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Abstract #3225

A Framework for Investigating Decision-Making in the Brain with High Spatio-Temporal Resolution Using Simultaneous EEG/fMRI and Joint ICA

Sreenath Pruthviraj Kyathanahally1, Nurhan Erbil1, Ana Maria Franco-Watkins2, Xiaoxia Zhang1, Vince D. Calhoun3, 4, Gopikrishna Deshpande1, 2

1AU MRI Research Center, Department of Electrical and Computer Engineering, Auburn University, Auburn, AL, United States; 2Department of Psychology, Auburn University, Auburn, AL, United States; 3The Mind Research Network and Lovelace Biomedical and Environmental Research Institute, Albuquerque, NM, United States; 4Department of Electrical and Computer Engineering, University of New Mexico, Albuquerque, NM, United States

Many decisions involve making intertemporal choices but the basic mechanisms underlying intertemporal choice remain poorly understood and under-examined.In this study, we investigate the spatio-temporal dynamics of neural substrates of intertemporal decision making by acquiring simultaneous EEG/fMRI along with a novel decision making paradigm that relies on rewards and costs with varying probabilities.Six participants completed different decision tasks and the simultaneous EEG/fMRI data was acquired. A first level analysis followed by second level analysis was done .Results showed the reward-related positivity and negativity, both prior to and after the decision making point.

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