A Functional Magnetic Resonance Imaging Study of Left Hemisphere Language Dominance in Children

Balsamo, Lyn; Xu, Benjamin; Grandin, Cécile; Petrella, Jeffrey R.; Braniecki, Suzanne; Elliott, Teresa; Gaillard, William D.

doi:10.1001/archneur.59.7.1168

Cited by 98 publications

(57 citation statements)

References 51 publications

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“…In the youngest readers, activity in the left posterior superior temporal sulcus was associated with the maturation of their phonological processing abilities, results that extend previous evidence that posterior language areas mature earlier than anterior ones (Balsamo et al, 2002;Simos et al, 2001). The developmental decrease in the right ventral stream activity indicates a decreasing reliance on nonlexical form recognition systems for word identification, and provides strong support for Orton's theory (1937) that learning to read requires children to disengage posterior right hemisphere visual representations that interfere with proper word identification.…”

Section: Plasticity Induced By Specific Training and Activitiessupporting

confidence: 84%

Cultural and linguistic influence on brain organization for language and possible consequences for dyslexia: A review

Johansson

2006

Ann. of Dyslexia

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Current neuroimaging and neurophysiologic techniques have substantially increased our possibilities to study processes related to various language functions in the intact human brain. Learning to read and write influences the functional organization of the brain. What is uni-13 individual studies mentioned in this review, the readers are referred to the individual papers quoted. However, some short presentations and explanations to abbreviations used are given here. With positron emission tomography (PET) and functional magnetic resonance (fMRI), fluctuations in brain activity can be studied with a resolution from minutes (PET) to seconds (fMRI). Neuronal activity gives rise to very weak magnetic fields, which after shielding of the much stronger magnetic fields of the earth, can be registered at more than 300 points on the scalp simultaneously with a millisecond resolution with magnetoencephalography (MEG), an online technique showing where and when an activation starts and how it spreads to other regions. Similarly, small voltage fluctuations during neuronal activity-event related potentials (ERPs)-can be registered by multiple electrodes on the skull, a method that can be used even in infants. Voxel-based morphometry is a method that greatly has improved our abilities to study the anatomy of the living brain. Transcranial magnetic stimulation (TMS) is a neurophysiological technique that can temporarily excite or inhibit synaptic efficiency in specific areas and transiently alter brain function. For references to these methods, see Johansson (2006).

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Section: Plasticity Induced By Specific Training and Activitiessupporting

confidence: 84%

Cultural and linguistic influence on brain organization for language and possible consequences for dyslexia: A review

Johansson

2006

Ann. of Dyslexia

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“…Recent evidence has suggested that, in children as in adults, cortical activity during semantic processing tends to be left lateralized (Balsamo et al, 2002;Balsamo, Xu & Gaillard, 2006;Binder, Desai, Graves & Conant, 2009;Binder et al, 1997). Though evidence shows that language networks for semantic processing are less specialized in children (Brauer & Frederici, 2007), one region that has been implicated in semantic processing both in children and adults is the fusiform gyrus, in the ventral temporal lobe.…”

Section: Fusiform Gyrus and Visual-perceptual Feature Processingmentioning

confidence: 99%

A lifespan perspective on semantic processing of concrete concepts: does a sensory/motor model have the potential to bridge the gap?

Antonucci

Alt

2011

Cogn Affect Behav Neurosci

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“…Functional magnetic resonance imaging (fMRI) studies have demonstrated that left hemisphere dominance of language function may already be present in infants Ͻ1 year old (Dehaene-Lambertz et al, 2002;Peña et al, 2003). In older children (Ͼ5 years old), not only left-lateralized responses during language-related tasks (Balsamo et al, 2002;Ahmad et al, 2003), but also correlations between brain functional lateralization and language performance (Everts et al, 2009) have been reported. Previous fMRI studies, however, did not concentrate on the link between language performance and brain functional lateralization in healthy preschool children aged 1-4 years old, because this is a challenging age for brain imaging methods such as fMRI.…”

Section: Introductionmentioning

confidence: 99%

Lateralized Theta Wave Connectivity and Language Performance in 2- to 5-Year-Old Children

Kikuchi¹,

Shitamichi²,

Yoshimura³

et al. 2011

J. Neurosci.

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Recent neuroimaging studies support the view that a left-lateralized brain network is crucial for language development in children. However, no previous studies have demonstrated a clear link between lateralized brain functional network and language performance in preschool children. Magnetoencephalography (MEG) is a noninvasive brain imaging technique and is a practical neuroimaging method for use in young children. MEG produces a reference-free signal, and is therefore an ideal tool to compute coherence between two distant cortical rhythms. In the present study, using a custom child-sized MEG system, we investigated brain networks while 78 right-handed preschool human children (32-64 months; 96% were 3-4 years old) listened to stories with moving images. The results indicated that left dominance of parietotemporal coherence in theta band activity (6-8 Hz) was specifically correlated with higher performance of languagerelated tasks, whereas this laterality was not correlated with nonverbal cognitive performance, chronological age, or head circumference. Power analyses did not reveal any specific frequencies that contributed to higher language performance. Our results suggest that it is not the left dominance in theta oscillation per se, but the left-dominant phase-locked connectivity via theta oscillation that contributes to the development of language ability in young children.

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A Functional Magnetic Resonance Imaging Study of Left Hemisphere Language Dominance in Children

Abstract: Hemispheric lateralization was clearly demonstrated in 8 children. As in adults, left hemisphere lateralization of receptive language is present at age 8 years.

Cited by 98 publications

References 51 publications

Cultural and linguistic influence on brain organization for language and possible consequences for dyslexia: A review

Cultural and linguistic influence on brain organization for language and possible consequences for dyslexia: A review

A lifespan perspective on semantic processing of concrete concepts: does a sensory/motor model have the potential to bridge the gap?

Lateralized Theta Wave Connectivity and Language Performance in 2- to 5-Year-Old Children

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