Search for: [Abstract = "The aim of the present study was the estimation of localization differences of language specific areas for the native \(L1\) and the foreign \(L2\) language in the same person, and the influence of age of acquisition and proficiency level on activation patterns of language areas. 64 volunteers participated in the experiment. Mean age was 28 years. All participants of the experiment were divided into groups according to the age of acquisition and proficiency level of the foreign language. Block design method was used in the performed experiment. The experimental task was speech production in the form of sentences, the control tusk was silence. The experiment was performed using magnetic resonance Signa Horizon system \(GE Medical Systems, USA\) with 1,5 T magnetic field strength. Functional images were obtained using echoplanar sequence. It was demonstrated that during speech production in L1 and L2, activation occurred in cortical areas of the left hemisphere that included\: ventro\-lateral frontal areas \(inferior frontal gyrus, Rolandic operculum\), temporal lobe \(temporal pole, superior and middle temporal gyrus\), inferior part of cortex surrounding the lateral fissure \(precental and postcental gyrus\) and insula. Similar, but less extensive cortical areas surrounding the Sylvian fissure were activated in the right hemisphere. In the global results, contrast L1>L2 did not show any regi"]

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