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Review
. 2015 Feb;21(1):120-33.
doi: 10.1080/13554794.2013.873063. Epub 2014 Jan 13.

Reward processing in neurodegenerative disease

David C Perry  1 , Joel H Kramer
Affiliations
Review

Reward processing in neurodegenerative disease

David C Perry et al. Neurocase. 2015 Feb.

Abstract

Representation of reward value involves a distributed network including cortical and subcortical structures. Because neurodegenerative illnesses target specific anatomic networks that partially overlap with the reward circuit, they would be predicted to have distinct impairments in reward processing. This review presents the existing evidence of reward processing changes in neurodegenerative diseases including mild cognitive impairment (MCI), Alzheimer's disease, frontotemporal dementia, amyotrophic lateral sclerosis (ALS), Parkinson's disease, and Huntington's disease, as well as in healthy aging. Carefully distinguishing the different aspects of reward processing (primary rewards, secondary rewards, reward-based learning, and reward-based decision-making) and using tasks that differentiate the stages of processing reward will lead to improved understanding of this fundamental process and clarify a contributing cause of behavioral change in these illnesses.

Keywords: dementia; neurodegenerative disease; reward.

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Figures

Figure 1
Figure 1. Key reward circuit structures and pathways that can be affected in neurodegenerative disease
See this image and copyright information in PMC

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