Exploratory study of dorsal visual stream dysfunction in autism; A case series

Hay, I.; Dutton, Gordon N.; Biggar, Susan; Ibrahim, Hassan; Assheton, D

doi:10.1016/j.rasd.2019.101456

Cited by 6 publications

(2 citation statements)

References 89 publications

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“…Diagnostic confusion with dyscalculia Spatial organization and coordination disorder Spatial neglect Dorsal stream dysfunction Balint Syndrome of learning that the child comes to use tactile and vestibular information (Guzzetta et al, 2001a). Consequently, a CVI may alter an individual's psychomotor skills in the form of optic ataxia (Hay et al, 2020) and can easily be confused with a practical disorder or dyspraxia (Chokron and Dutton, 2016). At the same time, just as unilateral spatial neglect has been associated with motor difficulties such as akinesia or hypokinesia in adults, current evidence suggests that CVI in children, and in particular unilateral spatial neglect, are most often associated with motor neglect as well as with praxis disorders (Gaudry et al, 2010;Chokron and Dutton, 2016).…”

Section: Spatial Orientation and Spatial Representation Deficits Place Recognition Deficitmentioning

confidence: 99%

Cortical Visual Impairments and Learning Disabilities

Chokron

Kovarski

Dutton

2021

Front. Hum. Neurosci.

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Medical advances in neonatology have improved the survival rate of premature infants, as well as children who are born under difficult neurological conditions. As a result, the prevalence of cerebral dysfunctions, whether minimal or more severe, is increasing in all industrialized countries and in some developing nations. Whereas in the past, ophthalmological diseases were considered principally responsible for severe visual impairment, today, all recent epidemiological studies show that the primary cause of blindness and severe visual impairment in children in industrialized countries is now neurological, with lesions acquired around the time of birth currently comprising the commonest contributor. The resulting cortical or cerebral visual impairments (CVIs) have long been ignored, or have been confused either with other ophthalmological disorders causing low vision, or with a range of learning disabilities. We present here the deleterious consequences that CVI can have upon learning and social interaction, and how these can be given behavioral labels without the underlying visual causes being considered. We discuss the need to train and inform clinicians in the identification and diagnosis of CVI, and how to distinguish the diagnosis of CVI from amongst other visual disorders, including the specific learning disorders. This is important because the range of approaches needed to enhance the development of children with CVI is specific to each child’s unique visual needs, making incorrect labeling or diagnosis potentially detrimental to affected children because these needs are not met.

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Section: Spatial Orientation and Spatial Representation Deficits Place Recognition Deficitmentioning

confidence: 99%

Cortical Visual Impairments and Learning Disabilities

Chokron

Kovarski

Dutton

2021

Front. Hum. Neurosci.

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“…Functional imbalance between ventral and dorsal streams may also account for visuospatial difficulties in ASD [ 110 , 111 ]. Indeed, some studies have identified similar activations within the ventral stream in ASD as in TD while being diminished within the dorsal stream [ 52 – 54 ], which corroborates the neuroimaging account of a specific dysfunction of the dorsal stream in visual perception in ASD [ 112 ].…”

Section: Discussionmentioning

confidence: 99%

Brain correlates of declarative memory atypicalities in autism: a systematic review of functional neuroimaging findings

Desaunay

Guillery

Moussaoui³

et al. 2023

Molecular Autism

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The long-described atypicalities of memory functioning experienced by people with autism have major implications for daily living, academic learning, as well as cognitive remediation. Though behavioral studies have identified a robust profile of memory strengths and weaknesses in autism spectrum disorder (ASD), few works have attempted to establish a synthesis concerning their neural bases. In this systematic review of functional neuroimaging studies, we highlight functional brain asymmetries in three anatomical planes during memory processing between individuals with ASD and typical development. These asymmetries consist of greater activity of the left hemisphere than the right in ASD participants, of posterior brain regions—including hippocampus—rather than anterior ones, and presumably of the ventral (occipito-temporal) streams rather than the dorsal (occipito-parietal) ones. These functional alterations may be linked to atypical memory processes in ASD, including the pre-eminence of verbal over spatial information, impaired active maintenance in working memory, and preserved relational memory despite poor context processing in episodic memory.

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From vision to cognition: potential contributions of cerebral visual impairment to neurodevelopmental disorders

Chokron

Dutton

2022

J Neural Transm

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Exploratory study of dorsal visual stream dysfunction in autism; A case series

Cited by 6 publications

References 89 publications

Cortical Visual Impairments and Learning Disabilities

Cortical Visual Impairments and Learning Disabilities

Brain correlates of declarative memory atypicalities in autism: a systematic review of functional neuroimaging findings

From vision to cognition: potential contributions of cerebral visual impairment to neurodevelopmental disorders

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