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Related Concept Videos

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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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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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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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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Anatomy of the Eyeball01:20

Anatomy of the Eyeball

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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...
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Somatosensory, Motor, and Association Cortex01:23

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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Related Experiment Video

Updated: Apr 23, 2026

Using Looming Visual Stimuli to Evaluate Mouse Vision
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Higher brain functions served by the lowly rodent primary visual cortex.

Jeffrey P Gavornik1, Mark F Bear2

  • 1Howard Hughes Medical Institute, The Picower Institute for Learning and Memory, Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

Learning & Memory (Cold Spring Harbor, N.Y.)
|September 17, 2014
PubMed
Summary
This summary is machine-generated.

Neuroplasticity extends beyond early development. Adult primary visual cortex (V1) demonstrates significant learning and memory functions, challenging previous scientific understanding of brain development.

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Area of Science:

  • Neuroscience
  • Neuroplasticity
  • Visual Cortex Function

Background:

  • Ocular dominance plasticity in primary visual cortex (V1) was first described over 50 years ago.
  • Historically, V1 was considered immutable after a critical developmental period.
  • Mice are now the preferred model for studying visual cortical plasticity.

Purpose of the Study:

  • To investigate the dynamic nature of the adult primary visual cortex.
  • To explore forms of response modification beyond ocular dominance plasticity in V1.
  • To understand the mechanistic basis of learning and memory in V1.

Main Methods:

  • Studies utilizing mice as the model organism.
  • Investigation of monocular deprivation effects on V1.
  • Analysis of response modifications in adult V1.

Main Results:

  • Adult V1 exhibits ocular dominance plasticity, contrary to previous dogma.
  • Adult V1 demonstrates higher brain functions, including stimulus familiarity, reward prediction, and sequence learning.
  • Primary visual cortex is not a static feature detector but a dynamic area.

Conclusions:

  • The adult primary visual cortex is a dynamic region capable of significant functional modification.
  • V1 plasticity supports learning and memory, functions previously attributed only to higher cortical areas.
  • Rodent V1 serves as a valuable model for studying the mechanisms of higher brain functions.