“…Unlike acute pain, patients with chronic pain are frequently associated with depression (Breivik, Collett, Ventafridda, Cohen, & Gallacher, ; Gureje et al, ), which leads to clinically manifested anhedonia and diminished motivation for natural reinforcers. As a result, chronic pain patients may exhibit social withdrawal behaviors, such as reduced empathy (Peng et al, ) and dissatisfaction with social activities (Kerns, Rosenberg, & Otis, ). These findings support a combined reward deficiency and antireward model in pain chronification (Borsook et al, ).…”