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Related Experiment Videos

Higher cortical visual function.

J J Barton1

  • 1Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA.

Current Opinion in Ophthalmology
|July 1, 1999
PubMed
Summary
This summary is machine-generated.

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Researchers explored higher cortical visual functions, confirming the fusiform gyri

Area of Science:

  • Neuroscience
  • Visual Perception
  • Cognitive Neuroscience

Background:

  • Higher cortical visual functions are complex and investigated using lesion and functional imaging.
  • Previous research implicated specific brain regions in color, face, and motion perception.

Purpose of the Study:

  • To explore higher cortical visual functions, particularly motion perception.
  • To investigate the role of specific brain regions in visual processing.
  • To examine blindsight phenomena and its characteristics.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) studies.
  • Lesion studies examining occipitotemporal cortex damage.
  • Psychophysical assessments of patients with motion blindness.

Related Experiment Videos

  • Comparative studies with animal models (monkeys).

    • Main Results:

    • fMRI identified fusiform gyri in color/face perception and multiple regions (V5, V3A, kinetic occipital) in motion perception.
    • Blindsight studies reported findings on spatial summation and inhibition of return, refuting criterion shift.
    • Occipitotemporal lesions caused deficits in first- and second-order motion perception.
    • Patient LM's motion-blindness mirrored deficits in monkeys with V5 ablations.

    Conclusions:

    • Suggests a homology between monkey V5 and human lateral occipitotemporal motion areas.
    • Highlights the involvement of multiple cortical regions in complex visual processing.
    • Blindsight research continues to evolve, with some conflicting findings on ocular motor responses.