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Related Concept Videos

Vision01:24

Vision

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.
Visual System01:26

Visual System

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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Related Experiment Video

Updated: May 8, 2026

Single-unit In vivo Recordings from the Optic Chiasm of Rat
11:00

Single-unit In vivo Recordings from the Optic Chiasm of Rat

Published on: April 2, 2010

Visual experience specifically regulates synaptic molecules in rat visual cortex.

A A Schoups, I B Black

    Journal of Cognitive Neuroscience
    |August 23, 2013
    PubMed
    Summary
    This summary is machine-generated.

    Early visual experience significantly impacts synaptic development in the rat visual cortex. Visual deprivation selectively hinders the growth of specific synaptic proteins, highlighting experience-dependent neural plasticity.

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    Area of Science:

    • Neuroscience
    • Developmental Biology
    • Molecular Biology

    Background:

    • Synaptic structure undergoes significant changes during postnatal development.
    • Environmental factors, such as visual experience, are known to modulate neural development.
    • The major postsynaptic density protein (mPSDp) is a key molecular component of synapses.

    Purpose of the Study:

    • To investigate the environmental modulation of synaptic molecular structure in the rat visual cortex.
    • To determine how visual deprivation affects the development of the major postsynaptic density protein (mPSDp).
    • To examine the specificity of experience-dependent modulation in different cortical areas and developmental stages.

    Main Methods:

    • Quantification of total synaptic membrane (SM) protein and the major postsynaptic density protein (mPSDp) in rat visual cortex.
    • Comparison of protein levels during normal postnatal development and after periods of visual deprivation (dark rearing).
    • Analysis of synaptic protein changes in visual, parietal, and prefrontal cortices at different developmental stages.

    Main Results:

    • The mPSDp exhibited a significantly greater increase (455-fold) than total SM protein (32-fold) during normal development, indicating differential molecular component growth.
    • Visual deprivation during early postnatal weeks reduced total SM protein to 66% of normal and preferentially inhibited mPSDp development to 34% of normal.
    • Light deprivation did not affect synapses in nonvisual cortical areas, and visual experience did not alter mPSDp levels in adult rats, demonstrating area and stage specificity.

    Conclusions:

    • Early visual experience is crucial for the selective and specific molecular development of synapses in the visual cortex.
    • Visual deprivation leads to a selective inhibition of specific synaptic components, particularly the mPSDp.
    • Experience-dependent synaptic modulation is specific to the visual cortex and occurs during critical early developmental periods.