Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Parallel Processing01:20

Parallel Processing

941
The brain processes sensory information rapidly due to parallel processing, which involves sending data across multiple neural pathways at the same time. This method allows the brain to manage various sensory qualities, such as shapes, colors, movements, and locations, all concurrently. For instance, when observing a forest landscape, the brain simultaneously processes the movement of leaves, the shapes of trees, the depth between them, and the various shades of green. This enables a quick and...
941
Visual System01:26

Visual System

2.3K
Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
2.3K
Visual Agnosia01:12

Visual Agnosia

2.0K
Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round...
2.0K
Vision01:24

Vision

48.5K
Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
48.5K
Association Areas of the Cortex01:21

Association Areas of the Cortex

10.1K
Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
10.1K
Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

8.0K
The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex....
8.0K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Context and prior phonological knowledge as a support for novel word learning: A computational study with the BRAID-Acq model.

Psychonomic bulletin & review·2026
Same author

Peripheral scene context modulates task-driven saccades toward peripheral objects.

Vision research·2026
Same author

Perceptual Learning as a Rehabilitation Approach to Enhance Motion Processing in Maculopathy Patients.

Investigative ophthalmology & visual science·2026
Same author

Enhancing peripheral scene recognition through spatial frequency training: Behavioral evidence from macular degeneration and healthy aging.

Neuropsychologia·2026
Same author

The influence of visual attention on letter recognition and reading acquisition in Arabic.

Frontiers in psychology·2025
Same author

Neurobehavioral Changes in Macular Degeneration: Spatial Frequency Use in Scene Recognition.

Investigative ophthalmology & visual science·2025

Related Experiment Video

Updated: Apr 26, 2026

Author Spotlight: Exploring the Link Between Time Perception of Visual Stimuli and Reading Skills
09:27

Author Spotlight: Exploring the Link Between Time Perception of Visual Stimuli and Reading Skills

Published on: January 19, 2024

1.9K

Visual processing of multiple elements in the dyslexic brain: evidence for a superior parietal dysfunction.

Muriel A Lobier1, Carole Peyrin2, Cédric Pichat2

  • 1Laboratoire de Psychologie et NeuroCognition, Université Grenoble Alpes Grenoble, France ; Neuroscience Center, University of Helsinki Helsinki, Finland.

Frontiers in Human Neuroscience
|July 30, 2014
PubMed
Summary

Developmental dyslexia is linked to impaired visual attention span, affecting how the brain processes multiple elements. This study reveals reduced parietal and ventral occipito-temporal activity in dyslexic adults, impacting word recognition.

Keywords:
developmental dyslexiareadingsuperior parietal lobesvisual attention

More Related Videos

Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss
07:12

Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss

Published on: April 11, 2025

1.0K
Central and Divided Visual Field Presentation of Emotional Images to Measure Hemispheric Differences in Motivated Attention
05:36

Central and Divided Visual Field Presentation of Emotional Images to Measure Hemispheric Differences in Motivated Attention

Published on: November 16, 2017

7.0K

Related Experiment Videos

Last Updated: Apr 26, 2026

Author Spotlight: Exploring the Link Between Time Perception of Visual Stimuli and Reading Skills
09:27

Author Spotlight: Exploring the Link Between Time Perception of Visual Stimuli and Reading Skills

Published on: January 19, 2024

1.9K
Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss
07:12

Development of a Gaze-Contingent Display Framework Designed for Perceptual and Oculomotor Research with Simulated Central Vision Loss

Published on: April 11, 2025

1.0K
Central and Divided Visual Field Presentation of Emotional Images to Measure Hemispheric Differences in Motivated Attention
05:36

Central and Divided Visual Field Presentation of Emotional Images to Measure Hemispheric Differences in Motivated Attention

Published on: November 16, 2017

7.0K

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Developmental Disorders

Background:

  • The visual attention (VA) span deficit hypothesis suggests impaired multiple element processing contributes to developmental dyslexia.
  • Previous research links poor reading in dyslexic children to reduced parietal activation for multiple letter processing.
  • It remains unclear if this parietal dysfunction extends to other stimuli and its relationship with ventral occipito-temporal (vOT) activity.

Purpose of the Study:

  • To investigate whether reduced parietal activity in visual attention span impaired dyslexic adults generalizes to non-alphanumeric stimuli.
  • To explore the relationship between reduced parietal activity and reduced ventral occipito-temporal (vOT) activity in dyslexia.
  • To test the visual attention span interpretation of dyslexia.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to measure brain activity in 12 dyslexic adults and 12 skilled readers.
  • Participants performed a categorization task involving single or multiple alphanumeric and non-alphanumeric characters.
  • A priori anatomically defined regions of interest (ROIs) were used to analyze activity in the superior parietal lobule (SPL) and vOT.

Main Results:

  • Skilled readers showed stronger parietal activation for multiple vs. single element processing, which was absent in dyslexic participants.
  • Dyslexic readers exhibited significantly reduced right superior parietal lobule (SPL) activity across all stimuli types.
  • Reduced neural activity was observed in both SPL and vOT bilaterally for dyslexic participants.
  • In the right hemisphere, SPL activity covaried with vOT activity exclusively in dyslexic readers.

Conclusions:

  • The findings provide critical support for the visual attention span interpretation of the dyslexia deficit.
  • Reduced parietal and vOT activity in dyslexia may underlie deficits in automatic, ventral occipito-temporal based word recognition.
  • This study offers new insights into the neural mechanisms of developmental dyslexia.