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Related Concept Videos

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.
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,...
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.
Somatosensation01:33

Somatosensation

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.
Visual Agnosia01:12

Visual Agnosia

Visual agnosia is a condition characterized by the inability to recognize visually presented objects despite having normal vision. For instance, a person with visual agnosia can describe the shape and color of an object but cannot identify or name it. This impairment does not affect their visual field, acuity, color vision, brightness discrimination, language, or memory. An example of this condition in a social setting is someone at a dinner party asking for "that silver thing with a round end"...
Somatosensory, Motor, and Association Cortex01:23

Somatosensory, Motor, and Association Cortex

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 the...

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Related Experiment Video

Updated: Jul 10, 2026

A Large Lateral Craniotomy Procedure for Mesoscale Wide-field Optical Imaging of Brain Activity
10:05

A Large Lateral Craniotomy Procedure for Mesoscale Wide-field Optical Imaging of Brain Activity

Published on: May 7, 2017

[Spatial misperceptions in amblyopic vision: abnormal activation of the primary visual cortex?].

R Sireteanu1, C Bäumer, C Sârbu

  • 1Abteilung Neurophysiologie, Max-Planck-Institut für Hirnforschung, Deutschordenstrasse 46, Frankfurt. sireteanu@mpih-frankfurt.mpg.de

Klinische Monatsblatter Fur Augenheilkunde
|October 24, 2007
PubMed
Summary

Amblyopic vision exhibits spatial distortions and temporal instability, particularly in strabismic amblyopia. These visual processing issues may be linked to heightened activity in the primary visual cortex.

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Functional Magnetic Resonance Imaging (fMRI) of the Visual Cortex with Wide-View Retinotopic Stimulation
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Functional Magnetic Resonance Imaging (fMRI) of the Visual Cortex with Wide-View Retinotopic Stimulation

Published on: December 8, 2023

Related Experiment Videos

Last Updated: Jul 10, 2026

A Large Lateral Craniotomy Procedure for Mesoscale Wide-field Optical Imaging of Brain Activity
10:05

A Large Lateral Craniotomy Procedure for Mesoscale Wide-field Optical Imaging of Brain Activity

Published on: May 7, 2017

Functional Magnetic Resonance Imaging (fMRI) of the Visual Cortex with Wide-View Retinotopic Stimulation
07:11

Functional Magnetic Resonance Imaging (fMRI) of the Visual Cortex with Wide-View Retinotopic Stimulation

Published on: December 8, 2023

Area of Science:

  • Neuroscience
  • Ophthalmology
  • Visual Perception

Context:

  • Amblyopia, or 'lazy eye,' affects visual development and processing.
  • Strabismic amblyopia, characterized by eye misalignment, presents unique visual distortions.
  • Understanding the neural basis of these distortions is crucial for effective treatment.

Purpose:

  • To describe spatial distortions and temporal instability in amblyopic vision.
  • To investigate the cortical basis of spatial distortions in strabismic amblyopia.
  • To explore the neural mechanisms underlying visual processing deficits in amblyopia.

Summary:

  • Psychophysical methods revealed significant spatial distortions and temporal instability in amblyopic vision, especially in strabismic cases.
  • Functional magnetic resonance imaging (fMRI) in normal observers showed increased primary visual cortex activation when viewing patterns mimicking amblyopic spatial distortions.
  • Temporal instability was more prevalent in strabismic amblyopia, affecting higher spatial frequencies.

Impact:

  • Findings suggest spatial distortions contribute to altered primary visual cortex activity in amblyopia.
  • Temporal instability indicates involvement of dorsal 'where' visual pathway in strabismic amblyopia, beyond ventral 'what' pathway deficits.
  • This research provides insights into the neural underpinnings of visual processing abnormalities in amblyopia.