Neural Mechanism of Risk Preference by Cigarette Smoking

Research Project

Project/Area Number	26705001
Research Category	Grant-in-Aid for Young Scientists (A)
Allocation Type	Partial Multi-year Fund
Research Field	Economic theory
Research Institution	Keiai University (2016) Otemon Gakuin University (2015) Kyoto University (2014)
Principal Investigator	Yoneda Hiroyasu 敬愛大学, 経済学部, 講師 (90709312)
Project Period (FY)	2014-04-01 – 2017-03-31
Project Status	Completed (Fiscal Year 2016)
Budget Amount *help	¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000) Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000) Fiscal Year 2015: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000) Fiscal Year 2014: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywords	fMRI / 行動経済学 / 神経経済学 / 意思決定 / 経済理論
Outline of Final Research Achievements	According to delay discount model, immediate reward (t=0) and sure reward (p=1) are not discounted. We investigate both overlapping and distinct neural mechanism involved in decision making. Main result are as follows. (1) The reward processing for immediate and sure reward is not always same neural mechanism. But neural mechanism for evaluating certainty reward partially overlapped with immediate one. (2) As some research point out, many areas of the default network (PCC, mPFC, parahippocampal cortex) have also been found to be active in tasks involving intertemporal choice. (3) Part of parietal cortex (BA40, particularly left) plays a crucial role in decision making.