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Patterns of theta-synchronization over the course of a perceptual decision-making task

Houtman, S. J. (2014) Patterns of theta-synchronization over the course of a perceptual decision-making task. Bachelor's Thesis, Artificial Intelligence.

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Many studies have investigated the neural correlates of perceptual decision making. It has been found that several cortical regions are involved in the decision-making process, but how the different regions interact to produce the final decision is unclear. At the beginning of the decision, the emphasis lies on shuttling information from perceptual regions to regions in which evidence accumulation takes place, while towards the end, the accumulated evidence has to be transferred to regions that implement the motor response. In EEG, interaction between brain regions is thought to be reflected in synchronization of brain oscillations. Since previous studies have shown that the dynamics of evidence accumulation for perceptual decisions is reflected in the amplitude of 4-9 Hz theta oscillations, the focus was on whether different stages of the decision process would show a shift in patterns of synchronization in this frequency band. Using two different methods of computing oscillatory synchronization, the results showed that there was indeed a difference between the set of synchronized regions at the beginning vs. the end of the decision.

Item Type: Thesis (Bachelor's Thesis)
Supervisor name: Vugt, M.K. van
Degree programme: Artificial Intelligence
Thesis type: Bachelor's Thesis
Language: English
Date Deposited: 15 Feb 2018 07:56
Last Modified: 02 May 2019 11:21

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