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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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Association Areas of the Cortex01:21

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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:
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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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Visual System01:26

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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.
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The Retina01:32

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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.
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The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
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Topographical Estimation of Visual Population Receptive Fields by fMRI
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Widespread receptive field remapping in early primate visual cortex.

Sachira Denagamage1, Mitchell P Morton1, Nyomi V Hudson2

  • 1Department of Neuroscience, Yale University, New Haven, CT 06510, USA; Interdepartmental Neuroscience Program, Yale University, New Haven, CT 06510, USA.

Cell Reports
|July 26, 2024
PubMed
Summary
This summary is machine-generated.

Predictive receptive field (RF) remapping is widespread in visual area V2, even enhancing neural feature selectivity. This challenges existing models of perceptual stability during eye movements.

Keywords:
Area V2CP: Neurosciencelaminar electrophysiologyprimatereceptive field remappingremappingsaccadesvisual cortexvisual system

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Area of Science:

  • Neuroscience
  • Visual processing
  • Perception

Background:

  • Receptive field (RF) remapping is crucial for perceptual stability during eye movements.
  • Its role in early visual cortex and effects on neural tuning remain unclear.

Purpose of the Study:

  • Investigate RF remapping in visual area V2.
  • Understand its prevalence and impact on neuronal tuning properties.

Main Methods:

  • Tracked RF remapping in hundreds of V2 neurons during a cued saccade task.
  • Recorded from multiple cortical layers and cell types.

Main Results:

  • Found widespread RF remapping across all recorded V2 neurons.
  • Observed transient enhancement of feature selectivity due to untuned suppression.

Conclusions:

  • Remapping is prevalent in early visual cortex (V2).
  • Remapping can enhance neuronal feature selectivity.
  • Findings necessitate revisions to models of perceptual stability.