesh
-
Article
| Open AccessAlternative polyadenylation transcriptome-wide association study identifies APA-linked susceptibility genes in brain disorders
Alternative polyadenylation (APA) contributes to the post-transcriptional regulation of most human genes, yet the effects of APA are largely overlooked by conventional transcriptome-wide association studies (TWAS). Here, the authors conduct an APA-TWAS for 11 brain disorders, identifying hundreds of APA-linked disease susceptibility genes.
- Ya Cui
- , Frederick J. Arnold
- & Wei Li
-
Article
| Open AccessNeural mechanisms underlying the hierarchical construction of perceived aesthetic value
How the brain computes the value of complex stimuli such as visual art remains poorly understood. Here, the authors use computational models and fMRI to show that this process involves an integration over low- and high-level features across visual, parietal, and frontal cortical areas.
- Kiyohito Iigaya
- , Sanghyun Yi
- & John P. O’Doherty
-
Article
| Open AccessInferring visual space from ultra-fine extra-retinal knowledge of gaze position
It is unknown how humans establish stable visual percepts despite the incessant motion of their eyes. Here the authors report that visual judgments of spatial relations incorporate fine-scale motor knowledge of eye position.
- Zhetuo Zhao
- , Ehud Ahissar
- & Michele Rucci
-
Article
| Open AccessDistributed context-dependent choice information in mouse posterior cortex
In the posterior cortex, which is involved in decision making, the strength and area specificity of choice signals are highly variable. Here the authors show that the representation of choice in the posterior area of the mouse brain is orthogonal to that of sensory and movement-related signals, with modulations determined by task features and cognitive demands.
- Javier G. Orlandi
- , Mohammad Abdolrahmani
- & Andrea Benucci
-
Article
| Open AccessChoice selective inhibition drives stability and competition in decision circuits
In decision circuits, inhibitory neurons signal animal choices. Here, the authors show that choice-selective inhibition can stabilize the circuit dynamics or promote competition depending on inhibitory output connections, affecting choice behavior.
- James P. Roach
- , Anne K. Churchland
- & Tatiana A. Engel
-
Article
| Open AccessIntroducing the Dendrify framework for incorporating dendrites to spiking neural networks
Biologically inspired spiking neural networks are highly promising, but remain simplified omitting relevant biological details. The authors introduce here theoretical and numerical frameworks for incorporating dendritic features in spiking neural networks to improve their flexibility and performance.
- Michalis Pagkalos
- , Spyridon Chavlis
- & Panayiota Poirazi
-
Article
| Open AccessCerebro-cerebellar networks facilitate learning through feedback decoupling
Behavioral feedback is critical for learning, but it is often not available. Here, the authors introduce a deep learning model in which the cerebellum provides the cerebrum with feedback predictions, thereby facilitating learning, reducing dysmetria, and making several experimental predictions.
- Ellen Boven
- , Joseph Pemberton
- & Rui Ponte Costa
-
Article
| Open AccessEfficient neural codes naturally emerge through gradient descent learning
In animals, sensory systems appear optimized for the statistics of the external world. Here the authors take an artificial psychophysics approach, analysing sensory responses in artificial neural networks, and show why these demonstrate the same phenomenon as natural sensory systems.
- Ari S. Benjamin
- , Ling-Qi Zhang
- & Konrad P. Kording
-
Article
| Open AccessSynaptic basis of a sub-second representation of time in a neural circuit model
Neural circuit dynamics are thought to drive temporally precise actions. Here, the authors used a theoretical approach to show that synapses endowed with diverse short-term plasticity can act as tunable timers sufficient to generate rich neural dynamics.
- A. Barri
- , M. T. Wiechert
- & D. A. DiGregorio
-
Article
| Open AccessAn integrated resource for functional and structural connectivity of the marmoset brain
Mapping brain connections is critical for decoding brain functions. Here, the authors present an integrated resource of awake resting-state fMRI and neuronal tracing data of marmosets to understand structural-functional relationships of brain connections.
- Xiaoguang Tian
- , Yuyan Chen
- & Cirong Liu
-
Article
| Open AccessVisual motion perception as online hierarchical inference
How the human visual system leverages the rich structure in object motion for perception remains unclear. Here, Bill et al. propose a theory of how the brain could infer motion relations in real time and offer a unifying explanation for various perceptual phenomena.
- Johannes Bill
- , Samuel J. Gershman
- & Jan Drugowitsch
-
Article
| Open AccessIntrinsic brain dynamics in the Default Mode Network predict involuntary fluctuations of visual awareness
The default mode network (DMN) is known to be involved in consciousness. Here the authors show intrinsic EEG oscillations in default mode network can predict upcoming involuntarily perceptual transitions.
- Dian Lyu
- , Shruti Naik
- & Emmanuel A. Stamatakis
-
Article
| Open AccessGeneralizable spelling using a speech neuroprosthesis in an individual with severe limb and vocal paralysis
Previous work has described a neuroprosthesis to directly decode full words in real time during attempts to speak. Here the authors demonstrate that a patient with anarthria can control this neuroprosthesis to spell out intended messages in real time using attempts to silently speak.
- Sean L. Metzger
- , Jessie R. Liu
- & Edward F. Chang
-
Article
| Open AccessMultimodal analysis demonstrating the shaping of functional gradients in the marmoset brain
How functional connectivity gradients in the cortex arise and vary dynamically is not fully understood. Here the authors show that gradients are determined by structural wiring but may be modulated by arousal levels.
- Chuanjun Tong
- , Cirong Liu
- & Zhifeng Liang
-
Article
| Open AccessComputational and neural mechanisms of statistical pain learning
Pain fluctuates over time in ways that are non-random. Here, the authors show that the human brain can learn to predict these changes in a manner consistent with optimal Bayesian inference by engaging sensorimotor, parietal, and premotor regions.
- Flavia Mancini
- , Suyi Zhang
- & Ben Seymour
-
Article
| Open AccessNeural dynamics of phoneme sequences reveal position-invariant code for content and order
Speech unfolds faster than the brain completes processing of speech sounds. Here, the authors show that brain activity moves systematically within neural populations of auditory cortex, allowing accurate representation of a speech sound’s identity and its position in the sound sequence.
- Laura Gwilliams
- , Jean-Remi King
- & David Poeppel
-
Article
| Open AccessNatural scene sampling reveals reliable coarse-scale orientation tuning in human V1
Whether orientation-selectivity is discernable via fMRI remains unclear. Here, by analyzing a public dataset of responses to natural scenes using neurally-inspired image-computable models, the authors isolate and characterize a coarse-scale orientation map and demonstrate that orientation-selective BOLD responses reflect multiple distinct computations at a range of spatial scales.
- Zvi N. Roth
- , Kendrick Kay
- & Elisha P. Merriam
-
Article
| Open AccessMicro-scale functional modules in the human temporal lobe
The sensory cortices of many mammals consist of modules in the form of cortical columns. By analyzing functional connectivity and neural responses to visual stimuli, the authors show that this organization may extend to the human temporal lobe.
- Julio I. Chapeton
- , John H. Wittig Jr
- & Kareem A. Zaghloul
-
Article
| Open AccessA neural theory for counting memories
It is unclear how the brain keeps track of the number of times different events are experienced. Here, a neural circuit is proposed for this problem inspired by a classic solution in computer science, and evidence of this circuit is shown in the fruit fly brain.
- Sanjoy Dasgupta
- , Daisuke Hattori
- & Saket Navlakha
-
Article
| Open AccessA neuronal prospect theory model in the brain reward circuitry
It is unclear how the activity of individual neurons conform to prospect theory. Here, the authors demonstrate that the activity of single neurons in various reward-related regions in the monkey brain can be described as encoding a multiplicative combination of utility and probability weighting, and that this subjective valuation process is achieved via a distributed coding scheme.
- Yuri Imaizumi
- , Agnieszka Tymula
- & Hiroshi Yamada
-
Article
| Open AccessRecurrent neural networks with explicit representation of dynamic latent variables can mimic behavioral patterns in a physical inference task
The ability to infer the dynamics of physical objects is hypothesized to rely on running simulations of mental models. Here, the authors test this hypothesis by comparing human and monkey behavior to recurrent neural network models in a physical inference task.
- Rishi Rajalingham
- , Aída Piccato
- & Mehrdad Jazayeri
-
Article
| Open AccessReceptor-informed network control theory links LSD and psilocybin to a flattening of the brain’s control energy landscape
There are several models of how serotonergic psychedelic drugs affect brain activity. Here the authors use network control theory and functional MRI data to provide evidence that serotonin receptor agonists LSD and psilocybin flatten the brain’s dynamic landscape, allowing for facile state transitions and more temporally diverse brain activity.
- S. Parker Singleton
- , Andrea I. Luppi
- & Amy Kuceyeski
-
Article
| Open AccessClassical center-surround receptive fields facilitate novel object detection in retinal bipolar cells
Center-surround receptive fields are typically considered to mediate edge detection. Here, by studying retinal bipolar cells responding to flashed and moving stimuli, the authors reveal an additional function: enhanced representation of newly appearing visual items.
- John A. Gaynes
- , Samuel A. Budoff
- & Alon Poleg-Polsky
-
Article
| Open AccessCenter-surround interactions underlie bipolar cell motion sensitivity in the mouse retina
Motion vision is critical for survival. Here the authors show that motion detection occurs already in bipolar cells of the mouse retina, which may contribute to motion processing throughout the visual system.
- Sarah Strauss
- , Maria M. Korympidou
- & Anna L. Vlasits
-
Article
| Open AccessA neuro-computational account of procrastination behavior
Most humans procrastinate to some extent, despite adverse consequences. Here, the authors show that how much an individual procrastinates, both in the lab and at home, relates to brain signals that reflect temporal discounting of effort cost.
- Raphaël Le Bouc
- & Mathias Pessiglione
-
Article
| Open AccessSynaptic plasticity in self-powered artificial striate cortex for binocular orientation selectivity
Designing efficient bio-inspired vision systems remains a challenge. Here, the authors report a bio-inspired striate visual cortex with binocular and orientation selective receptive field based on self-powered memristor to enable machine vision with brisk edge and corner detection in the future applications.
- Yanyun Ren
- , Xiaobo Bu
- & Su-Ting Han
-
Article
| Open AccessContext-dependent selectivity to natural images in the retina
Ganglion cells classically respond to either light increase (ON) or decrease (OFF). Here, the authors show that during natural scene stimulation, a single ganglion cell can switch between ON and OFF depending on the visual context.
- Matías A. Goldin
- , Baptiste Lefebvre
- & Olivier Marre
-
Article
| Open AccessLearning enhances encoding of time and temporal surprise in mouse primary sensory cortex
Activity in the superficial layers of the sensory cortex is believed to be largely driven by incoming sensory stimuli. Here the authors demonstrate how learning changes neural responses to sensations according to both behavioral relevance and timing, suggesting a high degree of non-sensory modulation.
- Rebecca J. Rabinovich
- , Daniel D. Kato
- & Randy M. Bruno
-
Article
| Open AccessSmall, correlated changes in synaptic connectivity may facilitate rapid motor learning
How animals are able to rapidly adapt their behaviour to changing environmental demands remains poorly understood. Here, the authors use a modelling approach to show that synaptic plasticity in motor cortex may underlie rapid motor learning, demonstrating that small, correlated connectivity changes that preserve neural covariance are highly effective in driving behavioural adaptation.
- Barbara Feulner
- , Matthew G. Perich
- & Claudia Clopath
-
Article
| Open AccessDegenerate boundaries for multiple-alternative decisions
How animals make multiple-choice decisions over three or more alternatives is not well understood. Here the authors use simulations to uncover that there is not one but many optimal parameter value configurations on the reward landscape of the multiple-choice threshold boundaries.
- Sophie-Anne Baker
- , Thom Griffith
- & Nathan F. Lepora
-
Article
| Open AccessPopulation-based tract-to-region connectome of the human brain and its hierarchical topology
The brain connectome maps region-to-region connections but often ignores the role of the connecting pathways. Here, the authors mapped the tract-to-region relations to reveal the hierarchical relation of fiber bundles and dorsal, ventral, and limbic networks.
- Fang-Cheng Yeh
-
Article
| Open AccessPrecision dynamical mapping using topological data analysis reveals a hub-like transition state at rest
Although spontaneous brain activity is complex and clinically relevant, it is still unclear whether transitions in resting brain activity follow an underlying arrangement or whether they are unpredictable. In this work, the authors revealed a transition state of the brain that acts like a switch between states and forms the basis for the continuous evolution of brain activity patterns at rest.
- Manish Saggar
- , James M. Shine
- & Damien Fair
-
Article
| Open AccessLocal molecular and global connectomic contributions to cross-disorder cortical abnormalities
Changes to structural and functional connectivity can give rise to neurodegeneration and neurodevelopmental diseases. Here the authors investigate molecular and connectomic patterns in 13 different neurological, psychiatric and neurodevelopmental diseases from the ENIGMA consortium.
- Justine Y. Hansen
- , Golia Shafiei
- & Bratislav Misic
-
Article
| Open AccessA neural circuit for wind-guided olfactory navigation
Flies navigate to food sources by combining odour and wind-direction cues. This study identifies pathways to the fan-shaped body that encode these signals, and demonstrates how local neurons integrate odour- and wind information to guide navigation.
- Andrew M. M. Matheson
- , Aaron J. Lanz
- & Katherine I. Nagel
-
Article
| Open AccessFractional neural sampling as a theory of spatiotemporal probabilistic computations in neural circuits
Dynamics of neural circuits mapping brain functions such as sensory processing and decision making, can be characterized by probabilistic representations and inference. The authors elaborate the role of spatiotemporal neural dynamics for more efficient performance of probabilistic computations.
- Yang Qi
- & Pulin Gong
-
Article
| Open AccessStructural network alterations in focal and generalized epilepsy assessed in a worldwide ENIGMA study follow axes of epilepsy risk gene expression
Epilepsy is a brain network disorder with associated genetic risk factors. Here, the authors show that spatial patterns of transcriptomic vulnerability co-vary with structural brain network alterations in focal and generalized epilepsy.
- Sara Larivière
- , Jessica Royer
- & Boris C. Bernhardt
-
Article
| Open AccessA synaptic signal for novelty processing in the hippocampus
Memory formation and recall are complementary processes within the hippocampus. Here the authors demonstrate a synaptic signal of novelty in the hippocampus and provide a computational framework for how such a novelty-driven switch may enable flexible encoding of new memories while preserving stable retrieval of familiar ones.
- Ruy Gómez-Ocádiz
- , Massimiliano Trippa
- & Christoph Schmidt-Hieber
-
Article
| Open AccessCompulsive alcohol drinking in rodents is associated with altered representations of behavioral control and seeking in dorsal medial prefrontal cortex
Compulsive alcohol drinking is a core feature of alcohol use disorder. Here the authors find that in rodents, neural signals in a key decision-making brain region (dmPFC) shift from behavioral control to alcohol seeking during compulsive alcohol drinking behaviour.
- Nicholas M. Timme
- , Baofeng Ma
- & Christopher C. Lapish
-
Article
| Open AccessTemperature elevations can induce switches to homoclinic action potentials that alter neural encoding and synchronization
The intrinsic dynamics of neurons, in particular the generation action potentials, can impact neural network states and processes of encoding information. The authors demonstrate how the elevation of temperature induces a type of action potential dynamics that favors synchronization patterns in neural networks.
- Janina Hesse
- , Jan-Hendrik Schleimer
- & Susanne Schreiber