?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=A+feedback+model+of+visual+attention&rft.creator=Spratling%2C+M+W&rft.creator=Johnson%2C+M+H&rft.subject=Neural+Modelling&rft.subject=Computational+Neuroscience&rft.subject=Neural+Nets&rft.subject=Perceptual+Cognitive+Psychology&rft.description=Feedback+connections+are+a+prominent+feature+of+cortical+anatomy+and+are+likely%0Ato+have+significant+functional+role+in+neural+information+processing.+We+present%0Aa+neural+network+model+of+cortical+feedback+that+successfully+simulates%0Aneurophysiological+data+associated+with+attention.+In+this+domain+our+model+can%0Abe+considered+a+more+detailed%2C+and+biologically+plausible%2C+implementation+of+the%0Abiased+competition+model+of+attention.++However%2C+our+model+is+more+general+as+it%0Acan+also+explain+a+variety+of+other+top-down+processes+in+vision%2C+such+as%0Afigure%2Fground+segmentation+and+contextual+cueing.+This+model+thus+suggests+that%0Aa+common+mechanism%2C+involving+cortical+feedback+pathways%2C+is+responsible+for+a%0Arange+of+phenomena+and+provides+a+unified+account+of+currently+disparate+areas%0Aof+research.%0A&rft.date=2004&rft.type=Journal+(Paginated)&rft.type=PeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Fcogprints.org%2F3542%2F1%2Fcog_neurosci.pdf&rft.identifier=++Spratling%2C+M+W+and+Johnson%2C+M+H++(2004)+A+feedback+model+of+visual+attention.++%5BJournal+(Paginated)%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F3542%2F