Right-hemispheric processing of non-linguistic word features: implications for mapping language recovery after stroke.

Human Brain Mapping
Annette BaumgaertnerHartwig Roman Siebner

Abstract

Verbal stimuli often induce right-hemispheric activation in patients with aphasia after left-hemispheric stroke. This right-hemispheric activation is commonly attributed to functional reorganization within the language system. Yet previous evidence suggests that functional activation in right-hemispheric homologues of classic left-hemispheric language areas may partly be due to processing nonlinguistic perceptual features of verbal stimuli. We used functional MRI (fMRI) to clarify the role of the right hemisphere in the perception of nonlinguistic word features in healthy individuals. Participants made perceptual, semantic, or phonological decisions on the same set of auditorily and visually presented word stimuli. Perceptual decisions required judgements about stimulus-inherent changes in font size (visual modality) or fundamental frequency contour (auditory modality). The semantic judgement required subjects to decide whether a stimulus is natural or man-made; the phonologic decision required a decision on whether a stimulus contains two or three syllables. Compared to phonologic or semantic decision, nonlinguistic perceptual decisions resulted in a stronger right-hemispheric activation. Specifically, the right inferior front...Continue Reading

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Citations

Sep 26, 2013·Proceedings of the National Academy of Sciences of the United States of America·Gesa HartwigsenHartwig R Siebner
Jun 30, 2014·Brain : a Journal of Neurology·Fatemeh GeranmayehRichard J S Wise
Mar 11, 2020·Cognitive Processing·Lílian Rodrigues de AlmeidaPeter C Hansen
Mar 18, 2020·ELife·Gesa HartwigsenDorothee Saur
May 21, 2020·Journal of Speech, Language, and Hearing Research : JSLHR·Ethan Weed, Riccardo Fusaroli
Jun 3, 2017·Neural Plasticity·Sladjana LukicCynthia K Thompson
Nov 13, 2018·Brain : a Journal of Neurology·Andrea Gajardo-VidalCathy J Price
Aug 24, 2020·NeuroImage·Maximilian A FriehsGesa Hartwigsen

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