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Modelling Low Dimensional Neural Activity
KTH, School of Computer Science and Communication (CSC), Computational Science and Technology (CST). KTH, School of Computer Science and Communication (CSC), Computational Biology, CB.
2016 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Modellering av lågdimensionell neural aktivitet (Swedish)
Abstract [en]

A number of recent studies have shown that the dimensionality of the neural activity in the cortex is low. However, what network structures are capable of producing such activity is not theoretically well understood. In this thesis, I discuss a few possible solutions to this problem, and demonstrate that a network with a multidimensional attractor can give rise to such low dimensional activity. The network is created using the Neural Engineering Framework, and exhibits several biologically plausible features, including a log-normal distribution of the synaptic weights.

Abstract [sv]

Ett antal nyligen publicerade studier has visat att dimensionaliten för neural aktivitet är låg. Dock är det inte klarlagt vilka nätverksstrukturer som kan uppbringa denna typ av aktivitet. I denna uppsats diskuterar jag möjliga lösningsförslag, och demonstrerar att ett nätverk med en flerdimensionell attraktor ger upphov till lågdimensionell aktivitet. Nätverket skapas med hjälp av the Neural Engineering Framework, och uppvisar ett flertal biologiskt trovärdiga egenskaper. I synnerhet är fördelningen av synapsvikter log-normalt fördelad.

Place, publisher, year, edition, pages
2016. , 41 p.
Keyword [en]
neural networks, low dimensional, neural, activity, neural engineering framework, NEF, nef, artificial neural network, ann, dimensionality, log-normal, log, normal, distribution, synaptic, geometric, connectivity
National Category
Bioinformatics (Computational Biology)
URN: urn:nbn:se:kth:diva-185317OAI: diva2:920068
Subject / course
Computer Science
Educational program
Master of Science in Engineering -Engineering Physics
2016-04-07, F0, Lindstedtsvägen 24, Stockholm, 15:15 (English)
Available from: 2016-04-19 Created: 2016-04-15 Last updated: 2016-04-19Bibliographically approved

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