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| Open AccessDiurnal changes in the efficiency of information transmission at a sensory synapse
Neuromodulators can adjust how sensory signals are processed. In this study, the authors demonstrate how time of day affects the way information is transmitted in the zebrafish retina.
- José Moya-Díaz
- , Ben James
- & Leon Lagnado
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| Open AccessON/OFF domains shape receptive field structure in mouse visual cortex
Neurons in the early visual system respond preferentially to the onset or offset of light. Here the authors show that ON/OFF responses cluster in the mouse primary visual cortex, shaping the receptive fields of cortical cells.
- Elaine Tring
- , Konnie K. Duan
- & Dario L. Ringach
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| Open AccessA theory of cortical map formation in the visual brain
Najafian et al. introduce a developmental theory of map formation in the cerebral cortex. The theory proposes that increases in the density of thalamic afferents sampling sensory space make cortical maps to segregate more stimulus dimensions.
- Sohrab Najafian
- , Erin Koch
- & Jose-Manuel Alonso
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| Open AccessMesoscopic landscape of cortical functions revealed by through-skull wide-field optical imaging in marmoset monkeys
The authors developed an optical imaging approach for mapping cortical functions through the intact skull in marmoset monkeys. Detailed functions and topographies were revealed in visual, auditory, and somatosensory cortices at mesoscopic scales.
- Xindong Song
- , Yueqi Guo
- & Xiaoqin Wang
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| Open AccessSpontaneous variability in gamma dynamics described by a damped harmonic oscillator driven by noise
It remains unclear how to best model local field potential gamma oscillations. Here, the authors show that gamma dynamics are well-captured by a damped harmonic oscillator model.
- Georgios Spyropoulos
- , Matteo Saponati
- & Martin Vinck
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| Open AccessTherapeutic homology-independent targeted integration in retina and liver
Limits of AAV-mediated gene therapy include targeting dominant mutations and inducing long-term transgene expression. Here, the authors show that AAV-HITI results in efficient allele-independent integration of a donor DNA in both retina and liver providing therapeutic benefit in mouse models of either a genetic form of blindness or a lysosomal storage disease, respectively.
- Patrizia Tornabene
- , Rita Ferla
- & Alberto Auricchio
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| Open AccessIn vivo base editing rescues cone photoreceptors in a mouse model of early-onset inherited retinal degeneration
Leber congenital amaurosis is caused by mutations in RPE65 and leads to retinal degeneration in children. Here, the authors show that in vivo base editing can prolong the survival of cone photoreceptors and rescue their function in a mouse model of the disease.
- Elliot H. Choi
- , Susie Suh
- & Krzysztof Palczewski
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| Open AccessReduced neural activity but improved coding in rodent higher-order visual cortex during locomotion
The authors analyze the Allen Institute Brain Observatory Ca2+ imaging data, focusing on mouse visual cortex during locomotive and quiescent states. They find that locomotion increases neural coding fidelity, regardless of whether population activity increases or decreases in response to the population’s preferred stimuli.
- Amelia J. Christensen
- & Jonathan W. Pillow
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Article
| Open AccessDonut-like organization of inhibition underlies categorical neural responses in the midbrain
Decision making is facilitated by categorical neuronal responses, which robustly signal a winner despite input noise. In this study, the authors demonstrate that a donut-like inhibition motif effectively generates such categorical responses.
- Nagaraj R. Mahajan
- & Shreesh P. Mysore
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| Open AccessDecoding internally generated transitions of conscious contents in the prefrontal cortex without subjective reports
The role of the prefrontal cortex in conscious perception is debated because of its involvement in task relevant behaviour, such as subjective perceptual reports. Here, the authors show that prefrontal activity in rhesus macaques correlates with subjective perception and the contents of consciousness can be decoded from prefrontal population activity even without reports.
- Vishal Kapoor
- , Abhilash Dwarakanath
- & Nikos K. Logothetis
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| Open AccessNumerosity tuning in human association cortices and local image contrast representations in early visual cortex
The authors show that spatial frequency domain Fourier power closely but nonlinearly follows numerosity, simplifying computing numerosity from early visual responses. Monotonic early visual cortex and neural network responses follow Fourier power, while later tuned responses follow numerosity.
- Jacob M. Paul
- , Martijn van Ackooij
- & Ben M. Harvey
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Article
| Open AccessLoss of the Bardet-Biedl protein Bbs1 alters photoreceptor outer segment protein and lipid composition
Primary cilia are key sensory organelles whose dysfunction leads to ciliopathy disorders such as Bardet-Biedl syndrome (BBS). Here they identify a role for Bbs1 in lipid homeostasis of photoreceptor outer segments in zebrafish, which may contribute to vision loss in patients with Bardet-Biedl syndrome.
- Markus Masek
- , Christelle Etard
- & Ruxandra Bachmann-Gagescu
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| Open AccessFeedforward and feedback interactions between visual cortical areas use different population activity patterns
How cortical areas interact via feedforward and feedback signaling remains unclear. Here, the authors recorded from V1 and V2/V4 in macaque visual cortex and found that feedforward and feedback interactions vary with stimulus drive and involve different neuronal population activity patterns.
- João D. Semedo
- , Anna I. Jasper
- & Byron M. Yu
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| Open AccessInvestigation of Cas9 antibodies in the human eye
Pre-existing antibodies against Cas9 proteins represent a potential issue for gene therapies, including those targeting the eye. Here the authors assess the presence of intraocular antibodies, and show that Cas9 antibodies were prevalent in human serum but not the eye, unless prior bacterial infection occurred.
- Marcus A. Toral
- , Carsten T. Charlesworth
- & Vinit B. Mahajan
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| Open AccessThe olfactory gating of visual preferences to human skin and visible spectra in mosquitoes
Vision in mosquitoes plays a critical but understudied role in their attraction to hosts. Here, the authors show that encounter with an attractive odor gates the mosquito attraction to specific colors, especially the long wavelengths reflected from human skin. Filtering the long wavelengths reflected from the human skin or knocking-out the ability for the mosquito to detect the wavelengths, suppressed their attraction. This work transforms our understanding of mosquito vision from the conventional view that vision does little in mediating mosquito-host interactions, to the recognition that vision plays a critical role.
- Diego Alonso San Alberto
- , Claire Rusch
- & Jeffrey A. Riffell
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| Open AccessTemporal dynamics of the neural representation of hue and luminance polarity
Hue (e.g. red, blue) and luminance polarity (light/dark) are basic visual features. This paper shows that the brain has both joint and separable representations of these features, and extracts hue approximately 20 milliseconds later, with a more sustained representation.
- Katherine L. Hermann
- , Shridhar R. Singh
- & Bevil R. Conway
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| Open AccessHierarchical and nonhierarchical features of the mouse visual cortical network
Mouse visual cortex is a dense, interconnected network of distinct areas. D’Souza et al. identify an anatomical index to quantify the hierarchical nature of pathways, and highlight the hierarchical and nonhierarchical features of the network.
- Rinaldo D. D’Souza
- , Quanxin Wang
- & Andreas Burkhalter
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| Open AccessA self-supervised domain-general learning framework for human ventral stream representation
It is unknown whether object category learning can be formed purely through domain general learning of natural image structure. Here the authors show that human visual brain responses to objects are well-captured by self-supervised deep neural network models trained without labels, supporting a domain-general account.
- Talia Konkle
- & George A. Alvarez
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Article
| Open AccessRetinal pigment epithelium-specific CLIC4 mutant is a mouse model of dry age-related macular degeneration
Age-related macular degeneration (AMD) is a leading cause of blindness and is characterised by the accumulation of lipid deposits, called drusen. Here, the authors show that mice lacking chloride intracellular channel 4 in retinal pigment epithelium have defective lipid processing in the eye and pathological features mirroring human AMD, including drusen formation.
- Jen-Zen Chuang
- , Nan Yang
- & Ching-Hwa Sung
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| Open AccessCoding strategy for surface luminance switches in the primary visual cortex of the awake monkey
How brightness is encoded in the visual cortex remains incompletely understood. By recording from macaque V1, the authors revealed a switch from surface to edge encoding that is mediated by widespread inhibition in the output layers of the cortex.
- Yi Yang
- , Tian Wang
- & Dajun Xing
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| Open AccessIdentification of a modular super-enhancer in murine retinal development
Super-enhancers are regions of genomic DNA comprised of multiple putative enhancers that contribute to dynamic gene expression patterns during development. Here the authors identify a modular super-enhancer in murine retinal development and show that distinct modules are responsible for retinal progenitor cell proliferation during early and bipolar neuron genesis during late retinal development.
- Victoria Honnell
- , Jackie L. Norrie
- & Michael A. Dyer
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| Open AccessFace detection in untrained deep neural networks
Face-selective neurons are observed in the primate visual pathway and are considered as the basis of face detection in the brain. Here, using a hierarchical deep neural network model of the ventral visual stream, the authors suggest that face selectivity arises in the complete absence of training.
- Seungdae Baek
- , Min Song
- & Se-Bum Paik
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| Open AccessVisual prototypes in the ventral stream are attuned to complexity and gaze behavior
Visual recognition depends on the ability to extract specific shape and colour features from complicated natural scenes. Here, the authors show that neurons along the object-recognition cortical pathway encode information-concentrating features of moderate complexity and of behavioural relevance.
- Olivia Rose
- , James Johnson
- & Carlos R. Ponce
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| Open AccessIn vivo volumetric imaging of calcium and glutamate activity at synapses with high spatiotemporal resolution
Adaptive optics (AO) corrects sample aberrations and allows high spatial resolution at depth in vivo. Here the authors report an AO method for Bessel focus; they apply AO Bessel focus scanning fluorescence microscopy to volumetric imaging and measure synaptic calcium and glutamate activity in vivo.
- Wei Chen
- , Ryan G. Natan
- & Na Ji
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| Open AccessUnsupervised deep learning identifies semantic disentanglement in single inferotemporal face patch neurons
Little is known about the brain’s computations that enable the recognition of faces. Here, the authors use unsupervised deep learning to show that the brain disentangles faces into semantically meaningful factors, like age or the presence of a smile, at the single neuron level.
- Irina Higgins
- , Le Chang
- & Matthew Botvinick
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| Open AccessA sensory memory to preserve visual representations across eye movements
A late enhancement of the perisaccadic neural response may exist in extrastriate areas. Here the authors show this preserves pre-saccadic information until the post-saccadic information is received, maintaining an integrated representation of the visual scene across saccadic eye movements.
- Amir Akbarian
- , Kelsey Clark
- & Neda Nategh
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| Open AccessLong-term priors influence visual perception through recruitment of long-range feedback
Priors learnt from lifetime experiences influence perception. The authors show that when perception is congruent with a long-term prior, there is increased top-down input in the ventral visual stream, whereas bottom-up input is enhanced when perception is incongruent with prior.
- Richard Hardstone
- , Michael Zhu
- & Biyu J. He
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| Open AccessSpared perilesional V1 activity underlies training-induced recovery of luminance detection sensitivity in cortically-blind patients
In humans, stroke damage to V1 causes large visual field defects. Spared V1 activity prior to training predicts the amount of training-induced recovery in luminance detection sensitivity. Moreover, visual training changes population receptive field properties within residual V1 circuits.
- Antoine Barbot
- , Anasuya Das
- & Krystel R. Huxlin
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Article
| Open AccessSpontaneous traveling waves naturally emerge from horizontal fiber time delays and travel through locally asynchronous-irregular states
Spontaneous traveling cortical waves shape neural responses. Using a large-scale computational model, the authors show that transmission delays shape locally asynchronous spiking dynamics into traveling waves without inducing correlations and boost responses to external input, as observed in vivo.
- Zachary W. Davis
- , Gabriel B. Benigno
- & Lyle Muller
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| Open AccessPrimary visual cortex straightens natural video trajectories
Many behaviours depend on predictions about the environment. Here the authors find neural populations in primary visual cortex to straighten the temporal trajectories of natural video clips, facilitating the extrapolation of past observations.
- Olivier J. Hénaff
- , Yoon Bai
- & Robbe L. T. Goris
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| Open AccessThe pupil responds spontaneously to perceived numerosity
Rapid and spontaneous estimation of number is observed in many animals. Here the authors show that perceived number of items modulates the pupillary light response in humans, confirming its spontaneous nature, and introducing pupillometry as a tool to study numerical cognition.
- Elisa Castaldi
- , Antonella Pomè
- & Paola Binda
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| Open AccessMulti-species single-cell transcriptomic analysis of ocular compartment regulons
A comprehensive analysis of the ocular networks among various tissues is necessary to understand eye physiology in health and disease. Here the authors present a multi-species single-cell transcriptomic atlas consisting of cells of the cornea, iris, ciliary body, neural retina, retinal pigmented epithelium, and choroid.
- Pradeep Gautam
- , Kiyofumi Hamashima
- & Yuin-Han Loh
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| Open AccessComputational models of category-selective brain regions enable high-throughput tests of selectivity
Distinct brain regions are claimed to respond selectively to faces, places and bodies, but what counts as a face, place or body is less well defined. Here we build computational models that accurately predict the response of these regions to novel images, enabling stronger tests and confirmation of their selectivity.
- N. Apurva Ratan Murty
- , Pouya Bashivan
- & Nancy Kanwisher
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| Open AccessLowering the thermal noise barrier in functional brain mapping with magnetic resonance imaging
The signal-to-noise ratio is a key consideration when selecting a magnetic resonance imaging protocol. Thermal noise is major issue, especially in high resolution functional images. Here the authors introduce a method to suppress thermal noise in functional images without losses in spatial precision, increasing the signal-to-noise ratio.
- Luca Vizioli
- , Steen Moeller
- & Kamil Uğurbil
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| Open AccessStable representation of a naturalistic movie emerges from episodic activity with gain variability
Here the authors show that individual neural responses in mouse V1 to a repeated natural movie clip consist of episodic activity which is unstable in gain across weeks. Despite of the gain variability, time in the natural movie is stably represented by population activity in V1.
- Ji Xia
- , Tyler D. Marks
- & Ralf Wessel
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| Open AccessThe physiological basis for contrast opponency in motion computation in Drosophila
The Drosophila visual system first computes motion in the dendrites of T4 and T5 neurons via a linear mechanism that uses ON and OFF information. Here, the authors show that the Tm9, Tm2, and CT1 neurons provide both ON and OFF information to direction-selective T5 cells in the OFF pathway.
- Giordano Ramos-Traslosheros
- & Marion Silies
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| Open AccessA direct interareal feedback-to-feedforward circuit in primate visual cortex
In the cerebral cortex, information is processed by multiple hierarchically organized areas, reciprocally connected via feedforward and feedback circuits. Here the authors show that in primate visual cortex, feedforward projection neurons receive monosynaptic feedback contacts selectively from the area to which they project.
- Caitlin Siu
- , Justin Balsor
- & Alessandra Angelucci
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| Open AccessHolistic face recognition is an emergent phenomenon of spatial processing in face-selective regions
It is unknown whether spatial processing in the ventral (‘what’) stream contributes to high-level visual recognition. Here the authors show that spatial processing in face-selective regions directly contributes to whole face recognition behavior.
- Sonia Poltoratski
- , Kendrick Kay
- & Kalanit Grill-Spector
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Article
| Open AccessWorking memory representations in visual cortex mediate distraction effects
The relative roles of visual, parietal, and frontal cortex in working memory have been actively debated. Here, the authors show that distraction impacts visual working memory representations in primary visual areas, indicating that these regions play a key role in the maintenance of working memory.
- Grace E. Hallenbeck
- , Thomas C. Sprague
- & Clayton E. Curtis
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| Open AccessOpposing effects of selectivity and invariance in peripheral vision
Visual processing necessitates both extracting and discarding information. Here, the authors use a specialized set of stimuli and two complementary discrimination tasks to demonstrate the opposing perceptual implications of these two aspects of information processing.
- Corey M. Ziemba
- & Eero P. Simoncelli
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| Open AccessDecision-related feedback in visual cortex lacks spatial selectivity
Feedback modulates visual neurons, thought to help achieve flexible task performance. Here, the authors show decision-related feedback is not only relayed to task-relevant neurons, suggesting a broader mechanism and supporting a previously hypothesized link to feature-based attention.
- Katrina R. Quinn
- , Lenka Seillier
- & Hendrikje Nienborg
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| Open AccessTemporal stability of stimulus representation increases along rodent visual cortical hierarchies
Understanding stability of representation in the visual system can benefit by use of non-static, naturalistic stimuli. Here the authors examine stability of neural representations along the rat ventral stream while viewing naturalistic and synthetic movies.
- Eugenio Piasini
- , Liviu Soltuzu
- & Davide Zoccolan
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| Open AccessObject representations in the human brain reflect the co-occurrence statistics of vision and language
When people view an object, they can often guess the setting from which it was drawn and the other objects that might be found in that setting. Here the authors identify regions of the human visual system that represent this information about which objects tend to appear together in the world.
- Michael F. Bonner
- & Russell A. Epstein
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Article
| Open AccessMouse visual cortex contains a region of enhanced spatial resolution
The representation of space in mouse visual cortex was considered to be relatively uniform. The authors show that mice have improved visual resolution in a cortical region representing a location in space directly in front and slightly above them, showing that the representation of space in mouse visual cortex is non-uniform.
- Enny H. van Beest
- , Sreedeep Mukherjee
- & Matthew W. Self
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Article
| Open AccessAnalysis of gene network bifurcation during optic cup morphogenesis in zebrafish
The gene regulatory network controlling the bifurcation of common progenitors into the neural retina and retinal-pigmented epithelium programs remains poorly understood. Here the authors study transcriptome dynamics and chromatin accessibility during this process in zebrafish, revealing network redundancy, as well as context-dependent and sequential transcription factor activity.
- Lorena Buono
- , Jorge Corbacho
- & Juan-Ramón Martínez-Morales
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| Open AccessNeuronal variability reflects probabilistic inference tuned to natural image statistics
The neural sampling theory suggests that neuronal variability encodes the uncertainty of probabilistic inferences. This paper shows that response variability in primary visual cortex reflects the statistical structure of visual inputs, as required for inferences correctly tuned to the statistics of the natural environment.
- Dylan Festa
- , Amir Aschner
- & Ruben Coen-Cagli
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Article
| Open AccessTopographic numerosity maps cover subitizing and estimation ranges
Here, the authors show that the brain represents small and large numerosity ranges in a continuous topographic map, in line with the idea that differences in map properties underlie differences in perception.
- Yuxuan Cai
- , Shir Hofstetter
- & Serge O. Dumoulin
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Article
| Open AccessCortical and subcortical signatures of conscious object recognition
Cortical and subcortical neural activity supporting conscious object recognition has not yet been well defined. Here, the authors describe these networks and show recognition-related category information can be decoded from widespread cortical activity but not subcortical activity.
- Max Levinson
- , Ella Podvalny
- & Biyu J. He
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| Open AccessA network linking scene perception and spatial memory systems in posterior cerebral cortex
Navigation requires integration of visual information with spatial memory representations. Steel et al. describe a new network of brain areas that facilitates the interaction between these perceptual and mnemonic neural systems.
- Adam Steel
- , Madeleine M. Billings
- & Caroline E. Robertson