Bump attractor
WebHere, 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 ... 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.
Bump attractor
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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 … 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.
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. WebEnter the email address you signed up with and we'll email you a reset link.
WebSep 16, 2024 · Bump attractors are wandering localised patterns observed in in vivo experiments of spatially-extended neurobiological networks. They are important for the … 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 …
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 ...
http://neurophysics.ucsd.edu/courses/physics_171/Wimmer_Compte_reprint.pdf イオナ 最終回WebMar 16, 2024 · Here, we show that the continuous ring attractor network can integrate a stimulus feature such as orientation and track the stimulus average in the phase of its activity bump. We reduced the network dynamics of the ring model to a two-dimensional equation for the amplitude and the phase of the bump. Interestingly, these reduced … otro si al contrato individual de trabajoWebOct 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 ... otro si al contrato minutaWebSep 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 … otro significatoWebFind 45 ways to say BUMP, along with antonyms, related words, and example sentences at Thesaurus.com, the world's most trusted free thesaurus. otro si contrato de arrendamiento modeloWebUnderstanding the neural mechanisms of working memory has been a long-standing Neuroscience goal. Bump attractor models have been used to simulate persistent activity generated in the prefrontal cortex during … otro si contrato arrendamientoWe 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 otro si al contrato de promesa de compraventa