[psychology-visionlist] Fwd: [Maths-CMMB] [reminder] CMMB seminar 21 February - James Rankin

[Denis Schluppeck]

Dear all,

… the following talk about Pattern formation in a neural field model of visual cortex might be of interest to some of you.

I would have gone, but have to be at Psych for MSc teaching…

Best
Denis

..
Denis Schluppeck
denis.schluppeck at nottingham.ac.uk<mailto:denis.schluppeck at nottingham.ac.uk>



Begin forwarded message:

From: Etienne Farcot <etienne.farcot at nottingham.ac.uk<mailto:etienne.farcot at nottingham.ac.uk>>
Subject: [Maths-CMMB] [reminder] CMMB seminar 21 February - James Rankin
Date: 20 February 2017 at 11:51:38 GMT
To: "maths-seminars-announce at lists.nottingham.ac.uk<mailto:maths-seminars-announce at lists.nottingham.ac.uk>" <maths-seminars-announce at lists.nottingham.ac.uk<mailto:maths-seminars-announce at lists.nottingham.ac.uk>>, CMMB list <maths-cmmb at lists.nottingham.ac.uk<mailto:maths-cmmb at lists.nottingham.ac.uk>>

Dear all,


Tomorrow for the CMMB seminar we will have the pleasure of receiving James Rankin, from the University of Exeter.


The seminar will be at 2pm in room Physics-B21, University Park.



Pattern formation in a neural field model of visual cortex

We study localised states in the neural field equation (NFE) posed on the Euclidean plane. The resulting nonlocal integro-differential equation has been widely used to model the mean firing rates of neurons across a spatially continuous domain. Primary visual cortex features a quasiperiodic orientation preference map with a regular length scale. Voltage imaging experiments have shown that local, oriented visual stimuli elicit activation that is orientation-selective and patchy within the stimulus footprint but non-selective outside the footprint. We study the dynamics of these input-driven states in a model with a biologically-motivated radial connectivity profile and sub-populations encoding different orientations. We argue that the observed patchy cortical activation patterns are pre-encoded by the connectivity profile and that the orientation preference map fixes the spatial phase of such patterns.


Let us know if you would like to meet the speaker in person.


Best wishes,

Etienne and Bindi

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