Talmi, D and Seymour, B and Dayan, P and Dolan, RJ (2008) Human pavlovian-instrumental transfer. J Neurosci, 28. pp. 360-368.Full text not available from this repository.
The vigor with which a participant performs actions that produce valuable outcomes is subject to a complex set of motivational influences. Many of these are believed to involve the amygdala and the nucleus accumbens, which act as an interface between limbic and motor systems. One prominent class of influences is called pavlovian-instrumental transfer (PIT), in which the motivational characteristics of a predictor influence the vigor of an action with respect to which it is formally completely independent. We provide a demonstration of behavioral PIT in humans, with an audiovisual predictor of the noncontingent delivery of money inducing participants to perform more avidly an action involving squeezing a handgrip to earn money. Furthermore, using functional magnetic resonance imaging, we show that this enhanced motivation was associated with a trial-by-trial correlation with the blood oxygenation level-dependent (BOLD) signal in the nucleus accumbens and a subject-by-subject correlation with the BOLD signal in the amygdala. Our data dovetails well with the animal literature and sheds light on the neural control of vigor.
|Uncontrolled Keywords:||Adult Analysis of Variance Brain Brain Mapping Conditioning, Classical Conditioning, Operant Female Humans Image Processing, Computer-Assisted Magnetic Resonance Imaging Male Motivation Oxygen Transfer (Psychology)|
|Divisions:||Div F > Computational and Biological Learning|
|Depositing User:||Cron Job|
|Date Deposited:||07 Mar 2014 11:26|
|Last Modified:||31 Jan 2015 05:45|