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Title: Left-handed musicians show a higher probability of atypical cerebral dominance for language
Author: Villar-Rodríguez, Esteban
Palomar-García, María Ángeles
Hernández Pardo, Mireia
Adrián-Ventura, Jesús
Olcina-Sempere, Gustau
Parcet, Maria Antònia
Ávila, César
Keywords: Dominància cerebral
Lateralitat manual
Gramàtica cognitiva
Cerebral dominance
Left- and right-handedness
Cognitive grammar
Issue Date: 2020
Publisher: Wiley
Abstract: Music processing and right hemispheric language lateralization share a common network in the right auditory cortex and its frontal connections. Given that the development of hemispheric language dominance takes place over several years, this study tested whether musicianship could increase the probability of observing right language dominance in left-handers. Using a classic fMRI language paradigm, results showed that atypical lateralization was more predominant in musicians (40%) than in nonmusicians (5%). Comparison of left-handers with typical left and atypical right lateralization revealed that: (a) atypical cases presented a thicker right pars triangularis and more gyrified left Heschl's gyrus; and (b) the right pars triangularis of atypical cases showed a stronger intra-hemispheric functional connectivity with the right angular gyrus, but a weaker interhemispheric functional connectivity with part of the left Broca's area. Thus, musicianship is the first known factor related to a higher prevalence of atypical language dominance in healthy left-handed individuals. We suggest that differences in the frontal and temporal cortex might act as shared predisposing factors to both musicianship and atypical language lateralization.
Note: Reproducció del document publicat a:
It is part of: Human Brain Mapping, 2020, vol. 41, num. 8, p. 2048 -2058
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ISSN: 1065-9471
Appears in Collections:Articles publicats en revistes (Cognició, Desenvolupament i Psicologia de l'Educació)

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