Basal ganglia lateralization in different types of reward
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ORIGINAL RESEARCH
Basal ganglia lateralization in different types of reward Marie Arsalidou 1,2
&
Sagana Vijayarajah 3 & Maksim Sharaev 4
# Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Reward processing is a fundamental human activity. The basal ganglia are recognized for their role in reward processes; however, specific roles of the different nuclei (e.g., nucleus accumbens, caudate, putamen and globus pallidus) remain unclear. Using quantitative meta-analyses we assessed whole-brain and basal ganglia specific contributions to money, erotic, and food reward processing. We analyzed data from 190 fMRI studies which reported stereotaxic coordinates of whole-brain, within-group results from healthy adult participants. Results showed concordance in overlapping and distinct cortical and sub-cortical brain regions as a function of reward type. Common to all reward types was concordance in basal ganglia nuclei, with distinct differences in hemispheric dominance and spatial extent in response to the different reward types. Food reward processing favored the right hemisphere; erotic rewards favored the right lateral globus pallidus and left caudate body. Money rewards engaged the basal ganglia bilaterally including its most anterior part, nucleus accumbens. We conclude by proposing a model of common reward processing in the basal ganglia and separate models for money, erotic, and food rewards. Keywords Rewards . fMRI . Meta-analyses . Striatum . Basal ganglia
The prospect of reward is a significant motivator in all species. Both animals and humans modulate their behavior to achieve potential rewards. External factors such as the perceived value, contextual circumstances and reward quantity can influence how individuals approach rewarding situations (Green and Myerson 2004). Importantly, examining both the behavioral and neural mechanisms that support reward behavior will further our understanding of the decision-making, reasoning, and introspection processes that impact our reward motivated behaviors. Past work on the neural mechanisms that support reward processing have found basal ganglia—a cluster of gray matter nuclei located at the base of the forebrain—respond to monetary (Hardin et al. 2009), erotic (Kim et al. 2006), and
* Marie Arsalidou [email protected] 1
Department of Psychology, National Research University Higher School of Economics, Moscow, Russian Federation
2
Department of Psychology, Faculty of Health, York University, Toronto, ON, Canada
3
Department of Psychology, Faculty of Arts and Science, University of Toronto, Toronto, ON, Canada
4
Skolkovo Institute of Science and Technology, Moscow, Russian Federation
food (Grabenhorst et al. 2010) rewards. A recent functional magnetic resonance imaging (fMRI) meta-analysis suggests there is variability in hemispheric lateralization in rewards tasks (Arsalidou et al. 2013), however, a direct test of this lateralization across reward types has not been reported. Specifically, despite increased interest in the ba
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