Multisensory integration in the superior colliculus: a neural network model (Ursino et al. 2009)

 Download zip file 
Help downloading and running models
Accession:118261
" ... The model includes three distinct neural areas: two unimodal areas (auditory and visual) are devoted to a topological representation of external stimuli, and communicate via synaptic connections with a third downstream area (in the SC) responsible for multisensory integration. The present simulations show that the model, with a single set of parameters, can mimic various responses to different combinations of external stimuli including the inverse effectiveness, both in terms of multisensory enhancement and contrast, the existence of within- and cross-modality suppression between spatially disparate stimuli, a reduction of network settling time in response to cross-modal stimuli compared with individual stimuli. ..."
Reference:
1 . Ursino M, Cuppini C, Magosso E, Serino A, di Pellegrino G (2009) Multisensory integration in the superior colliculus: a neural network model. J Comput Neurosci 26:55-73 [PubMed]
Citations  Citation Browser
Model Information (Click on a link to find other models with that property)
Model Type: Realistic Network;
Brain Region(s)/Organism: Superior colliculus;
Cell Type(s):
Channel(s):
Gap Junctions:
Receptor(s):
Gene(s):
Transmitter(s):
Simulation Environment: MATLAB;
Model Concept(s): Activity Patterns; Vision; Audition;
Implementer(s):
close all


Nv1=41;
Nv2=41;
Rv=cell(Nv1,Nv2);
V0=1;
sv=1.5; 

lv=[1:1:Nv1]';
kv=[1:1:Nv2];
Rigv=ones(1,Nv2); 
Colv=ones(Nv1,1); 
for i = 1:Nv1,
    
    y0v=i;
    for j=1:Nv2,
    
    x0v=j;
    distanzav_x=abs(kv-x0v);
    controllo_distv_x=double((abs(kv-x0v)>(Nv2/2)));
    distanzav_y=abs(lv-y0v);
    controllo_distv_y=double((abs(lv-y0v)>(Nv1/2)));
    D2v=((distanzav_y-sign(controllo_distv_y)*Nv1).^2)*Rigv+Colv*((distanzav_x-sign(controllo_distv_x)*Nv2).^2);% matrice delle distanze al quadrato FORMA CIRCOLARE
    Rv{i,j}= V0*exp(-D2v/2/sv/sv);
    end
end 
% figure
% imagesc(Rv{2,20})