2024 Bump attractor

Bump attractor

Author: cdjh

August undefined, 2024

WebOct 24, 2011 · While bump attractor dynamics are preserved for values of the heterogeneity strength ε up to order O(1), the above analysis indicates that the drift of the activity bump may be too fast unless ε is chosen to be much closer to zero – i.e., unless the synaptic efficacies have much finer tuning than necessary for maintaining bump attractor ... WebSep 16, 2024 · Bump attractors are wandering localised patterns observed in in vivo experiments of spatially-extended neurobiological networks. They are important for the brain's navigational system and specific memory tasks. A bump attractor is characterised by a core in which neurons fire frequently, while those away from the core do not fire. We …

Frontiers Short-Term Facilitation may Stabilize Parametric Working ...

WebDec 3, 2024 · These noise-induced effects of bump attractors lead to a number of computational advantages including enhanced working memory capacity and efficient … WebWe show that this representation can be implemented in a neural attractor network model, resulting in bump-like activity profiles resembling those of the CA3 region of hippocampus. Neurons tend to locally excite neurons with similar place field centers, while inhibiting other neurons with distant place field centers, such that stable bumps of ... get up burning heart 意味

Bump attractor dynamics in prefrontal cortex explains behavioral precisi…

WebJul 27, 2024 · Making the beverage temperature subnets bump attractors enables persistent activity. However, with large input ranges, there are two bumps of activity at the ends of the range. For example, in the Hot Coffee case, neurons 70 ∘ to 74 ∘ and 95 ∘ to 99 ∘ fire persistently. This is the problem that was solved in Section 4. WebDriving Directions to Tulsa, OK including road conditions, live traffic updates, and reviews of local businesses along the way. WebMar 15, 2024 · The bump location thus provides 56 a substrate for encoding a continuous variable such as an orientation or a spatial location. Moreover, 57 while intrinsically the bump position is stable, external inputs can drive the bump to move. Due to these 58 features, bump attractor networks have been proposed as the neural mechanism … christopher o\u0027malley attorney

Bump attractor

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

WebSep 16, 2024 · Bump attractors are wandering localised patterns observed in in vivo experiments of spatially-extended neurobiological networks. They are important for the … WebFeb 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 …

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WebOct 4, 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 … 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 …

WebBump attractors are wandering localized patterns observed in in vivo experiments of spatially extended neurobiological networks. They are important for the brain's … WebDec 4, 2009 · Its branches are narrow, so an active bump of place cells spans the width of a branch. This T is one of five known environments embedded in the connection matrices. The RR has learned about a potential reward at a location w, so neuron S is activated strongly when the center of the bump attractor in E is at w. RR is now placed at position x.

WebJun 22, 2024 · Bump-attractor dynamics are characterized by negative pairwise noise correlations for cues presented between the preferred locations (within pref) of the two … Webnoun. something that bulges out or is protuberant or projects from its surroundings. synonyms: bulge, excrescence, extrusion, gibbosity, gibbousness, hump, jut, …

Webto come more or less violently in contact with; collide with; strike: His car bumped a truck. to cause to strike or collide: He bumped the car against a tree. verb (used without object) to …

WebJul 27, 2024 · While bump attractors are a common and long standing model, these large valued inputs force a reduction in the number of inhibitory connections so that the bump … get up challenge blanco brownWebJan 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 … get up charlyWebPath 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 … get up charityWe 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 christopher o\\u0027malleyWebWhat 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. get up clothingWebOct 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 ... christopher o\u0027kroley cause of deathWebDavid Kleinfeld Laboratory at UC San Diego christopher o\u0027malley cameron house