Differential neural mechanisms underlying temporal discounting of financial gain and loss = 금전적 이익과 손실에 대한 인간의 시점 간 선택의 신경 메커니즘 규명

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The decision-making process of humans has been investigated by several disciplines including economics, psychology, neuroscience, and recently collaborated endeavors called neuroeconomics. Among variables involved in the complex process, valence and time play a key role in diverse decision-making situations. Previous studies in neuroscience, in addition to economics, have explored neural mechanisms underlying intertemporal choice, in particular, temporal discounting of primary or secondary rewards. However, it remains elusive whether temporal discounting of financial loss is different from that of financial gain at behavioral and neuronal level. In this study, we used functional Magnetic Resonance Imaging (fMRI) to examine neural mechanisms underpinning the temporal discounting of financial losses with a serial decision-making model. As a result, shape of the discounting function in the aversive frame is hyperbolic as in the appetitive context. However, a decay rate of the hyperbolic discounting function in the domain of loss is smaller than that in the gain domain. In addition, neural activities in posterior cingulate cortex (PCC), medial prefrontal cortex (mPFC), caudate nucleus, and substantia nigra (SN) represent subjective values or their differentials of financial gains. In the aversive frame, mPFC, dorsolateral prefrontal cortex (DLPFC), and ventral striatum (VS) are implicated in the estimation of the subjective values and their differentials. These findings contribute to a better understanding of human economic behavior, and open the door for further studies to dissociate the high-level intertemporal choice from other related behaviors such as self-control, uncertainty, time perception.
Advisors
Jeong, Jae-seungresearcher정재승researcherLee, Do-heonresearcher이도헌researcher
Description
한국과학기술원 : 바이오및뇌공학과,
Publisher
한국과학기술원
Issue Date
2008
Identifier
296162/325007  / 020063268
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 바이오및뇌공학과, 2008.2, [ iii, 46 p. ]

Keywords

intertemporal choice; temporal discounting; decision-making; fMRI; financial loss; 시점 간 선택; 지연 할인; 의사결정; 기능성자기공명영상; 금전적 손실; intertemporal choice; temporal discounting; decision-making; fMRI; financial loss; 시점 간 선택; 지연 할인; 의사결정; 기능성자기공명영상; 금전적 손실

URI
http://hdl.handle.net/10203/27149
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=296162&flag=dissertation
Appears in Collection
BiS-Theses_Master(석사논문)
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