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Neural Basis of Subjects’ Fluency in Episodic Future Thinking: a resting-state fMRI Study
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  • Fatemeh Eivazi,
  • Alireza Moradi,
  • Javad Hatami,
  • Alireza Fallahi,
  • Mohammad-Reza Nazem-Zadeh
Fatemeh Eivazi
Shahid Beheshti University
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Alireza Moradi
Kharazmi University Faculty of Psychology and Educational Sciences
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Javad Hatami
University of Tehran
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Alireza Fallahi
Hamedan University of Technology
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Mohammad-Reza Nazem-Zadeh
Tehran University of Medical Sciences

Corresponding Author:[email protected]

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Abstract

Purpose: To investigate the neural substrates underlying the fluency of future thoughts in episodic future thinking by investigating the functional connectivity of the brain. So far, the neural basis of the specificity of future representations has been studied, while there is a fair amount of evidence toward functions of fluency of future thoughts on various disorders and behaviors. Method: The resting-state fMRI data of fifteen right-handed adults (female=8, male=7) aged 25 to 40 years (M age=31.8.16, SD age=5.6) was analyzed to extract the graph theoretical measure of nodal degrees in the default mode network (DMN) nodes. The correlational analysis was conducted between the nodal degrees and the measure of fluency of the future thoughts examined by the personal future task (PFT). Results: Findings indicated a significant correlation between fluency of future thoughts and nodal degree of middle temporal, inferior parietal, and posterior cingulate gyri, as well as precuneus. Discussion and Conclusion: Brain areas delineated in this study were consistent with brain activations during the construction of future representations identified in previous studies, but not akin to areas related to the elaboration phase of future thinking. This could be due to the differences between the tasks measuring the fluency, rather than the specificity of future thoughts.