| Multi-channel visual evoked potentials in early compressive lesions of the chiasm. | |
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MedLine Citation:
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PMID: 3168727 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The sensitivity of transient, pattern-reversal visual evoked potentials in the detection of early compressive lesions of the chiasm is controversial in the literature. There have been claims that the technique is capable of detecting an abnormality in the absence of any demonstrable visual field loss, and conversely that VEPs are not reliable for the detection of chiasmal lesions even when a bitemporal hemianopsia is clearly recordable. Using nine patients with pituitary adenoma we attempted to quantify the extent of visual field loss and correlate the diagnostic capabilities of topographically recorded potentials following full- and half-field stimulus presentations of various field and check sizes. Differential light thresholds were measured and quantified according to one investigator's graticule for the neural representation of visual space. Results show a strong correlation between the degree of information loss and the diagnostic value of the visual evoked potential. The technique was, however, capable of detecting abnormality in the absence of recordable field loss when large field and check sizes were used. |
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Authors:
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J G Flanagan; G F Harding |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Documenta ophthalmologica. Advances in ophthalmology Volume: 69 ISSN: 0012-4486 ISO Abbreviation: Doc Ophthalmol Publication Date: 1988 Jul |
Date Detail:
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Created Date: 1988-11-15 Completed Date: 1988-11-15 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0370667 Medline TA: Doc Ophthalmol Country: NETHERLANDS |
Other Details:
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Languages: eng Pagination: 271-81 Citation Subset: IM |
Affiliation:
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School of Optometry, University of Waterloo, Ontario, Canada. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adenoma
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complications*,
physiopathology Adult Evoked Potentials, Visual* Humans Male Nerve Compression Syndromes / etiology, physiopathology* Optic Chiasm* Photic Stimulation Pituitary Neoplasms / complications*, physiopathology Reaction Time Scalp / physiopathology Visual Fields |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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