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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.
Feedback Inhibition00:46

Feedback Inhibition

Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell!
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...
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.
The Retina01:32

The Retina

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.
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,...

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Updated: Jun 14, 2026

Intracortical Inhibition Within the Primary Motor Cortex Can Be Modulated by Changing the Focus of Attention
09:48

Intracortical Inhibition Within the Primary Motor Cortex Can Be Modulated by Changing the Focus of Attention

Published on: September 11, 2017

Function of inhibition in visual cortical processing.

Henry J Alitto1, Yang Dan

  • 1Department of Molecular and Cell Biology, Howard Hughes Medical Institute, University of California, Berkeley, 94720, USA. hjalitto@gmail.com <hjalitto@gmail.com>

Current Opinion in Neurobiology
|March 24, 2010
PubMed
Summary
This summary is machine-generated.

GABAergic inhibition shapes visual cortex processing by refining receptive fields and orchestrating network states. Recent molecular advances enable in vivo investigation of these crucial inhibitory roles.

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Last Updated: Jun 14, 2026

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09:48

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Published on: September 11, 2017

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08:55

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Published on: February 8, 2018

Multiscale Investigations of Cortical Processing by Integrating Laminar Polytrodes and Optogenetics with Micro Electrocorticography in Rodents
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Area of Science:

  • Neuroscience
  • Visual Cortex Research
  • Inhibitory Neurotransmission

Background:

  • Sensory processing in the primary visual cortex (V1) is well-studied.
  • The specific function of GABAergic inhibition within V1 remains incompletely understood.
  • Molecular biology advancements now facilitate in vivo studies of inhibitory processes.

Purpose of the Study:

  • To investigate the role of GABAergic inhibition in V1.
  • To understand how inhibition influences cortical processing at cellular and network levels.

Main Methods:

  • Utilizing advances in molecular biology for in vivo investigation.
  • Examining inhibitory processes at single cell and network levels.

Main Results:

  • GABAergic inhibition shapes cortical receptive fields at the single cell level.
  • Inhibition is critical for generating cortical oscillations.
  • Inhibition plays a key role in setting the overall network state.

Conclusions:

  • GABAergic inhibition is a fundamental mechanism for sensory processing in V1.
  • Inhibitory processes are vital for both fine-tuning neural responses and coordinating network activity.
  • Further in vivo research is essential to fully elucidate the impact of GABAergic inhibition.