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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

Motor and Sensory Areas of the Cortex

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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.
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....
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Visual System01:26

Visual System

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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.
Once through the pupil, the light passes through the lens, a...
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Somatosensory, Motor, and Association Cortex01:24

Somatosensory, Motor, and Association Cortex

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The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at...
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Color Vision01:24

Color Vision

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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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Association Areas of the Cortex01:21

Association Areas of the Cortex

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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:
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,...
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Related Experiment Video

Updated: Jun 17, 2025

Monocular Visual Deprivation and Ocular Dominance Plasticity Measurement in the Mouse Primary Visual Cortex
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Visual experience reduces the spatial redundancy between cortical feedback inputs and primary visual cortex neurons.

Rodrigo F Dias1, Radhika Rajan1, Margarida Baeta1

  • 1Champalimaud Neuroscience Programme, Champalimaud Foundation, Lisbon, Portugal.

Neuron
|August 13, 2024
PubMed
Summary
This summary is machine-generated.

Visual experience shapes how brain areas connect, refining feedback pathways in the mouse visual cortex. This learning process minimizes input overlap, improving visual processing and surround modulation.

Keywords:
cortical feedbackexperience-dependent plasticityhierarchical computationhigher visual areasmousepredictive codingtwo-photon imagingvisual cortex

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Area of Science:

  • Neuroscience
  • Visual System Research
  • Cortical Plasticity

Background:

  • The role of visual experience in organizing cortical feedback (FB) connections is not well understood.
  • Understanding how inter-areal connections form is crucial for deciphering brain computation.

Purpose of the Study:

  • To investigate how visual experience influences the retinotopic specificity of feedback projections from the lateromedial (LM) visual area to the primary visual cortex (V1).
  • To elucidate the mechanism by which visual experience shapes cortical circuit organization and function.

Main Methods:

  • Manipulating visual experience (normal vs. dark-rearing) in mice.
  • Measuring retinotopic specificity of LM projections to V1 using anatomical and physiological techniques.
  • Computational modeling to recapitulate experimental observations.

Main Results:

  • LM inputs to V1 were retinotopically matched in both normally and dark-reared mice.
  • Visual exposure reduced the spatial overlap of LM inputs to V1.
  • Feedback inputs from layer 5 (L5) conveyed more surround information than those from layer 2/3 (L2/3).
  • The organization of LM inputs from L5 depended on orientation preference and was impaired by dark rearing.

Conclusions:

  • Visual experience actively refines cortical feedback organization by minimizing receptive field overlap.
  • This experience-dependent refinement provides a mechanism for learning expected inter-areal coactivation patterns.
  • The findings offer insights into how visual experience shapes surround modulations in the visual cortex.