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203 results for “visual function”
Data from: Functional modules for visual scene segmentation in macaque visual cortex
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Visualization of BBOB functions
<p>Recovering of the landscapes of selected functions from the black-box optimization benchmark (BBOB).<br>We used f17-f24 for demonstrations here, which exhibit high level of multimodality and are more complicated (we also show f1, which is a unimodal one for illustration of easier ones).<br>The task tested is to recover the landscape of each of these 2d functions. We first draw grid samples from the search space (40*40), and then create fitness landscapes based on Euclidean distance with a neighborhood distance threshold of 0.5. <br>We then visualize the landscape using our proposed method, and compares it to the groundtruth function surface. </p>
Topographic deep neural networks predict the functional organization of the primate ventral visual pathway
<p>Recording of presentation at the Neuroscience 2021 annual meeting (held virtually). The abstract follows:</p> <p> </p> <p>The primate ventral visual pathway is organized into functional maps, including pinwheel-like arrangements of orientation-tuned neurons in primary visual cortex (V1) and patches of category-selective neurons in higher visual cortex. While deep convolutional neural networks (DCNNs) trained for object recognition accurately predict neural representations throughout the ventral pathway, they have no spatial layout for features at a given retinotopic location and are thus unable to predict the rich topographic organization of visual cortex. Here, we close this gap by first assigning each DCNN unit a position in a 2D cortical sheet, then training the network to minimize a cost function with two components: one encouraging accurate object recognition, and another favoring correlated responses among nearby units in each model layer (Figure 1A, 1B). </p> <p>We find that training with this composite spatial loss produces brain-like topographic maps in both early and later model layers (Figure 1B). Early layers contain smooth orientation preference maps with pinwheels, clusters of units preferring the same spatial frequency, and color-preference domains resembling V1 “blobs”. In a later layer of the same model, we observe clusters of category-selective units, e.g., face patches, whose spatial organization largely matches that found in primate higher visual cortex. Our model thus leverages local response correlations, which have been linked to theories of wire-length minimization, to accurately predict neuron responses and functional organization throughout the ventral visual pathway. In support of the wire-length minimization hypothesis, we find that our topographic DCNN would require shorter connections than a standard DCNN to support connections between similarly-tuned neurons within early (38% reduction) and later (31% reduction) model layers (Figure 1D). These results suggest that the functional organization of visual cortex can be explained by two constraints: the need to perform object recognition and pressure for local populations of neurons to have correlated responses.</p>
Combination of Force Control Training and Mirror Visual Feedback Device on Stroke Patients on Brain Activation and Hand Function
ClinicalTrials.gov study NCT07150325. IPD Sharing: Not stated. Countries: 1. Publications: 89.
Intravenous Tranexamic Acid and Intraoperative Visualization During Functional Endoscopic Sinus Surgery
ClinicalTrials.gov study NCT01111669. IPD Sharing: Not stated. Countries: 1. Publications: 6.
Effect of the Pigment-free Optical Zone Diameter of Decorative Tinted Soft Contact Lenses on Visual Function
ClinicalTrials.gov study NCT02537275. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Evaluation of Visual Functions After Pars Plana Vitrectomy With and Without Internal Limiting Membrane Peeling in RRD
ClinicalTrials.gov study NCT04139811. IPD Sharing: NO. Countries: 1. Publications: 1.
ICG Angiogram as a Predictor of Postoperative Visual Function After EEA Surgery
ClinicalTrials.gov study NCT06501716. IPD Sharing: NO. Countries: 1. Publications: 4.
Visual Function Abnormalities in Strabismus and Amblyopia and Response to Therapy
ClinicalTrials.gov study NCT04310241. IPD Sharing: YES. Countries: 1. Publications: 3.
Augmented Macular Pigment-containing Nutraceutical and Central Visual Function
ClinicalTrials.gov study NCT04676126. IPD Sharing: NO. Countries: 1. Publications: 30.
The Effect of Oral Administration of 9-cis Rich Powder of the Alga Dunaliella Bardawil on Visual Functions in Adolescent Patients With Retinitis Pigmentosa
ClinicalTrials.gov study NCT02018692. IPD Sharing: NO. Countries: 1. Publications: 4.
Development of Visual Function Evaluation Method
ClinicalTrials.gov study NCT03281005. IPD Sharing: NO. Countries: 1. Publications: 1.
Electrophysiological Study of the Functioning of Magnocellular Visual Pathway in Regular Cannabis Users
ClinicalTrials.gov study NCT02864680. IPD Sharing: NO. Countries: 1. Publications: 3.
Optical Correction and Visual Functions of Adults With Amblyopia
ClinicalTrials.gov study NCT05394987. IPD Sharing: YES. Countries: 2. Publications: 1.
Diabetes Visual Function Supplement Study
ClinicalTrials.gov study NCT01646047. IPD Sharing: Not stated. Countries: 1. Publications: 2.
A Comparison of Visual Functions and Side-effects After DSAEK or DMEK for Fuchs' Endothelial Dystrophy
ClinicalTrials.gov study NCT04417959. IPD Sharing: Not stated. Countries: 1. Publications: 3.
The Effect of Oral Administration of 9-cis Rich Powder of the Alga Dunaliella Bardawil on Visual Functions im Patients With Retinitis Pigmentosa
ClinicalTrials.gov study NCT01256697. IPD Sharing: Not stated. Countries: 1. Publications: 2.
Clinical Study of Structural and Functional Evaluation of the Visual Pathway
ClinicalTrials.gov study NCT03591315. IPD Sharing: UNDECIDED. Countries: 1. Publications: 2.
The Study of Microglia/Macrophages Involved Dynamic Evolution of Glioma Microenvironment and the Function and Visualization of Targeted Molecules of Glioma
ClinicalTrials.gov study NCT04781764. IPD Sharing: NO. Countries: 1. Publications: 9.
Assement of Left Ventricular Function Before Decannulation in Cardiac Surgery :Visual Estimation vs TEE
ClinicalTrials.gov study NCT07286227. IPD Sharing: UNDECIDED. Countries: 1. Publications: 4.
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.