Publication Date:
2013-08-03
Description:
Whereas reward (appetitiveness) and aversiveness (punishment) have been distinguished as two discrete dimensions within psychology and behavior, physiological and computational models of their neural representation have treated them as opposite sides of a single continuous dimension of "value." Here, I show that although dopamine neurons of the primate ventral midbrain are activated by evidence for reward and suppressed by evidence against reward, they are insensitive to aversiveness. This indicates that reward and aversiveness are represented independently as two dimensions, even by neurons that are closely related to motor function. Because theory and experiment support the existence of opponent neural representations for value, the present results imply four types of value-sensitive neurons corresponding to reward-ON (dopamine), reward-OFF, aversive-ON, and aversive-OFF.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fiorillo, Christopher D -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2013 Aug 2;341(6145):546-9. doi: 10.1126/science.1238699.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Bio and Brain Engineering, KAIST (Korea Advanced Institute of Science and Technology), Yuseong-gu, Daejeon, Republic of Korea. fiorillo@kaist.ac.kr〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23908236" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
Appetitive Behavior/*physiology
;
Conditioning, Classical/physiology
;
Dopaminergic Neurons/*physiology
;
Female
;
Macaca mulatta
;
Male
;
Mesencephalon/cytology/*physiology
;
Punishment/*psychology
;
*Reward
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
