Université de Fribourg

Dorsolateral prefrontal transcranial direct current stimulation modulates language processing but does not facilitate overt second language word production

Radman, Narges ; Britz, Juliane ; Buetler, Karin ; Weekes, Brendan S. ; Spierer, Lucas ; Annoni, Jean-Marie

In: Frontiers in Neuroscience, 2018, vol. 12, p. -

Word retrieval in bilingual speakers partly depends on executive-control systems in the left prefrontal cortex - including dorsolateral prefrontal cortex (DLPFC). We tested the hypothesis that DLPFC modulates word production of words specifically in a second language (L2) by measuring the effects of anodal transcranial direct current stimulation (anodal-tDCS) over the DLPFC on picture naming...

Université de Fribourg

Behavioral and electrophysiological signatures of word translation processes

Jost, Lea B. ; Radman, Narges ; A.Buetler, Karin ; Annoni, Jean-Marie

In: Neuropsychologia, 2018, vol. 109, p. 245–254

Translation is a demanding process during which a message is analyzed, translated and communicated from one language to another. Despite numerous studies on translation mechanisms, the electrophysiological processes underlying translation with overt production remain largely unexplored. Here, we investigated how behavioral response patterns and spatial-temporal brain dynamics differ in a...

Université de Fribourg

The role of the cognitive control system in recovery from bilingual aphasia: a multiple single-case fMRI study

Radman, Narges ; Mouthon, Michael ; Pietro, Marie Di ; Gaytanidis, Chrisovalandou ; Leemann, Beatrice ; Abutalebi, Jubin ; Annoni, Jean-Marie

In: Neural Plasticity, 2016, vol. 2016, p. e8797086

Aphasia in bilingual patients is a therapeutic challenge since both languages can be impacted by the same lesion. Language control has been suggested to play an important role in the recovery of first (L1) and second (L2) language in bilingual aphasia following stroke. To test this hypothesis, we collected behavioral measures of language production (general aphasia evaluation and picture...

Université de Fribourg

Language specificity of lexical-phonological therapy in bilingual aphasia: A clinical and electrophysiological study

Radman, Narges ; Spierer, Lucas ; Laganaro, Marina ; Annoni, Jean-Marie ; Colombo, Françoise

In: Neuropsychological Rehabilitation, 2016, vol. 26, no. 4, p. 532–557

Based on findings for overlapping representations of bilingual people's first (L1) and second (L2) languages, unilingual therapies of bilingual aphasia have been proposed to benefit the untrained language. However, the generalisation patterns of intra- and cross-language and phonological therapy and their neural bases remain unclear. We tested whether the effects of an intensive...

Université de Fribourg

Posterior SMA Syndrome following subcortical stroke: Contralateral akinesia reversed by visual feedback

Radman, Narges ; Cacioppo, Stephanie ; Spierer, Lucas ; Schmidlin, Eric ; Mayer, Eugène ; Annoni, Jean-Marie

In: Neuropsychologia, 2013, vol. 51, no. 13, p. 2605–2610

Background: The supplementary motor area (SMA) plays a key role in motor programming and production and is involved in internally-cued movements. In neurological populations, SMA syndrome following a lesion to the “SMA proper” is characterized by transient impairment of voluntary movements and motor sequences. This syndrome is assumed to follow on from an interruption of the motor...

Université de Fribourg

Poststroke fatigue following minor infarcts

Radman, Narges ; Staub, Fabienne ; Aboulafia-Brakha, Tatiana ; Berney, Alexandre ; Bogousslavsky, Julien ; Annoni, Jean-Marie

In: Neurology, 2012, p. -

Objective: To explore the potential relationship between fatigue following strokes and poststroke mood, cognitive dysfunction, disability, and infarct site and to determine the predictive factors in the development of poststroke fatigue (PSF) following minor infarcts.Methods: Ninety-nine functionally active patients aged less than 70 years with a first, nondisabling stroke (NIH Stroke Scale score...

Université de Fribourg

inter- and intrahemispheric dissociations in ideomotor apraxia: a large-Scale lesion–symptom mapping study in subacute brain-damaged patients

Manuel, Aurelie L. ; Radman, Narges ; Mesot, Delphine ; Chouiter, Leila ; Clarke, Stephanie ; Annoni, Jean-Marie ; Spierer, Lucas

In: Cerebral Cortex, 2012, p. -

Pantomimes of object use require accurate representations of movements and a selection of the most task-relevant gestures. Prominent models of praxis, corroborated by functional neuroimaging studies, predict a critical role for left parietal cortices in pantomime and advance that these areas store representations of tool use. In contrast, lesion data points to the involvement of left inferior...