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Title: The influence of atypical lateralization of language in inhibitory control. An fMRI study. Session: Talk Speaker: Esteban Villar-Rodriguez Language production is typically left-lateralized in the inferior frontal cortex (IFC). Still, some individuals (mostly left-handers) have an atypical organization of language: either right-lateralized, or ambilateral. Previous studies have linked the atypical lateralization of language in these individuals with a mirrored organization of their other lateralized cognitive functions. However, the functioning of the right IFC (homologous to typical language) has never been explored.Here, we used fMRI to explore inhibitory control, which is mediated by a right-lateralized projection from the right IFC to the right subthalamic nucleus (STN). Our hypothesis is that inhibition will present a mirrored organization in the left hemisphere of atypically lateralized individuals.We preselected 86 left-handers, of whom 50 were typically lateralized for language, and 36 were atypically lateralized. We computed their functional asymmetry maps during a stop-signal task (inhibition paradigm), and compared them between both groups.Our results show that atypical lateralization of language is related to a mirrored brain organization of the whole inhibitory control network, including both cortical (right IFC, preSMA and parietal cortex) and subcortical regions (STN). Performance during the stop-signal task did not differ between groups.