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.