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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.
Anatomy of the Eyeball01:20

Anatomy of the Eyeball

The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle layer, the vascular tunic,...
Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

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.
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...
Accessory Structures of the Eye01:17

Accessory Structures of the Eye

Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...
Association Areas of the Cortex01:21

Association Areas of the Cortex

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 8, 2026

Monocular Visual Deprivation and Ocular Dominance Plasticity Measurement in the Mouse Primary Visual Cortex
08:42

Monocular Visual Deprivation and Ocular Dominance Plasticity Measurement in the Mouse Primary Visual Cortex

Published on: February 8, 2020

Structure and function relationships during ocular dominance plasticity in the visual cortex.

Martijn Dahlhaus1, Christiaan N Levelt

  • 1Department of Molecular Visual Plasticity, Netherlands Institute for Neuroscience an Institute of the Royal Netherlands Academy of Arts and Sciences, Amsterdam, The Netherlands.

Reviews in the Neurosciences
|October 1, 2010
PubMed
Summary
This summary is machine-generated.

Learning involves neocortex changes in neuronal circuits via experience. This study reviews structural changes in visual cortex synapses during experience-dependent plasticity, highlighting future research directions.

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Area of Science:

  • Neuroscience
  • Synaptic Plasticity
  • Visual Cortex Research

Background:

  • The neocortex's ability to learn depends on experience-driven changes in neuronal circuits.
  • Synaptic plasticity, involving synapse formation, elimination, and strength adjustment, underlies these changes.
  • The primary visual cortex serves as a model system for studying neocortical plasticity.

Purpose of the Study:

  • To review current knowledge on structural synaptic changes in the visual cortex during experience-dependent plasticity.
  • To identify unresolved questions in the field.
  • To discuss technological advancements for future research.

Main Methods:

  • Literature review of studies on experience-dependent plasticity in the visual cortex.
  • Analysis of structural changes in both inhibitory and excitatory synapses.
  • Discussion of methodologies used to study synaptic plasticity.

Main Results:

  • Experience-dependent plasticity in the visual cortex involves significant structural alterations at both excitatory and inhibitory synapses.
  • Specific patterns of synapse formation, elimination, and strength modulation are associated with visual learning.
  • The balance between excitation and inhibition is dynamically regulated through these structural changes.

Conclusions:

  • Structural synaptic modifications are fundamental to experience-dependent plasticity in the visual cortex.
  • Further research is needed to fully elucidate the molecular mechanisms and functional consequences of these changes.
  • Emerging technologies promise to accelerate discoveries in visual cortex plasticity.