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Brain-scale simulation of the neocortex on the IBM Blue Gene/L  supercomputer
KTH, Skolan för datavetenskap och kommunikation (CSC), Beräkningsbiologi, CB.
KTH, Skolan för datavetenskap och kommunikation (CSC), Beräkningsbiologi, CB.
KTH, Skolan för datavetenskap och kommunikation (CSC), Beräkningsbiologi, CB.
KTH, Skolan för datavetenskap och kommunikation (CSC), Beräkningsbiologi, CB.
Vise andre og tillknytning
2008 (engelsk)Inngår i: IBM Journal of Research and Development, ISSN 0018-8646, E-ISSN 2151-8556, Vol. 52, nr 1-2, s. 31-41Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Biologically detailed large-scale models of the brain can now be simulated thanks to increasingly powerful massively parallel supercomputers. We present an overview, for the general technical reader, of a neuronal network model of layers II/III of the neocortex built with biophysical model neurons. These simulations, carried out on an IBM Blue Gene/Le supercomputer, comprise up to 22 million neurons and 11 billion synapses, which makes them the largest simulations of this type ever performed. Such model sizes correspond to the cortex of a small mammal. The SPLIT library, used for these simulations, runs on single-processor as well as massively parallel machines. Performance measurements show good scaling behavior on the Blue Gene/L supercomputer up to 8,192 processors. Several key phenomena seen in the living brain appear as emergent phenomena in the simulations. We discuss the role of this kind of model in neuroscience and note that full-scale models may be necessary to preserve natural dynamics. We also discuss the need for software tools for the specification of models as well as for analysis and visualization of output data. Combining models that range from abstract connectionist type to biophysically detailed will help us unravel the basic principles underlying neocortical function.

sted, utgiver, år, opplag, sider
2008. Vol. 52, nr 1-2, s. 31-41
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-10492DOI: 10.1147/rd.521.0031ISI: 000253014700005Scopus ID: 2-s2.0-40849124518OAI: oai:DiVA.org:kth-10492DiVA, id: diva2:218111
Merknad
QC 20100709Tilgjengelig fra: 2009-05-19 Laget: 2009-05-19 Sist oppdatert: 2018-01-13bibliografisk kontrollert
Inngår i avhandling
1. Large-scale simulation of neuronal systems
Åpne denne publikasjonen i ny fane eller vindu >>Large-scale simulation of neuronal systems
2009 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

Biologically detailed computational models of large-scale neuronal networks have now become feasible due to the development of increasingly powerful massively parallel supercomputers. We report here about the methodology involved in simulation of very large neuronal networks. Using conductance-based multicompartmental model neurons based on Hodgkin-Huxley formalism, we simulate a neuronal network model of layers II/III of the neocortex. These simulations, the largest of this type ever performed, were made on the Blue Gene/L supercomputer and comprised up to 8 million neurons and 4 billion synapses. Such model sizes correspond to the cortex of a small mammal. After a series of optimization steps, performance measurements show linear scaling behavior both on the Blue Gene/L supercomputer and on a more conventional cluster computer. Results from the simulation of a model based on more abstract formalism, and of considerably larger size, also shows linear scaling behavior on both computer architectures.

sted, utgiver, år, opplag, sider
Stockholm: KTH, 2009. s. xii, 65
Serie
Trita-CSC-A, ISSN 1653-5723 ; 2009:06
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-10616 (URN)978-91-7415-323-1 (ISBN)
Disputas
2009-06-09, Sal F2, KTH, Lindstedtsvägen 26, Stockholm, 10:00 (engelsk)
Opponent
Veileder
Merknad

QC 20100722

Tilgjengelig fra: 2009-06-03 Laget: 2009-06-03 Sist oppdatert: 2018-01-13bibliografisk kontrollert

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