A biophysical model of decision making in an antisaccade task through variable climbing activity

Cutsuridis, Vassilis and Kahramanoglou, Ioannis and Perantonis, Stavros and Evdokimidis, Ioannis and Smyrnis, Nikolaos (2005) A biophysical model of decision making in an antisaccade task through variable climbing activity. In: Artificial Neural Networks: Biological Inspirations – ICANN 2005, 11 - 15 September 2005, Warsaw, Poland.

Documents
ICANN2005.pdf
[img]
[Download]
[img]
Preview
PDF
ICANN2005.pdf - Whole Document

198kB
Item Type:Conference or Workshop contribution (Paper)
Item Status:Live Archive

Abstract

We present a biophysical model of saccade initiation based on
competitive integration of planned and reactive cortical saccade decision signals
in the intermediate layer of the superior colliculus. In the model, the variable
slopes of the climbing activities of the input cortical decision signals are
produced from variability in the conductances of Na+, K+, Ca2+ activated K+,
NMDA and GABA currents. These cortical decision signals are integrated in
the activities of buildup neurons in the intermediate layer of the superior
colliculus, whose activities grow nonlinearly towards a preset criterion level.
When the level is crossed, a movement is initiated. The resultant model
reproduces the unimodal distributions of saccade reaction times (SRTs) for
correct antisaccades and erroneous prosaccades as well as the variability of
SRTs (ranging from 80ms to 600ms) and the overall 25% of erroneous
prosaccade responses in a large sample of 2006 young men performing an
antisaccade task.

Keywords:computer model, antisaccade task, superior colliculus, accumulator model
Subjects:B Subjects allied to Medicine > B140 Neuroscience
G Mathematical and Computer Sciences > G730 Neural Computing
Divisions:College of Science > School of Computer Science
Related URLs:
ID Code:27746
Deposited On:30 Jun 2017 14:06

Repository Staff Only: item control page