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Kaul D, Papadatou-Pastou M, Learmonth G. A meta-analysis of the line bisection task in children. Laterality 2023; 28:48-71. [PMID: 36416485 DOI: 10.1080/1357650x.2022.2147941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Meta-analyses have shown subtle, group-level asymmetries of spatial attention in adults favouring the left hemispace (pseudoneglect). However, no meta-analysis has synthesized data on children. We performed a random-effects meta-analysis of spatial biases in children aged ≤16 years. Databases (PsycINFO, Web of Science & Scopus) and pre-print servers (bioRxiv, medRxiv & PsyArXiv) were searched for studies involving typically developing children with a mean age of ≤16, who were tested using line bisection. Thirty-three datasets, from 31 studies, involving 2101 children, were included. No bias was identified overall, but there was a small leftward bias in a subgroup where all children were aged ≤16. Moderator analysis found symmetrical neglect, with right-handed actions resulting in right-biased bisections, and left-handed actions in left-biased bisections. Bisections were more leftward in studies with a higher percentage of boys relative to girls. Mean age, hand preference, and control group status did not moderate biases, and there was no difference between children aged ≤7 and ≥7 years, although the number of studies in each moderator analysis was small. There was no evidence of small study bias. We conclude that pseudoneglect may be present in children but is dependent on individual characteristics (sex) and/or task demands (hand used).Registration: Open Science Framework (https://osf.io/n68fz/).
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Affiliation(s)
- Danishta Kaul
- School of Psychology & Neuroscience, University of Glasgow, Glasgow, Scotland
| | - Marietta Papadatou-Pastou
- School of Education, National and Kapodistrian University of Athens, Athens, Greece.,Biomedical Research Foundation, Academy of Athens, Athens, Greece
| | - Gemma Learmonth
- School of Psychology & Neuroscience, University of Glasgow, Glasgow, Scotland
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Caldani S, Baghdadi M, Peyre H, Khoury E, Delorme R, Bucci MP. Poor visuo-spatial orientation and path memorization in children with dyslexia. Nord J Psychiatry 2022; 76:195-201. [PMID: 34278919 DOI: 10.1080/08039488.2021.1943705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
PURPOSE Given the importance of spatial representation and navigation in the natural environment and the presence of sensory motor integration impairment in dyslexic children the aim of this study was to explore the capability in spatial orientation task in dyslexic children. MATERIALS AND METHODS We included forty children: 26 dyslexic children (mean age: 10.1 ± 0.3 years old) and 14 typically developing (TD) children (mean age: 10.1 ± 0.4 years old). Children have to walk on an unguided isosceles rectangle triangle of 3 meters that was marked on the ground of a room, during two visual conditions: eyes open and eyes closed. Their paths were recorded using the HTC Vive system (Base + Trackers) with a refresh rate of 90 Hz with accuracy < 0.05 mm. RESULTS Results underlined that both groups of children reported poor performance during eyes closed condition. Moreover, dyslexic children, reported poor spatial orientation capabilities in the most difficult conditions, that is during reproduction of hypotenuse and angle of 45 deg. CONCLUSIONS We suggested that visual information is important during walking; the poor body orientation observed in dyslexic children could be due to a deficient integration of the sensorial inputs (visual, vestibular and proprioceptive). Further studies testing vestibular/cerebellar rehabilitation could be useful for these kinds of children.HighlightsChildren with dyslexia showed poor spatial orientation capabilities compared to typically developing children, particularly when visual inputs are not available and in the most difficult conditions (like rotation of the body).Poor motor abilities reported by children with dyslexia could be due to cerebrocerebellar pathways impairments.
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Affiliation(s)
- Simona Caldani
- UMR 7114 MoDyCo, CNRS, Paris Nanterre University, Nanterre, France.,Pediatric Balance Evaluation Center (EFEE), ENT Department, AP-HP, Robert Debré Hospital, Paris, France.,Paris University, Paris, France
| | - Moetez Baghdadi
- UMR 7114 MoDyCo, CNRS, Paris Nanterre University, Nanterre, France
| | - Hugo Peyre
- Paris University, Paris, France.,Child and Adolescent Psychiatry Department, AP-HP, Robert Debré Hospital, Paris, France
| | - Elie Khoury
- Child and Adolescent Psychiatry Department, AP-HP, Robert Debré Hospital, Paris, France
| | - Richard Delorme
- Paris University, Paris, France.,Child and Adolescent Psychiatry Department, AP-HP, Robert Debré Hospital, Paris, France.,Human Genetics & Cognitive Function, Institut Pasteur, Paris, France
| | - Maria Pia Bucci
- UMR 7114 MoDyCo, CNRS, Paris Nanterre University, Nanterre, France.,Pediatric Balance Evaluation Center (EFEE), ENT Department, AP-HP, Robert Debré Hospital, Paris, France.,Paris University, Paris, France
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Mather D. Preventing the Development of Dyslexia: A Premature Writing Hypothesis. Percept Mot Skills 2022; 129:468-487. [PMID: 35084244 PMCID: PMC9198397 DOI: 10.1177/00315125221075001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
It has been argued that dyslexia may develop in strongly left eye dominant children through learning to write using ipsilateral, right hemisphere motor pathways. New light on this theory has been cast by recent findings of atypical enhanced corpus callosum white matter in children with dyslexia, reflecting right to left hemisphere communication that is resistant to intensive remedial reading intervention. Enhanced corpus callosum white matter is consistent with uninhibited right to left hemisphere ipsilateral mirror-motor innervation, manifested as frequent mirror-letter writing errors in children with dyslexia. Delaying writing instruction until 7-8 years of age may prevent these errors and as well as the development of dyslexia. During the 7-8 year age period, visual-proprioceptive integration enables a child to mentally map whole word visual images onto kinaesthetic/proprioceptive letter engrams (memory representations). Hypothetically, this process is facilitated by anterior commissure activity involving inter-hemispheric transfer of ipsilateral mirror-to-non mirror motor movement. This postulate, involving delayed writing instruction pending further maturation, also receives indirect support from the remarkable proficiency leap among second graders reading Hebrew as Hebrew involves a leftward orthography in which ipsilateral right to left hemisphere innervation is uninhibited. Additionally, and more directly, normal reading comprehension for learning English among children with agenesis of the corpus callosum suggests that letter-sound decoding is not the sole route to proficient reading comprehension. In this paper, I make recommendations for obtaining empirical evidence of premature writing as a cause of dyslexia.
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Affiliation(s)
- David Mather
- Curriculum and Instruction8205University of Victoria
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Quercia P, Pozzo T, Marino A, Guillemant AL, Cappe C, Gueugneau N. Children with Dyslexia Have Altered Cross-Modal Processing Linked to Binocular Fusion. A Pilot Study. Clin Ophthalmol 2020; 14:437-448. [PMID: 32103890 PMCID: PMC7025670 DOI: 10.2147/opth.s226690] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Accepted: 01/27/2020] [Indexed: 01/16/2023] Open
Abstract
Introduction The cause of dyslexia, a reading disability characterized by difficulties with accurate and/or fluent word recognition and by poor spelling and decoding abilities, is unknown. A considerable body of evidence shows that dyslexics have phonological disorders. Other studies support a theory of altered cross-modal processing with the existence of a pan-sensory temporal processing deficit associated with dyslexia. Learning to read ultimately relies on the formation of automatic multisensory representations of sounds and their written representation while eyes fix a word or move along a text. We therefore studied the effect of brief sounds on vision with a modification of binocular fusion at the same time (using the Maddox Rod test). Methods To check if the effect of sound on vision is specific, we first tested with sounds and then replaced them with proprioceptive stimulation on 8 muscular sites. We tested two groups of children composed respectively of 14 dyslexic children and 10 controls. Results The results show transient visual scotoma (VS) produced by sensory stimulations associated with the manipulation of oculomotor balance, the effect being drastically higher in the dyslexic group. The spatial distribution of the VS is stochastic. The effect is not specific for sounds but exists also with proprioceptive stimulations. Discussion Although there was a very significant difference between the two groups, we were not able to correlate the (VS) occurrence with the dyslexic’s reading performance. One possibility to confirm the link between VS and reading impairment would be to find a specific treatment reducing the occurrence of the VS and to check its effect on dyslexia.
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Affiliation(s)
- Patrick Quercia
- Université de Bourgogne, Dijon, Campus Universitaire, UFR STAPS, BP 27877, F-21078 Dijon, France; INSERM U1093, Cognition, Action et Plasticité Sensorimotrice, Dijon F-21078, France
| | - Thierry Pozzo
- Center for Translational Neurophysiology, Istituto Italiano di Tecnologia, Ferrara, Italy
| | | | - Anne Laure Guillemant
- Université de Bourgogne, Dijon, Campus Universitaire, UFR STAPS, BP 27877, F-21078 Dijon, France; INSERM U1093, Cognition, Action et Plasticité Sensorimotrice, Dijon F-21078, France
| | - Céline Cappe
- Brain and Cognition Research Center, CerCo, CNRS UMR 5549, Toulouse, France
| | - Nicolas Gueugneau
- Université de Bourgogne, Dijon, Campus Universitaire, UFR STAPS, BP 27877, F-21078 Dijon, France; INSERM U1093, Cognition, Action et Plasticité Sensorimotrice, Dijon F-21078, France
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Goulème N, Delorme R, Villeneuve P, Gérard CL, Peyre H, Bucci MP. Impact of Somatosensory Input Deficiency on Subjective Visual Vertical Perception in Children With Reading Disorders. Front Neurol 2019; 10:1044. [PMID: 31632338 PMCID: PMC6779773 DOI: 10.3389/fneur.2019.01044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 09/16/2019] [Indexed: 11/13/2022] Open
Abstract
Purpose: Preliminary evidence indicated that children with a reading disorder (RD) may have deviance in their ability to perform high demanding cognitive tasks, such as reading, depending on somatosensory inputs. Until now, only anecdotical reports suggested that improving somatosensory inputs may influence their ability to maintain a stable perception of the visual world despite continuous movements of our eyes, head, and body. Here, we investigated whether changes in upright perception, the subjective visual vertical (SVV), were modulated by somatosensory inputs in a group of children with RD. Method: The SVV task was used under two distinct conditions, i.e., with or without somatosensory inputs from the foot. We enrolled a group of 20 children with reading disorders and 20 sex-, age-, IQ- matched children with neurotypical development. Results: Responses to the SVV task were found to be significantly less accurate in children with RD than in children with neurotypical development (p < 0.001). In the latter, SVV response did not depend on somatosensory inputs from the foot. In contrast, in children with RD somatosensory inputs, either improved or worsen their SVV depending on the tilt direction (p < 0.01). Conclusion: Our results suggested that SVV responses in children with RD could be related to an immaturity for heteromodal sensory integration, including somatosensory inputs.
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Affiliation(s)
- Nathalie Goulème
- UMR 1141 NeuroDiderot Inserm - Université de Paris, Robert Debré Hospital, Paris, France.,Posture Lab, Paris, France
| | - Richard Delorme
- Child and Adolescent Psychiatry Department, Robert Debré Hospital, Paris, France.,Human Genetics & Cognitive Function, Institut Pasteur, Paris, France.,Université de Paris, Paris, France
| | | | | | - Hugo Peyre
- UMR 1141 NeuroDiderot Inserm - Université de Paris, Robert Debré Hospital, Paris, France.,Child and Adolescent Psychiatry Department, Robert Debré Hospital, Paris, France.,Université de Paris, Paris, France
| | - Maria Pia Bucci
- UMR 1141 NeuroDiderot Inserm - Université de Paris, Robert Debré Hospital, Paris, France
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Van der Lubbe RH, de Kleine E, Rataj K. Dyslexic individuals orient but do not sustain visual attention: Electrophysiological support from the lower and upper alpha bands. Neuropsychologia 2019; 125:30-41. [DOI: 10.1016/j.neuropsychologia.2019.01.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 01/11/2019] [Accepted: 01/23/2019] [Indexed: 11/25/2022]
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Michel C, Quercia P, Joubert L. Representational Bias in the Radial Axis in Children With Dyslexia: A Landmarks Alignment Study. JOURNAL OF LEARNING DISABILITIES 2018; 52:158-167. [PMID: 29938599 DOI: 10.1177/0022219418784281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
To better identify the distinctive characteristics of space representation in the radial dimension, we have proposed a new paradigm: the landmarks alignment task where two parallel aluminum bars were radially presented. Children had to move a landmark along one bar and place it at the same location as the reference landmark placed by the examiner on the parallel bar. The major interest of this task was its capacity to assess space representation in the radial dimension when considering a spatial landmark that oriented the subject's attention toward the orthogonal dimension. The most important result showed that in the radial dimension children with dyslexia exhibited a forward bias on the left bar, meaning a mental underrepresentation of the leftward peripersonal space and/or a mental overrepresentation of the rightward peripersonal space. Furthermore, reading discrepancies were correlated with radial forward bias on the left bar. The experiment was also conducted in the lateral axis, showing a pseudoneglect behavior in children without dyslexia. Our landmarks alignment task had the advantage of being able to assess space representation in a complex environment. The forward radial representational bias in children with dyslexia could have implications for spatial orientation in peripersonal workspace in school situations.
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Affiliation(s)
| | | | - Lise Joubert
- Université Bourgogne Franche-Comté, Dijon. France
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Bucci MP, Goulème N, Stordeur C, Acquaviva E, Scheid I, Lefebvre A, Gerard C, Peyre H, Delorme R. Discriminant validity of spatial and temporal postural index in children with neurodevelopmental disorders. Int J Dev Neurosci 2017; 61:51-57. [DOI: 10.1016/j.ijdevneu.2017.06.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Revised: 06/30/2017] [Accepted: 06/30/2017] [Indexed: 11/28/2022] Open
Affiliation(s)
- Maria Pia Bucci
- UMR 1141 Inserm – Paris Diderot University, Robert Debré HospitalParisFrance
| | - Nathalie Goulème
- UMR 1141 Inserm – Paris Diderot University, Robert Debré HospitalParisFrance
- Lyon Neuroscience Research Center (Inserm U1028 CNRS UMR5292), LyonFrance & Department of Audiology and Otoneurological EvaluationCivil Hospitals of LyonLyonFrance
| | - Coline Stordeur
- Child and Adolescent Psychiatry DepartmentRobert Debré HospitalParisFrance
| | - Eric Acquaviva
- Child and Adolescent Psychiatry DepartmentRobert Debré HospitalParisFrance
| | - Isabelle Scheid
- Child and Adolescent Psychiatry DepartmentRobert Debré HospitalParisFrance
- High Functioning Autism Expert Centre, Fondamental FoundationParisFrance
| | - Aline Lefebvre
- Child and Adolescent Psychiatry DepartmentRobert Debré HospitalParisFrance
| | | | - Hugo Peyre
- Child and Adolescent Psychiatry DepartmentRobert Debré HospitalParisFrance
- Paris Diderot UniversityParis 7France
- High Functioning Autism Expert Centre, Fondamental FoundationParisFrance
| | - Richard Delorme
- Child and Adolescent Psychiatry DepartmentRobert Debré HospitalParisFrance
- Paris Diderot UniversityParis 7France
- High Functioning Autism Expert Centre, Fondamental FoundationParisFrance
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A critical review and meta-analysis of the perceptual pseudoneglect across psychiatric disorders: Is there a continuum? Cogn Process 2014; 16:17-25. [DOI: 10.1007/s10339-014-0640-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Accepted: 10/27/2014] [Indexed: 12/11/2022]
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