A biophysical neural accumulator model of decision making in an antisaccade task

Authors:
Vassilis Cutsuridis;Ioannis Kahramanoglou;Nikolaos Smyrnis;Ioannis Evdokimidis;Stavros Perantonis
Affiliations:
Computational Intelligence Laboratory, Institute of Informatics and Telecommunications, National Center for Scientific Research "Demokritos", Agia Paraskevi, Athens GR-15310, Greece;Computational Intelligence Laboratory, Institute of Informatics and Telecommunications, National Center for Scientific Research "Demokritos", Agia Paraskevi, Athens GR-15310, Greece;Cognition and Action Group, Neurology Department, National University of Athens, Aeginition Hospital, 72 Vas Sofias Ave., Athens GR-11528, Greece and Psychiatry Department, National University of ...;Cognition and Action Group, Neurology Department, National University of Athens, Aeginition Hospital, 72 Vas Sofias Ave., Athens GR-11528, Greece;Computational Intelligence Laboratory, Institute of Informatics and Telecommunications, National Center for Scientific Research "Demokritos", Agia Paraskevi, Athens GR-15310, Greece
Venue:
Neurocomputing
Year:
2007

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Abstract

A biophysical cortico-colicular model of saccade initiation based on competitive integration of planned and reactive cortical saccade decision signals in the intermediate layer of the superior colliculus is introduced. The variable slopes of the climbing activities of the input cortical decision signals are produced from variability in the ionic and synaptic conductances of cortical neurons. The model reproduces the unimodal distributions of saccade reaction times for correct antisaccades and erroneous prosaccades as well as the variability of saccade reaction times and the overall error probabilities in a large sample of 2006 young men performing an antisaccade task.