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Related Concept Videos

Vision01:24

Vision

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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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Motor and Sensory Areas of the Cortex01:14

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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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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....
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Visual System01:26

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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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Association Areas of the Cortex01:21

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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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Color Vision01:24

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Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
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The Retina01:32

The Retina

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The retina is a layer of nervous tissue at the back of the eye that transduces light into neural signals. This process, called phototransduction, is carried out by rod and cone photoreceptor cells in the back of the retina.
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Updated: Dec 27, 2025

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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Unreliable feedback deteriorates information processing in primary visual cortex.

Rekha S Varrier1, Marcus Rothkirch2, Heiner Stuke2

  • 1Department of Psychiatry and Psychotherapy, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and the Berlin Institute of Health, Chariteplatz 1, 10117, Berlin, Germany; Bernstein Center for Computational Neuroscience, Berlin, Humboldt University Berlin, 10115, Berlin, Germany.

Neuroimage
|March 6, 2020
PubMed
Summary
This summary is machine-generated.

Unreliable feedback impairs decision-making and degrades neural representations, similar to sensory noise. This study shows environmental uncertainty impacts early visual processing in the primary visual cortex (V1).

Keywords:
Multivariate representationPerceptual inferenceUnreliable feedbackVisual cortexfMRI

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Psychology

Background:

  • Increased sensory uncertainty degrades perceptual decision-making and neural representations.
  • Unreliable feedback similarly impacts decision-making, reducing performance and confidence.
  • The neural basis of feedback-induced decision-making changes requires investigation.

Purpose of the Study:

  • To investigate the neural basis of perceptual decision-making changes induced by feedback reliability.
  • To examine the effects of reliable versus unreliable feedback on visual task performance and neural representations.

Main Methods:

  • Two groups of healthy participants (n=15 each) performed a visual orientation discrimination task.
  • Functional magnetic resonance imaging (fMRI) was used to monitor brain activity.
  • Participants underwent pre- and post-intervention phases with either reliable or unreliable feedback.

Main Results:

  • Unreliable feedback led to a decline in task performance compared to reliable feedback.
  • This performance decline was associated with reduced distinctness of fMRI response patterns in the primary visual cortex (V1).

Conclusions:

  • Environmental uncertainty, even from feedback, can influence perceptual inference.
  • These effects are observable at the earliest cortical processing stages, specifically in V1.
  • Feedback reliability plays a crucial role in shaping perceptual decision-making and neural processing.