Cited by 15Neuroscience and Neural EngineeringTactile and Sensory InteractionsVisual perception and processing mechanisms

Neurophysiological considerations for visual implants

Meikle, Sabrina J., Wong, Yan T.·2022·Brain Structure and Function

Abstract

Neural implants have the potential to restore visual capabilities in blind individuals by electrically stimulating the neurons of the visual system. This stimulation can produce visual percepts known as phosphenes. The ideal location of electrical stimulation for achieving vision restoration is widely debated and dependent on the physiological properties of the targeted tissue. Here, the neurophysiology of several potential target structures within the visual system will be explored regarding their benefits and downfalls in producing phosphenes. These regions will include the lateral geniculate nucleus, primary visual cortex, visual area 2, visual area 3, visual area 4 and the middle temporal area. Based on the existing engineering limitations of neural prostheses, we anticipate that electrical stimulation of any singular brain region will be incapable of achieving high-resolution naturalistic perception including color, texture, shape and motion. As improvements in visual acuity facilitate improvements in quality of life, emulating naturalistic vision should be one of the ultimate goals of visual prostheses. To achieve this goal, we propose that multiple brain areas will need to be targeted in unison enabling different aspects of vision to be recreated.

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Crossref · 10.1007/s00429-021-02417-2

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  • Placing the electrodes in higher visual areas where spatial representation is still preserved could be a possible solution to enlarge the visual field.

    “Therefore, placing the electrodes in higher visual areas where spatial representation is still preserved [26,103] could be a possible solution to enlarge the visual field.”
  • Placing the electrodes in higher visual areas could be a possible solution to enlarge artificial vision.

    “Although placing the electrodes in higher visual areas [103] could be a possible solution to enlarge artificial vision.”

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Authors
Meikle, S. J., & Wong, Y. T.
Affiliations
Monash University (AU)
Corresponding author
Wong, Yan T.
Venue
Brain Structure and Function
Published
2021-11-13
Volume
227
Issue
4
Pages
1523-1543
ISSN
  • 1863-2653 (ISSN-L)
  • 1863-2661
OpenAlex
W3214371282
Cited by
15
References
152
Citations by year
2026: 2 · 2025: 3 · 2024: 3 · 2023: 4 · 2022: 3
FWCI
0.38
Type
journal article
Language
en
Open access
closed
Locations
  • Brain Structure and Function (publishedVersion)
  • PubMed (publishedVersion)
Funders
Australian Research Council (DP200100179)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neural Engineering
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Tactile and Sensory Interactions
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
Keywords
neural prostheses, phosphenes, vision restoration, blindness, lateral geniculate nucleus, primary visual cortex, middle temporal area, electrical stimulation, neurophysiology, visual acuity
MeSH terms
Electric Stimulation, Humans, Phosphenes, Quality of Life, Vision, Ocular, Visual Cortex, Visual Perception, Visual Prosthesis

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