The timing and strength of regional brain activation associated with word recognition in children with reading difficulties
The study investigates the relative degree and timing of cortical activation across parietal, temporal, and frontal regions during performance of a continuous visual word recognition task in children who experience reading difficulties (N=44, RD) and typical readers (N=40, NI). Minimum norm estimate...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2011-05-01
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| Series: | Frontiers in Human Neuroscience |
| Subjects: | |
| Online Access: | http://journal.frontiersin.org/Journal/10.3389/fnhum.2011.00045/full |
| _version_ | 1818494231942004736 |
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| author | Roozbeh eRezaie Panagiotis G Simos Jack M Fletcher Jenifer eJuranek Paul T Cirino Zhimin eLi Antony D Passaro Andrew C Papanicolaou |
| author_facet | Roozbeh eRezaie Panagiotis G Simos Jack M Fletcher Jenifer eJuranek Paul T Cirino Zhimin eLi Antony D Passaro Andrew C Papanicolaou |
| author_sort | Roozbeh eRezaie |
| collection | DOAJ |
| description | The study investigates the relative degree and timing of cortical activation across parietal, temporal, and frontal regions during performance of a continuous visual word recognition task in children who experience reading difficulties (N=44, RD) and typical readers (N=40, NI). Minimum norm estimates of regional neurophysiological activity were obtained from magnetoencephalographic recordings. Children with RD showed bilaterally reduced neurophysiological activity in the superior and middle temporal gyri, and increased activity in rostral middle frontal and ventral occipitotemporal cortices, bilaterally. The temporal profile of activity in the RD group, featured near-simultaneous activity peaks in temporal, inferior parietal and prefrontal regions, in contrast to a clear temporal progression of activity among these areas in the NI group. These results replicate and extend previous MEG and fMRI results demonstrating atypical, latency-dependent attributes of the brain circuit involved in word reading in children with reading difficulties. |
| first_indexed | 2024-12-10T18:03:52Z |
| format | Article |
| id | doaj.art-2c4af341cb4b46498ce87934c23cf5ff |
| institution | Directory Open Access Journal |
| issn | 1662-5161 |
| language | English |
| last_indexed | 2024-12-10T18:03:52Z |
| publishDate | 2011-05-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Human Neuroscience |
| spelling | doaj.art-2c4af341cb4b46498ce87934c23cf5ff2022-12-22T01:38:40ZengFrontiers Media S.A.Frontiers in Human Neuroscience1662-51612011-05-01510.3389/fnhum.2011.000459812The timing and strength of regional brain activation associated with word recognition in children with reading difficultiesRoozbeh eRezaie0Panagiotis G Simos1Jack M Fletcher2Jenifer eJuranek3Paul T Cirino4Zhimin eLi5Antony D Passaro6Andrew C Papanicolaou7University of Texas Medical School-HoustonUniversity of CreteUniversity of HoustonUniversity of Texas Medical School-HoustonUniversity of HoustonUniversity of Texas Medical School-HoustonUniversity of Texas Medical School-HoustonUniversity of Texas Medical School-HoustonThe study investigates the relative degree and timing of cortical activation across parietal, temporal, and frontal regions during performance of a continuous visual word recognition task in children who experience reading difficulties (N=44, RD) and typical readers (N=40, NI). Minimum norm estimates of regional neurophysiological activity were obtained from magnetoencephalographic recordings. Children with RD showed bilaterally reduced neurophysiological activity in the superior and middle temporal gyri, and increased activity in rostral middle frontal and ventral occipitotemporal cortices, bilaterally. The temporal profile of activity in the RD group, featured near-simultaneous activity peaks in temporal, inferior parietal and prefrontal regions, in contrast to a clear temporal progression of activity among these areas in the NI group. These results replicate and extend previous MEG and fMRI results demonstrating atypical, latency-dependent attributes of the brain circuit involved in word reading in children with reading difficulties.http://journal.frontiersin.org/Journal/10.3389/fnhum.2011.00045/fullDyslexiaMagnetoencephalographyreadingFunctional Brain imagingMiddle temporal gyrus |
| spellingShingle | Roozbeh eRezaie Panagiotis G Simos Jack M Fletcher Jenifer eJuranek Paul T Cirino Zhimin eLi Antony D Passaro Andrew C Papanicolaou The timing and strength of regional brain activation associated with word recognition in children with reading difficulties Frontiers in Human Neuroscience Dyslexia Magnetoencephalography reading Functional Brain imaging Middle temporal gyrus |
| title | The timing and strength of regional brain activation associated with word recognition in children with reading difficulties |
| title_full | The timing and strength of regional brain activation associated with word recognition in children with reading difficulties |
| title_fullStr | The timing and strength of regional brain activation associated with word recognition in children with reading difficulties |
| title_full_unstemmed | The timing and strength of regional brain activation associated with word recognition in children with reading difficulties |
| title_short | The timing and strength of regional brain activation associated with word recognition in children with reading difficulties |
| title_sort | timing and strength of regional brain activation associated with word recognition in children with reading difficulties |
| topic | Dyslexia Magnetoencephalography reading Functional Brain imaging Middle temporal gyrus |
| url | http://journal.frontiersin.org/Journal/10.3389/fnhum.2011.00045/full |
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