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Related Concept Videos

Visual Agnosia01:12

Visual Agnosia

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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...
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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.
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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:
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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.
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Working memory refers to a combination of components, including short-term memory and attention, that allow an individual to hold information temporarily as we perform cognitive tasks. It is an essential cognitive function that enables the execution of complex tasks such as problem-solving, comprehension, and reasoning. Unlike short-term memory, which simply involves the storage of information for a brief period, working memory involves the active manipulation and processing of this...
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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.
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Related Experiment Video

Updated: Jan 15, 2026

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

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Visual Working Memory Representations Selectively Drop in Contralateral Visual Cortex but Remain Decodable in

Tao He1,2, Yao Shi1, Matthias Ekman2

  • 1Beijing Language and Culture University.

Journal of Cognitive Neuroscience
|October 6, 2025
PubMed
Summary
This summary is machine-generated.

Visual working memory (VWM) representations are global and adapt to eye movements. Early visual cortex (EVC) representations are disrupted by saccades, while parietal cortex maintains VWM information.

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Visual Perception

Background:

  • The visual system processes immediate stimuli and maintains information in visual working memory (VWM).
  • Unresolved questions concern the spatial specificity of VWM representations and the impact of eye movements on them.

Purpose of the Study:

  • To investigate whether VWM representations are spatially specific in the absence of eye movements.
  • To determine how eye movements affect VWM representations in early visual cortex (EVC) and parietal cortex.

Main Methods:

  • Used fMRI to measure delay-related activity.
  • Applied multivariate pattern analysis (MVPA) to decode VWM representations.
  • Compared VWM representations in no-saccade and saccade conditions.

Main Results:

  • VWM representations were spatially global in both hemispheres across most regions in the no-saccade condition.
  • Intraparietal sulcus VWM representations remained decodable after saccades.
  • Contralateral EVC VWM representations were disrupted by saccades, but ipsilateral EVC and overall EVC representations were not significantly affected.

Conclusions:

  • EVC contributes to VWM flexibly and adaptively.
  • Parietal cortex plays a crucial role in maintaining VWM information across eye movements.
  • Findings support the role of EVC and parietal cortex as neural substrates for memory storage.