The Experts below are selected from a list of 8289 Experts worldwide ranked by ideXlab platform
Michael S Beauchamp - One of the best experts on this subject based on the ideXlab platform.
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Cerebral Cortex doi:10.1093/cercor/bhq010 Surface Area Accounts for the Relation of Gray Matter Volume to Reading-Related Skills and History of Dyslexia
2015Co-Authors: Richard E Frye, Jacqueline Liederman, Benjamin Malmberg, John Mclean, David Strickl, Michael S BeauchampAbstract:It is unknown whether the abnormalities in brain structure and function observed in dyslexic readers are congenital or arise later in development. Analyzing the 2 components of gray matter volume separately may help in differentiating these possibilities. Gray matter volume is the product of cortical surface area, determined during prenatal brain development, and cortical thickness, de-termined during postnatal development. For this study, 16 adults with a history of Phonological Dyslexia and 16 age- and gender-matched controls underwent magnetic resonance imaging and an extensive battery of tests of reading-related skills. Cortical surface area and gray matter volume measures of the whole brain, the inferior frontal gyrus, and the fusiform gyrus were similarly related to Phonological skills and a history of Dyslexia. There was no relationship between cortical thickness and Phonological skills or history of Dyslexia. Because cortical surface area reflects cortical folding patterns determined prenatally, this suggests that brain differences in Dyslexia are rooted in early cortical development and are not due to compensatory changes that occur during postnatal development and would be expected to influence cortical thickness. This study demonstrates the importance of examining the separate components of gray matter volume when studying developmental abnormalities
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surface area accounts for the relation of gray matter volume to reading related skills and history of Dyslexia
Cerebral Cortex, 2010Co-Authors: Richard E Frye, Jacqueline Liederman, Benjamin Malmberg, John Mclean, David Strickland, Michael S BeauchampAbstract:It is unknown whether the abnormalities in brain structure and function observed in dyslexic readers are congenital or arise later in development. Analyzing the 2 components of gray matter volume separately may help in differentiating these possibilities. Gray matter volume is the product of cortical surface area, determined during prenatal brain development, and cortical thickness, determined during postnatal development. For this study, 16 adults with a history of Phonological Dyslexia and 16 age- and gender-matched controls underwent magnetic resonance imaging and an extensive battery of tests of reading-related skills. Cortical surface area and gray matter volume measures of the whole brain, the inferior frontal gyrus, and the fusiform gyrus were similarly related to Phonological skills and a history of Dyslexia. There was no relationship between cortical thickness and Phonological skills or history of Dyslexia. Because cortical surface area reflects cortical folding patterns determined prenatally, this suggests that brain differences in Dyslexia are rooted in early cortical development and are not due to compensatory changes that occur during postnatal development and would be expected to influence cortical thickness. This study demonstrates the importance of examining the separate components of gray matter volume when studying developmental abnormalities.
Richard E Frye - One of the best experts on this subject based on the ideXlab platform.
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Cerebral Cortex doi:10.1093/cercor/bhq010 Surface Area Accounts for the Relation of Gray Matter Volume to Reading-Related Skills and History of Dyslexia
2015Co-Authors: Richard E Frye, Jacqueline Liederman, Benjamin Malmberg, John Mclean, David Strickl, Michael S BeauchampAbstract:It is unknown whether the abnormalities in brain structure and function observed in dyslexic readers are congenital or arise later in development. Analyzing the 2 components of gray matter volume separately may help in differentiating these possibilities. Gray matter volume is the product of cortical surface area, determined during prenatal brain development, and cortical thickness, de-termined during postnatal development. For this study, 16 adults with a history of Phonological Dyslexia and 16 age- and gender-matched controls underwent magnetic resonance imaging and an extensive battery of tests of reading-related skills. Cortical surface area and gray matter volume measures of the whole brain, the inferior frontal gyrus, and the fusiform gyrus were similarly related to Phonological skills and a history of Dyslexia. There was no relationship between cortical thickness and Phonological skills or history of Dyslexia. Because cortical surface area reflects cortical folding patterns determined prenatally, this suggests that brain differences in Dyslexia are rooted in early cortical development and are not due to compensatory changes that occur during postnatal development and would be expected to influence cortical thickness. This study demonstrates the importance of examining the separate components of gray matter volume when studying developmental abnormalities
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surface area accounts for the relation of gray matter volume to reading related skills and history of Dyslexia
Cerebral Cortex, 2010Co-Authors: Richard E Frye, Jacqueline Liederman, Benjamin Malmberg, John Mclean, David Strickland, Michael S BeauchampAbstract:It is unknown whether the abnormalities in brain structure and function observed in dyslexic readers are congenital or arise later in development. Analyzing the 2 components of gray matter volume separately may help in differentiating these possibilities. Gray matter volume is the product of cortical surface area, determined during prenatal brain development, and cortical thickness, determined during postnatal development. For this study, 16 adults with a history of Phonological Dyslexia and 16 age- and gender-matched controls underwent magnetic resonance imaging and an extensive battery of tests of reading-related skills. Cortical surface area and gray matter volume measures of the whole brain, the inferior frontal gyrus, and the fusiform gyrus were similarly related to Phonological skills and a history of Dyslexia. There was no relationship between cortical thickness and Phonological skills or history of Dyslexia. Because cortical surface area reflects cortical folding patterns determined prenatally, this suggests that brain differences in Dyslexia are rooted in early cortical development and are not due to compensatory changes that occur during postnatal development and would be expected to influence cortical thickness. This study demonstrates the importance of examining the separate components of gray matter volume when studying developmental abnormalities.
Richard J Hanley - One of the best experts on this subject based on the ideXlab platform.
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surface and Phonological developmental Dyslexia in greek
Cognitive Neuropsychology, 2009Co-Authors: Sotirios D Douklias, Jackie Masterson, Richard J HanleyAbstract:The present study examined whether equivalents of surface and Phonological subtypes of developmental Dyslexia could be found among a sample of 84 poor readers aged 9–12 years in Greece. Word reading latency was used as a measure of lexical skill, and nonword reading accuracy was used as a measure of nonlexical skill. A simple regression of word reading latencies on nonword reading accuracy scores was performed for 42 developing readers. A total of 2 poor readers with accurate nonword reading plus slow word reading relative to controls (equivalents of surface Dyslexia) and 2 poor readers with inaccurate nonword reading plus fast accurate word reading relative to controls (equivalents of Phonological Dyslexia) were identified from amongst the sample of poor readers. Further testing of these 4 cases on measures of irregular-word and nonword spelling revealed additional evidence of a dissociation between lexical and nonlexical impairments. These results support the notion that dual-route models can be used to...
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a dissociation between developmental surface and Phonological Dyslexia in two undergraduate students
Neuropsychologia, 1995Co-Authors: Richard J Hanley, Frances GardAbstract:This study compares the nature of the reading deficit that was observed in two dyslexic undergraduate students who were severely impaired at reading and spelling compared with normal undergraduates. They both achieved the same (below average) score on the National Adult Reading Test and on the Schonell spelling test. One of them, however, was good at reading and spelling nonwords, had good Phonological awareness skills, was better at reading regular than irregular words, and made Phonologically accurate reading and spelling errors (i.e. was a surface dyslexic). The other had poor Phonological awareness, produced relatively few Phonologically accurate spelling errors, and was poor at reading and spelling nonwords (i.e. was a Phonological dyslexic). It is particularly noteworthy that such a clear dissociation between surface and Phonological forms of developmental Dyslexia occurred in two subjects who were closely matched in terms of their overall reading and spelling ability, and also in terms of their memory span and vocabulary. It is argued that this study strengthens the evidence for the existence of qualitatively different types of developmental Dyslexia. The findings are also consistent with the view that Phonological awareness skills are more closely related to the operation of the Phonological rather than the visual reading route.
John Mclean - One of the best experts on this subject based on the ideXlab platform.
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Cerebral Cortex doi:10.1093/cercor/bhq010 Surface Area Accounts for the Relation of Gray Matter Volume to Reading-Related Skills and History of Dyslexia
2015Co-Authors: Richard E Frye, Jacqueline Liederman, Benjamin Malmberg, John Mclean, David Strickl, Michael S BeauchampAbstract:It is unknown whether the abnormalities in brain structure and function observed in dyslexic readers are congenital or arise later in development. Analyzing the 2 components of gray matter volume separately may help in differentiating these possibilities. Gray matter volume is the product of cortical surface area, determined during prenatal brain development, and cortical thickness, de-termined during postnatal development. For this study, 16 adults with a history of Phonological Dyslexia and 16 age- and gender-matched controls underwent magnetic resonance imaging and an extensive battery of tests of reading-related skills. Cortical surface area and gray matter volume measures of the whole brain, the inferior frontal gyrus, and the fusiform gyrus were similarly related to Phonological skills and a history of Dyslexia. There was no relationship between cortical thickness and Phonological skills or history of Dyslexia. Because cortical surface area reflects cortical folding patterns determined prenatally, this suggests that brain differences in Dyslexia are rooted in early cortical development and are not due to compensatory changes that occur during postnatal development and would be expected to influence cortical thickness. This study demonstrates the importance of examining the separate components of gray matter volume when studying developmental abnormalities
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surface area accounts for the relation of gray matter volume to reading related skills and history of Dyslexia
Cerebral Cortex, 2010Co-Authors: Richard E Frye, Jacqueline Liederman, Benjamin Malmberg, John Mclean, David Strickland, Michael S BeauchampAbstract:It is unknown whether the abnormalities in brain structure and function observed in dyslexic readers are congenital or arise later in development. Analyzing the 2 components of gray matter volume separately may help in differentiating these possibilities. Gray matter volume is the product of cortical surface area, determined during prenatal brain development, and cortical thickness, determined during postnatal development. For this study, 16 adults with a history of Phonological Dyslexia and 16 age- and gender-matched controls underwent magnetic resonance imaging and an extensive battery of tests of reading-related skills. Cortical surface area and gray matter volume measures of the whole brain, the inferior frontal gyrus, and the fusiform gyrus were similarly related to Phonological skills and a history of Dyslexia. There was no relationship between cortical thickness and Phonological skills or history of Dyslexia. Because cortical surface area reflects cortical folding patterns determined prenatally, this suggests that brain differences in Dyslexia are rooted in early cortical development and are not due to compensatory changes that occur during postnatal development and would be expected to influence cortical thickness. This study demonstrates the importance of examining the separate components of gray matter volume when studying developmental abnormalities.
Benjamin Malmberg - One of the best experts on this subject based on the ideXlab platform.
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Cerebral Cortex doi:10.1093/cercor/bhq010 Surface Area Accounts for the Relation of Gray Matter Volume to Reading-Related Skills and History of Dyslexia
2015Co-Authors: Richard E Frye, Jacqueline Liederman, Benjamin Malmberg, John Mclean, David Strickl, Michael S BeauchampAbstract:It is unknown whether the abnormalities in brain structure and function observed in dyslexic readers are congenital or arise later in development. Analyzing the 2 components of gray matter volume separately may help in differentiating these possibilities. Gray matter volume is the product of cortical surface area, determined during prenatal brain development, and cortical thickness, de-termined during postnatal development. For this study, 16 adults with a history of Phonological Dyslexia and 16 age- and gender-matched controls underwent magnetic resonance imaging and an extensive battery of tests of reading-related skills. Cortical surface area and gray matter volume measures of the whole brain, the inferior frontal gyrus, and the fusiform gyrus were similarly related to Phonological skills and a history of Dyslexia. There was no relationship between cortical thickness and Phonological skills or history of Dyslexia. Because cortical surface area reflects cortical folding patterns determined prenatally, this suggests that brain differences in Dyslexia are rooted in early cortical development and are not due to compensatory changes that occur during postnatal development and would be expected to influence cortical thickness. This study demonstrates the importance of examining the separate components of gray matter volume when studying developmental abnormalities
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surface area accounts for the relation of gray matter volume to reading related skills and history of Dyslexia
Cerebral Cortex, 2010Co-Authors: Richard E Frye, Jacqueline Liederman, Benjamin Malmberg, John Mclean, David Strickland, Michael S BeauchampAbstract:It is unknown whether the abnormalities in brain structure and function observed in dyslexic readers are congenital or arise later in development. Analyzing the 2 components of gray matter volume separately may help in differentiating these possibilities. Gray matter volume is the product of cortical surface area, determined during prenatal brain development, and cortical thickness, determined during postnatal development. For this study, 16 adults with a history of Phonological Dyslexia and 16 age- and gender-matched controls underwent magnetic resonance imaging and an extensive battery of tests of reading-related skills. Cortical surface area and gray matter volume measures of the whole brain, the inferior frontal gyrus, and the fusiform gyrus were similarly related to Phonological skills and a history of Dyslexia. There was no relationship between cortical thickness and Phonological skills or history of Dyslexia. Because cortical surface area reflects cortical folding patterns determined prenatally, this suggests that brain differences in Dyslexia are rooted in early cortical development and are not due to compensatory changes that occur during postnatal development and would be expected to influence cortical thickness. This study demonstrates the importance of examining the separate components of gray matter volume when studying developmental abnormalities.