The essential of applying nonlinear-analysis to validate experiments, assessing superior brain functions: Case-study of a Bayesian-Model of inhibitory control in ADHD

Samea, Fateme; Nejati, Vahid; Eshaghi Gordji, Madjid; Khosrowabadi, Reza

doi:10.22075/ijnaa.2019.18175.1992

The essential of applying nonlinear-analysis to validate experiments, assessing superior brain functions: Case-study of a Bayesian-Model of inhibitory control in ADHD

Document Type : Research Paper

Authors

Fateme Samea ¹

Vahid Nejati ¹

Madjid Eshaghi Gordji ¹^{, 2}

Reza Khosrowabadi ¹

¹ Institute for Cognitive and Brain Sciences, Shahid Beheshti University, Tehran, Iran

² Department of Mathematics, Faculty of Mathematics, Statistics and Computer Science, Semnan University, Semnan, Iran

10.22075/ijnaa.2019.18175.1992

Abstract

In the last decades, nonlinear methods have been applied, in a large number of studies from the computational neuroscience field, to describe neuronal implementations of superior brain functions. Superior brain functions, called cognitive functions, control our behavior. Therefore, they should be assessed by evaluating individual performances in the experiments, using standard tasks, which represent the condition that cognitive functions are required. The mathematical models of cognitive functions, at the neuronal implementation level, are based on the real condition of standard cognitive tasks. However, it is not validated whether applied task conditions are appropriate to represent the neuronal implementation of a cognitive function. Hence, as a case study, we used a developed Bayesian Model to assess whether the GoNoGo task is valid to be applied for neural measurement and modeling neural implementation of Inhibitory Control (IC). As GoNoGo is the most common task used for neural measurement of impaired cognitive function (IC) in ADHD, we fit the model to behavioral data of two groups of children/adolescents with and without ADHD. The results demonstrated that the model could simulate the behavioral data, and also the model parameters could differentiate the groups significantly. However, the neural implementation of IC may not be represented through the rewarded condition of the GoNoGo task. We concluded that before modeling the neural implementation of cognitive functions, it is essential to apply nonlinear methods to validate current behavioral experiments computationally; or to design new model-based experiments for use in neural measurements.

Keywords

Nonlinear-Analysis

Neurocognitive Experiment

Bayesian Model

Cognitive Functions

GoNOGO

ADHD

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