The DOI matches its Crossref record; 5 of the 5 references it cites were found in a registry or an index.
Phosphenes and transient scotomas induced by magnetic stimulation of the occipital lobe: their topographic relationship
Abstract
Transcranial magnetic stimulation (TMS) of the visual cortex is known to induce phosphenes and is able to suppress visual perception. To address the topographic relationship of phosphenes and transient scotomas, the visual field of 10 normal subjects was investigated using a perimetric approach. The central visual field (diameter: 20 degrees) was tested at 32 sites. Perceptual thresholds were determined by presenting 1 ms test spots flashed with varying intensity in random order. TMS was applied with a focal figure-of-eight coil placed over the inion. All subjects perceived phosphenes, mostly restricted to one of the lower quadrants within the visual field. In 13 out of 15 investigations, a magnetic stimulus triggered 100 ms after the visual target resulted in a relative scotoma with threshold changes of 8 dB or more. In 9 of 13 investigations, scotomas coincided spatially with sketches of phosphenes made by subjects in a separate test. Scotomas covered only a small percentage of the total visual field, which may explain the failure of previous studies to find perceptual suppression with the focal coil. The present result demonstrates that phosphenes evoked during TMS can serve as a guide for optimal visual stimulus alignment in neuropsychological experiments.
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“Modeling and experimental work suggest that the spatial resolution of direct TMS stimulation is 5–10 mm (11, 41).”
From Disruption of the right temporoparietal junction with transcranial magnetic stimulation reduces the role of beliefs in moral judgments (2010) · cites this paper as [41]
Citations
Cites
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Cited by
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Rossini, P., Burke, D. F., Chen, R., Cohen, L., Daskalakis, Z., Iorio, R. D., di Lazzaro, V., Ferreri, F., Fitzgerald, P., George, M., et al. (2015) · Clinical Neurophysiology · doi:10.1016/j.clinph.2015.02.001 · Cited by 2,729
“Similarly to the motor cortex non-motor areas can also be mapped; for example, one can produce phosphenes in different regions of the visual field with an accuracy of 1–2 degrees of visual angle by stimulating appropriate parts of the occipital cortex (Kammer, 1999; Merabet et al., 2003).”
BackgroundConsciousness, accessibility, and the mesh between psychology and neuroscience
Block, N. (2007) · Behavioral and Brain Sciences · doi:10.1017/s0140525x07002786 · Cited by 1,146
Galea, J. M., Vazquez, A., Pasricha, N., Orban de Xivry, J.-J., & Celnik, P. (2011) · Cerebral Cortex · doi:10.1093/cercor/bhq246 · Cited by 760
“Previous studies have demonstrated that TMS pulses delivered over Oz can elicit light sensations, called stationary phosphenes (Meyer et al. 1991; Marg and Rudiak 1994; Kammer 1999; Antal et al. 2003).”
BackgroundFast Backprojections from the Motion to the Primary Visual Area Necessary for Visual Awareness
Pascual-Leone, A., & Walsh, V. (2001) · Science · doi:10.1126/science.1057099 · Cited by 761
Two neural correlates of consciousness
Block, N. (2005) · Trends in Cognitive Sciences · doi:10.1016/j.tics.2004.12.006 · Cited by 713
Metadata
- Authors
- Kammer, T.
- Affiliations
- Max Planck Society (DE)
- Corresponding author
- Kammer, Thomas
- ORCID
- Kammer, Thomas
- Venue
- Neuropsychologia
- Publisher
- Elsevier BV
- Published
- 1998-11
- Volume
- 37
- Issue
- 2
- Pages
- 191-198
- ISSN
- 0028-3932 (ISSN-L)
- OpenAlex
- W1494786883
- Cited by
- 170
- References
- 5
- Citations by year
- 2026: 2 · 2025: 1 · 2024: 1 · 2023: 2 · 2022: 6 · 2021: 6 · 2020: 7 · 2019: 1 · 2018: 2 · 2017: 6 · 2016: 5 · 2015: 8 · 2014: 6 · 2013: 8 · 2012: 3
- FWCI
- 3.03
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Neuropsychologia (publishedVersion)
- PubMed (publishedVersion)
- MPG.PuRe (Max Planck Society) (submittedVersion)
- Topics
- Life Sciences › Neuroscience › Neurology › Transcranial Magnetic Stimulation Studies
- Life Sciences › Neuroscience › Cognitive Neuroscience › Visual perception and processing mechanisms
- Life Sciences › Neuroscience › Cognitive Neuroscience › Tactile and Sensory Interactions
- Keywords
- phosphenes, transcranial magnetic stimulation, visual cortex, occipital lobe, visual field topography, perceptual suppression, visual perception, visual field testing
- MeSH terms
- Adult, Brain Mapping, Female, Humans, Magnetics, Male, Occipital Lobe, Phosphenes, Scotoma, Time Factors, Visual Fields
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