Impulsivity is a multi-dimensional construct of behaviors. Here we compared two cohorts of impulsive and control children. Both groups underwent a functional magnetic resonance imaging experiment which food related odor cues. Activations were larger for the impulsive group in: temporal lobe, cerebellum, supplementary motor area, frontal cortex, medial cingulate cortex, insula, precuneus, precentral, para-hippocampal & clacarine. Connectivity results showed that emotional reward based on the smell and processed in temporal lobes was the main cue driving impulsive children. This was followed by a focused attention and sensations of comfort and happiness modulated by precuneus and cingulum.