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Related Experiment Video

Updated: May 14, 2026

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

Abnormal visual field maps in human cortex: a mini-review and a case report.

Koen V Haak1, Dave R M Langers2, Remco Renken3

  • 1Laboratory for Experimental Ophthalmology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands; BCN Neuroimaging Center, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands; Graduate School of Medical Sciences, Research School of Behavioral and Cognitive Neurosciences, University of Groningen, The Netherlands.

Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
|January 26, 2013
PubMed
Summary

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Transhemispheric optic pathway degeneration following unilateral post-geniculate lesions.

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Human visual cortex maps remain stable after hemispherectomy. Abnormal brain activity may reflect developmental effects, not necessarily cortical remapping, urging caution in interpretation.

Area of Science:

  • Neuroscience
  • Visual Perception
  • Brain Plasticity

Background:

  • The human visual cortex contains organized maps of the visual field.
  • Research investigates if and when these maps change following damage to visual circuitry.
  • Functional magnetic resonance imaging (fMRI) studies examine visual field maps after retinal lesions, brain injury, and atypical projections.

Observation:

  • Abnormal fMRI activity is frequently observed in cases of visual system damage.
  • However, this abnormal activity does not always indicate cortical remapping.
  • Alternative explanations include task effects and the revelation of underlying system dynamics.

Findings:

  • A patient who underwent hemispherectomy at age three showed unaffected retinotopic organization in early visual cortex.
Keywords:
Case reportCortical reorganizationHemispherectomyReviewVisual field maps

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Last Updated: May 14, 2026

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

Motion-Acuity Test for Visual Field Acuity Measurement with Motion-Defined Shapes
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Published on: February 23, 2024

Topographical Estimation of Visual Population Receptive Fields by fMRI
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Topographical Estimation of Visual Population Receptive Fields by fMRI

Published on: February 3, 2015

  • The remaining lateral occipital cortex exhibited an unusually large representation of the visual field's center.
  • Neuronal receptive fields in these regions were found to be exceptionally small.

    • Implications:

    • Abnormal fMRI findings in visual cortex may not solely represent cortical remapping.
    • Developmental timing, particularly during critical periods, can influence brain organization and function.
    • Careful consideration of alternative explanations is crucial when interpreting altered fMRI activity in neurological conditions.