The Bernstein Center Freiburg

Informal Seminar
Leonidas Richter

Bernstein Center Freiburg

Modelling contextual modulations
in functional recurrent networks

The response of visual cortical neurons to a stimulus is modulated by the context in which this stimulus occurs. An important case in the primary visual cortex (V1) is the modulation of the response to a drifting grating by the surrounding structure of the stimulus. These surround modulations are hypothesised to stem, at least partially, from recurrent dynamics within the neocortex. We asked the question, what can be derived from a simple model of interacting networks that includes both the cortical patch which is driven by the centre and that one which is driven by the surround of a stimulus. To this end we built, based on experimental knowledge on the structure of V1, a simple model of two random networks with locally dominant inhibition and mutual excitatory coupling, and investigated its structural properties and mean responses.

Tuesday, January 13, 2015

14:30 h
BCF Seminar Room "Casino"
Hansastr. 9a
The talk is open to the public. Guests are cordially invited!