Cited by 221Visual perception and processing mechanismsTranscranial Magnetic Stimulation StudiesTactile and Sensory Interactions

Magnetically induced phosphenes in sighted, blind and blindsighted observers

Cowey, Alan, Walsh, Vincent·2000·NeuroReport

Abstract

Direct stimulation of visual cortex can produce illusory flashes of light, called phosphenes. Here we describe the spatial and motion properties of phosphenes produced by transcranial magnetic stimulation in normal subjects and in two subjects with peripheral or cortical blindness. The totally retinally blind subject experienced normal phosphenes, apart from their concentration in the centre of the visual field, whereas the hemianopic subject, lacking area V1, did not experience phosphenes when his surviving extrastriate visual areas were stimulated. In the absence of V1, magnetically induced activity was unable to generate a conscious visual percept in the field defect.

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Crossref · 10.1097/00001756-200009280-00044

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14 of 14 references verified0 citation errors · 0 not checkable

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  • TMS of occipital visual areas can induce tactile sensations in Braille readers, similarly to visual phosphenes in the sighted.

    “Moreover, TMS of occipital visual areas can induce tactile sensations in Braille readers, similarly to visual phosphenes in the sighted (Cowey & Walsh, 2000; Penfield & Boldrey, 1937; Tehovnik et al.,2005).”

    From Designing sensory-substitution devices: Principles, pitfalls and potential1 (2016) · cites this paper as Cowey & Walsh, 2000

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Authors
Cowey, A., & Walsh, V.
Affiliations
University of Oxford (GB)
Venue
NeuroReport
Published
2000-09
Volume
11
Issue
14
Pages
3269-3273
ISSN
0959-4965 (ISSN-L)
OpenAlex
W2084229861
Cited by
221
References
14
Citations by year
2026: 4 · 2025: 1 · 2023: 4 · 2022: 1 · 2021: 7 · 2020: 6 · 2019: 2 · 2018: 4 · 2017: 7 · 2016: 4 · 2015: 5 · 2014: 6 · 2013: 16 · 2012: 10
FWCI
6.71
Type
journal article
Language
en
Open access
closed
Locations
  • Neuroreport (publishedVersion)
  • PubMed (publishedVersion)
  • UCL Discovery (University College London) (submittedVersion)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
  • Life Sciences › Neuroscience › Neurology › Transcranial Magnetic Stimulation Studies
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Tactile and Sensory Interactions
Keywords
phosphenes, transcranial magnetic stimulation, blindsight, cortical blindness, hemianopia, visual cortex, primary visual cortex, visual perception, visual field defects
MeSH terms
Adult, Brain Mapping, Electric Stimulation, Humans, Magnetics, Male, Middle Aged, Phosphenes, Visual Cortex, Visual Pathways, Blindness, Cortical, Optic Nerve Injuries

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