People with ADHD, binge-eating behaviours and impulse control disorders appear to have common neurobiology: underactive prefrontal cortex and subcortical formations as well as involved occipital and parietal brain regions are linked to the reward system associated with negative emotional states, in response to the received reward and impulsivity/loss of control.

Karen E. Seymour et al. Overlapping neurobehavioral circuits in ADHD, obesity, and binge eating: Evidence from Neuroimaging Research. CNS Spectr. 2015 Aug; 20(4): 401-411.