“…Functional connectivity of the putamen with the insula and parietal cortex is disrupted in youth with internet gaming disorder, a condition frequently comorbid with ADHD (Hong et al, ). In particular, ADHD is associated with reduction in GMV or lesions in the putamen (Ellison‐Wright, Ellison‐Wright, & Bullmore, ; Greven et al, ; Herskovits et al, ; Khadka et al, ; Luo, Mao, Shi, Wang, & Li, ; Max et al, ; Seidman et al, ; Sobel et al, ; Valera, Faraone, Murray, & Seidman, ; Xu et al, ). In healthy subjects, the right putamen is frequently smaller than left putamen (Wellington, Semrud‐Clikeman, Gregory, Murphy, & Lancaster, ); however, children with ADHD more frequently have a smaller left putamen than the right‐hemispheric counterpart; this reversal of symmetry may relate to ADHD symptomology (Wellington et al, ).…”