ブローカ野
Language acquisition appears to play a large role in the cortical organization involved in second language processing. Using functional magnetic resonance imaging (fMRI), representations of L1 and L2 have been found in spatially isolated parts of the left inferior frontal cortex of late learners (Broca's area). For early learners, similar parts of Broca's area are activated for both language—whereas later learners have shown to use different parts of Broca's area. In contrast, there is overlap in active regions of L1 and L2 within Wernicke's area, regardless of age of L2 acquisition.