Lateralizing language function with pre-operative functional magnetic resonance imaging in early proficient bilingual patients

Połczyńska, Monika; Japardi, Kevin; Bookheimer, Susan Y.

doi:10.1016/j.bandl.2017.03.002

Cited by 31 publications

(26 citation statements)

References 74 publications

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“…Despite an emerging literature on the effects of bilingualism on structural and functional brain networks, the effects of bilingualism on structural neuroplasticity in patients with temporal lobe epilepsy (TLE) have not been well addressed. Electrical stimulation mapping and functional magnetic resonance imaging (MRI) studies of bilingual patients with epilepsy have shown that primary (L1) and secondary (L2) languages differ in anatomical distribution, with language‐specific sites activating for L2 but not for L1 . Thus, bilingualism may lead to differences in functional reorganization of language networks in individuals with epilepsy, and it is possible that bilingualism results in changes to other cognitive networks in TLE as well.…”

Section: Introductionmentioning

confidence: 99%

Does bilingualism increase brain or cognitive reserve in patients with temporal lobe epilepsy?

et al. 2018

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Section: Introductionmentioning

confidence: 99%

Does bilingualism increase brain or cognitive reserve in patients with temporal lobe epilepsy?

et al. 2018

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“…The fact that representations of spoken word forms were identified in the right, but not left anterior STG, is unexpected. One possibility is that it is due to the greater involvement of right hemisphere structures in language processing in early bilinguals 49 .…”

Section: Discussionmentioning

confidence: 99%

Evidence for shared conceptual representations for sign and speech

Evans

Price

Diedrichsen

et al. 2019

Preprint

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Do different languages evoke different conceptual representations? If so, greatest divergence might be expected between languages that differ most in structure, such as sign and speech. Unlike speech bilinguals, hearing sign-speech bilinguals use languages conveyed in different modalities. We used functional magnetic resonance imaging and representational similarity analysis (RSA) to quantify the similarity of semantic representations elicited by the same concepts presented in spoken British English and British Sign Language in hearing, early sign-speech bilinguals. We found shared representations for semantic categories in left posterior middle and inferior temporal cortex. Despite shared category representations, the same spoken words and signs did not elicit similar neural patterns. Thus, contrary to previous univariate activation-based analyses of speech and sign perception, we show that semantic representations evoked by speech and sign are only partially shared. This demonstrates the unique perspective that sign languages and RSA provide in understanding how language influences conceptual representation.

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“…An important generalization, reviewed in Mazurek and Schieber (2019), is that using DES to map function in the brain critically depends on the patient being able to focus on and be engaged by an appropriate task. The type of task that is selected to map a given brain region is influenced by a number of factors, including the purported function of that region, results of pre-operative non-invasive mapping (e.g., fMRI, MEG), and patient-specific factors (e.g., if the patient is bilingual or monolingual, Benjamin et al, 2017;Fernández-Coello et al, 2013a;Połczyńska, Benjamin, Japardi, Frew, & Bookheimer, 2016;Połczyńska, Japardi, & Bookheimer, 2017). Regardless of the task or region, however, both patient participation and the clinical team's ability to "read" the patient's behaviour in real time are critical.…”

Section: Introductionmentioning

confidence: 99%

Direct electrical stimulation mapping of cognitive functions in the human brain

Mahon

Miozzo

Pilcher

2019

Cognitive Neuropsychology

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Direct electrical stimulation (DES) is a well-established clinical tool for mapping cognitive functions while patients are undergoing awake neurosurgery or invasive long-term monitoring to identify epileptogenic tissue. Despite the proliferation of a range of invasive and noninvasive methods for mapping sensory, motor and cognitive processes in the human brain, DES remains the clinical gold standard for establishing the margins of brain tissue that can be safely removed while avoiding long-term neurological deficits. In parallel, and principally over the last two decades, DES has emerged as a powerful scientific tool for testing hypotheses of brain organization and mechanistic hypotheses of cognitive function. DES can cause transient "lesions" and thus can support causal inferences about the necessity of stimulated brain regions for specific functions, as well as the separability of sensory, motor and cognitive processes. This Special Issue of Cognitive Neuropsychology emphasizes the use of DES as a research tool to advance understanding of normal brain organization and function.

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Lateralizing language function with pre-operative functional magnetic resonance imaging in early proficient bilingual patients

Cited by 31 publications

References 74 publications

Does bilingualism increase brain or cognitive reserve in patients with temporal lobe epilepsy?

Does bilingualism increase brain or cognitive reserve in patients with temporal lobe epilepsy?

Evidence for shared conceptual representations for sign and speech

Direct electrical stimulation mapping of cognitive functions in the human brain

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