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2000

Integrating Top-Down and Bottom-Up Sensory Processing by Somato-Dendritic Interactions

11 years 9 months ago
Integrating Top-Down and Bottom-Up Sensory Processing by Somato-Dendritic Interactions
The classical view of cortical information processing is that of a bottom-up process in a feedforward hierarchy. However, psychophysical, anatomical, and physiological evidence suggests that top-down effects play a crucial role in the processing of input stimuli. Not much is known about the neural mechanisms underlying these effects. Here we investigate a physiologically inspired model of two reciprocally connected cortical areas. Each area receives bottom-up as well as top-down information. This information is integrated by a mechanism that exploits recent findings on somato-dendritic interactions. (1) This results in a burst signal that is robust in the context of noise in bottom-up signals. (2) Investigating the influence of additional top-down information, priming-like effects on the processing of bottom-up input can be demonstrated. (3) In accordance with recent physiological findings, interareal coupling in low-frequency ranges is characteristically enhanced by top-down mechanism...
Markus Siegel, Konrad P. Körding, Peter K&oum
Added 18 Dec 2010
Updated 18 Dec 2010
Type Journal
Year 2000
Where JCNS
Authors Markus Siegel, Konrad P. Körding, Peter König
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