Processing of sensory stimuli triggers changes in brain electrical activity characterized by increases in the centroparietal Late Positive Potential (LPP) and larger posterior alpha frequency desynchronization. Additionally, it has been showed that visual inspection parameters change during the presentation of emotional high arousing stimuli, suggesting orienting and attention allocation, in accordance with recent approaches suggesting that the processing of emotional stimuli requires attentional resources. Interestingly, indicators of visual scanning have been few used to determine engagement in tasks used as distractors during the processing of emotional images. This work aimed to analyze the effects of the attentional competence between the performance of a cognitive task and the processing of an emotionally arousing picture using EEG and Eye Tracking. Results showed that the superimposition of a cognitive task in a very reduced space of the visual field (1,2%) had an early attractor effect causing a reduction in the LPP amplitude, suggesting that the allocation of attentional resources is necessary for the processing of arousing images. Unexpectedly, the background image exploration was reassumed after participants responded to the task, particularly the unpleasant pictures. This effect can be attributed to the intrinsic significance of the emotional images.