2024 Bump attractor

Bump attractor

Author: bfec

August undefined, 2024

WebBump attractor networks have played a key role in modeling and analyzing the neural processes involved in path integration. In such networks, self-motion inputs and asymmetries in the network translate an activity bump over the attractor manifold, updating the animal's perceived position in space. WebWhat I observe in my simulations are 'bump' attractors that appear, disappear, and may wander around. Here is a screen shot from a simulation: Dark blue dots represent excitatory neurons' spikes (fading into white to leave a trace), and dark red triangles representing inhibitory neurons' spikes.

Replay as wavefronts and theta sequences as bump oscillations ... - PubMed

http://www.scholarpedia.org/article/Continuous_attractor_network WebBump attractors are localized activity patterns that can self-sustain after stimulus presentation, and they are regarded as the neural substrate for a host of perceptual and … the philadelphia film co rentals

David Kleinfeld Laboratory at UC San Diego

WebNov 12, 2013 · A continuous attractor network (or continuous-attractor neural network, CANN) is an attractor network possessing one or more quasicontinuous sets of … WebMay 24, 2024 · Hello, I Really need some help. Posted about my SAB listing a few weeks ago about not showing up in search only when you entered the exact name. I pretty … Web1 day ago · A neural circuit is a network of nodes in which the connections, dynamics of each node’s activity and inputs are specified. According to the traditional view, the nodes in the network can be ... sick boy cole

Frontiers Models of Innate Neural Attractors and Their …

Subdiffusive Dynamics of Bump Attractors: Mechanisms …

WebJan 1, 2024 · With the reduced model in hand, we can then approximate the dynamics of the bump position using a continuous time Markov chain model that describes bump motion between local attractors. While heterogeneity reduces the effective diffusion of the bumps, it also disrupts the processing of velocity inputs by slowing the velocity-induced … WebPath integration is a navigational strategy through which an animal remains oriented even in the absence of stable landmarks. Bump attractor networks have played a key role in modeling and analyzing the neural processes involved in path integration. In such networks, self-motion inputs and asymmetries in the network translate an activity bump over the … the philadelphia home rule charterWebHere, we show that a continuous bump attractor network can integrate a circular feature, such as stimulus direction, nearly optimally. As required by optimal integration, the population activity of the network unfolds on a two-dimensional manifold, in which the position of the network’s activity bump tracks the stimulus average, and ... the philadelphia foot patrol experiment

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Bump attractor

WebSep 8, 2014 · 18.3 Bump attractors and spontaneous pattern formation. 18.3. Bump attractors and spontaneous pattern formation. In this section we study a continuum model with strong recurrent connections such that … WebSep 16, 2024 · Bump attractors are wandering localised patterns observed in in vivo experiments of spatially-extended neurobiological networks. They are important for the …

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We tested different network representations for memory maintenance in three computational network models, the bump attractor network, the discrete attractor network and the decaying bump network. We provide Matlab code for these models, including all relevant parameters, as Supplementary Codes 1, 2 … See more Two adult, male rhesus monkeys (Macaca mulatta) were trained in an oculomotor delayed response task requiring them to view a visual stimulus on a screen and make an eye … See more A total of 822 neurons were recorded from two monkeys with the eight-target oculomotor delayed response task. Sample size was … See more We applied parametric tests (t test, ANOVA or Harrison-Kanji test for circular data) to validate our hypotheses whenever our data satisfied the assumptions of normality and homoscedasticity (Lilliefors test of normality, P > … See more Webful model has been the “bump attractor,” in which a continuous attractor emerges through an underlying symmetry in the network connectivity matrix. This model, however, cannot account for data in which the per-sistent ﬁring of neurons is a monotonic—rather than a bell-shaped— ...

WebNov 18, 2024 · We demonstrate that this established architecture naturally produces theta sequences and replay as distinct consequences of modulating external input. Driving inhibitory interneurons at the theta frequency causes attractor bumps to oscillate in speed and size, which gives rise to theta sequences and phase precession, respectively.

WebMar 30, 2024 · A bump attractor network is a model that implements a competitive neuronal process emerging from a spike pattern related to an input source. Since the bump network could behave in many ways, this paper explores some critical limits of the parameter space using various positive and negative weights and an increasing size of … WebDec 3, 2024 · These noise-induced effects of bump attractors lead to a number of computational advantages including enhanced working memory capacity and efficient …

WebFind 45 ways to say BUMP, along with antonyms, related words, and example sentences at Thesaurus.com, the world's most trusted free thesaurus.

WebJul 14, 2024 · Continuous bump attractor modeling suggested neurophysiological and functional organization factors in the increasing unsystematic errors in VSWM across space and time. These findings indicate ... the philadelphia flaghttp://neurophysics.ucsd.edu/courses/physics_171/Wimmer_Compte_reprint.pdf the philadelphia flower show 2022WebEnter the email address you signed up with and we'll email you a reset link. sickboy artWebbump attractor (Compte et al., 2000). We examine the effects of interareal architecture on the dynamics of bump attractors in stochastic neural ﬁelds. Lateral inhibitory synaptic structure in each area sustains stationary bumps in the absence of noise. Introducing noise causes bumps in individual areas to wander as a Brownian walk. the philadelphia flyersWebFeb 1, 2015 · Bump attractors are localized activity patterns that can self-sustain after stimulus presentation, and they are regarded as the neural substrate for a host of … the philadelphia filmWebBump attractors are wandering localized patterns observed in in vivo experiments of spatially extended neurobiological networks. They are important for the brain's … the philadelphia fedWebOct 1, 2024 · This apparent paradox is resolved by noting that in continuous attractor models, random displacements of a bump attractor occur along the dimension of marginal stability (pink manifold in Figure 1 B), rather than through jumps from one attractor basin to the other, as observed in discrete attractor models that are commonly used to model ... the philadelphia foundation grants