FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2325640857> ?p ?o ?g. }

• W2325640857 abstract "Event Abstract Back to Event Self-Organization of Control Circuits for Fiber Projections Invariant to Position, Size and Orientation Tomas Fernandes1 and Christoph Von Der Malsburg1* 1 Frankfurt Institute for Advanced Studies, Germany Dynamic mappings support the projection of the two-dimensional field of local feature descriptors within the focus of attention in primary visual cortex to an invariant space, presumably in infero-temporal cortex. These mappings must be re-established after each shift of attention or eye movement, that is, within fractions of a second. We proceed on the assumption that this rapid switching is achieved with the help of so-called control units. These are specialized neurons each of which contacts with its processes a number of projection fibers (possibly by placing its synapses in close apposition at a dendritic patch) and which perform two functions. On the one hand they test for agreement between the pre-synaptic and the post-synaptic signals at the projection fibers they contact, thus comparing the activity pattern on the whole set of incoming fibers to the activity pattern on the target neurons. If that pattern similarity is better than that of competing control units, they stay active, otherwise they switch off. On the other hand, control units gate the transmission of projection fibers (pre-activating the dendritic patch, mentioned above, when active). Control units have first been proposed by [Anderson 1987]. In previous work we have simulated a full-blown face recognition system on this basis [Wolfrum 2008]. This scheme requires highly specific connectivity patterns of control units. We are addressing here the ontogenesis and learning of these connectivity patterns. The common underlying principle of our simulations is similar to what is known about the ontogenesis of retinotopic mappings, e.g., of the fiber projections from retina to the optic tectum. There, chemical or electrical signals are induced from the retina to the tectum. Short-range signal correlations in the retina serve to code retinal geometry and allow fibers coming from neighboring positions in the retina to connect to neighboring positions in the tectum, as described in [Häussler 1983] by a set of differential equations (Häussler equations). To accommodate that system to the application at hand by introducing control units by a third set of indices, in addition to the retinal and tectal indices, and by letting synaptic plasticity affect not projection synapses (which essentially have to realize all-to-all connections between the source area and the target area) but the connections of the control units. In previous work we have presented simulations that addressed the generation of control circuits for a few point-to-point projection patterns that differ in relative position and size [Bergmann 2011]. We here extend this work in two directions, a continuous range of projection parameters (relative position, size and orientation) and the organization of dynamic control not only of point-to-point connections but also of feature-to-feature connections. The latter is necessary because when rotating or scaling the retinal image of an object, feature relations have to change as well. Acknowledgements Supported by EU project “SECO” and the Hertie Foundation. References Anderson, C. H. and Van Essen, D. C. (1987). Shifter circuits: a computational strategy for dynamic aspects of visual processing. PNAS 84, 6297-6301. Wolfrum, P., Wolff, C., Lücke, J., and von der Malsburg, C. (2008). A Recurrent Dynamic Model for Correspondence-Based Face Recognition. Journal of Vision 8, 1-18. http://journalofvision.org/8/7/34/ Häussler, A.F. and von der Malsburg, C (1983). Development of Retinotopic Projections -- An Analytical Treatment. J. Theor. Neurobiol. 2, 47-73. Bergmann, U. and von der Malsburg, C. (2011). Self-Organization of Topographic Bilinear Networks for Invariant Recognition. Neural Computation 23, 2770-2797. Keywords: invariance, Learning, ontogenesis, Vision Conference: Bernstein Conference 2012, Munich, Germany, 12 Sep - 14 Sep, 2012. Presentation Type: Poster Topic: Learning, plasticity, memory Citation: Fernandes T and Von Der Malsburg C (2012). Self-Organization of Control Circuits for Fiber Projections Invariant to Position, Size and Orientation. Front. Comput. Neurosci. Conference Abstract: Bernstein Conference 2012. doi: 10.3389/conf.fncom.2012.55.00062 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 24 May 2012; Published Online: 12 Sep 2012. * Correspondence: Dr. Christoph Von Der Malsburg, Frankfurt Institute for Advanced Studies, Frankfurt am Main, Hesse, 60438, Germany, malsburg@fias.uni-frankfurt.de Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Tomas Fernandes Christoph Von Der Malsburg Google Tomas Fernandes Christoph Von Der Malsburg Google Scholar Tomas Fernandes Christoph Von Der Malsburg PubMed Tomas Fernandes Christoph Von Der Malsburg Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page." @default.
• W2325640857 created "2016-06-24" @default.
• W2325640857 creator A5073461429 @default.
• W2325640857 date "2012-01-01" @default.
• W2325640857 modified "2023-10-18" @default.
• W2325640857 title "Self-Organization of Control Circuits for Fiber Projections Invariant to Position, Size and Orientation" @default.
• W2325640857 doi "https://doi.org/10.3389/conf.fncom.2012.55.00062" @default.
• W2325640857 hasPublicationYear "2012" @default.
• W2325640857 type Work @default.
• W2325640857 sameAs 2325640857 @default.
• W2325640857 citedByCount "0" @default.
• W2325640857 crossrefType "journal-article" @default.
• W2325640857 hasAuthorship W2325640857A5073461429 @default.
• W2325640857 hasConcept C11413529 @default.
• W2325640857 hasConcept C15744967 @default.
• W2325640857 hasConcept C169760540 @default.
• W2325640857 hasConcept C190470478 @default.
• W2325640857 hasConcept C2779345533 @default.
• W2325640857 hasConcept C33923547 @default.
• W2325640857 hasConcept C37914503 @default.
• W2325640857 hasConcept C41008148 @default.
• W2325640857 hasConcept C57493831 @default.
• W2325640857 hasConceptScore W2325640857C11413529 @default.
• W2325640857 hasConceptScore W2325640857C15744967 @default.
• W2325640857 hasConceptScore W2325640857C169760540 @default.
• W2325640857 hasConceptScore W2325640857C190470478 @default.
• W2325640857 hasConceptScore W2325640857C2779345533 @default.
• W2325640857 hasConceptScore W2325640857C33923547 @default.
• W2325640857 hasConceptScore W2325640857C37914503 @default.
• W2325640857 hasConceptScore W2325640857C41008148 @default.
• W2325640857 hasConceptScore W2325640857C57493831 @default.
• W2325640857 hasLocation W23256408571 @default.
• W2325640857 hasOpenAccess W2325640857 @default.
• W2325640857 hasPrimaryLocation W23256408571 @default.
• W2325640857 hasRelatedWork W11242434 @default.
• W2325640857 hasRelatedWork W1989867524 @default.
• W2325640857 hasRelatedWork W1990857657 @default.
• W2325640857 hasRelatedWork W2013422844 @default.
• W2325640857 hasRelatedWork W2072521404 @default.
• W2325640857 hasRelatedWork W2134128872 @default.
• W2325640857 hasRelatedWork W2755568542 @default.
• W2325640857 hasRelatedWork W2892615779 @default.
• W2325640857 hasRelatedWork W2952526382 @default.
• W2325640857 hasRelatedWork W2188245770 @default.
• W2325640857 hasVolume "6" @default.
• W2325640857 isParatext "false" @default.
• W2325640857 isRetracted "false" @default.
• W2325640857 magId "2325640857" @default.
• W2325640857 workType "article" @default.