Table 1: Reward-related behaviors in patients with chronic pain.

StudyDisordersTestMeasurementResults

Geha et al. [11]Back painRating sugary drinksLikingNo change
WantingNo change
SweetnessNo change
IntensityNo change
Rating fat puddingsLikingDecrease
WantingNo change
SweetnessNo change
IntensityNo change
Small and Apkarian [18]Low back painRating sucrose solutionPleasantnessNo change
IntensityIncrease
Marbach and Lund [21]Facial pain and TMJ painPASAnhedoniaIncrease
Marbach et al. [22]Back pain or facial painPASAnhedoniaUncorrelated to pain intensity
Elvemo et al. [25]VariousBIS/BASReward driveNo change
BDIAnhedoniaIncrease
BIS/BASRERDecrease
Becerra-Garcia and Robles Jurado [24]FibromyalgiaSPSRQRERDecrease
Claes et al. [28]FibromyalgiaSemistructured interviewGoal conflictsIncrease
Hardy et al. [32]FibromyalgiaDaily diaryGoal conflictsIncrease
Mun et al. [10]Not mentionedDaily diaryGoal conflictsIncrease

Abbreviations: TMJ, temporomandibular joint; PAS, Physical Anhedonia Scale; BIS, Behavioral Inhibition Scale; BAS, Behavioral Activation Scale; BDI, Beck Depression Inventory; SPSRQ, Sensitivity to Punishment and Sensitivity to Reward Questionnaire; RER, reward-induced emotional responsiveness.