Scientific Article
previous document  unige:17902  next document
add to browser collection

Noise-enhanced computation in a model of a cortical column

Gerstner, Wulfram
Published in Neuroreport. 2005, vol. 16, no. 11, p. 1237-40
Abstract Varied sensory systems use noise in order to enhance detection of weak signals. It has been conjectured in the literature that this effect, known as stochastic resonance, may take place in central cognitive processes such as memory retrieval of arithmetical multiplication. We show, in a simplified model of cortical tissue, that complex arithmetical calculations can be carried out and are enhanced in the presence of a stochastic background. The performance is shown to be positively correlated to the susceptibility of the network, defined as its sensitivity to a variation of the mean of its inputs. For nontrivial arithmetic tasks such as multiplication, stochastic resonance is a collective property of the microcircuitry of the model network.
Keywords Cerebral Cortex/cytology/physiologyComputer SimulationHumansModels, NeurologicalNeural Networks (Computer)Neurons/physiologyNoiseStochastic Processes
PMID: 16012356
Full text
Research group Psycholinguistique
(ISO format)
MAYOR, Julien, GERSTNER, Wulfram. Noise-enhanced computation in a model of a cortical column. In: Neuroreport, 2005, vol. 16, n° 11, p. 1237-40.

156 hits

0 download


Deposited on : 2011-12-22

Export document
Format :
Citation style :