Linked Life Data

7489669

Source:http://linkedlifedata.com/resource/pubmed/id/7489669

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1996-1-4
pubmed:abstractText
The VEPs of 195 patients referred for supportive evidence of multiple sclerosis or optic neuritis were studied by a new method of interleaved checkerboard reversal stimulation of different areas of the visual field. In the first group of 95 patients checks of 40' subtense reversed in the whole field (28 degrees x 20 degrees), alternatively in the left and right hemifields and alternately in the central (5 degrees radius) and peripheral fields. In the second group of 100 patients checks reversed in the whole field and in interleaved mode in 3 visual field areas, comprising the central (4 degrees radius) and left and right hemisurround fields. In the first group abnormal responses were recorded from 52 eyes and there was partial disagreement among the stimulus conditions in 10 of the 52. Abnormalities were seen uniquely to central field stimulation in 3 eyes but never to whole field stimulation alone. In the second group abnormal responses were recorded in 58 eyes, again never uniquely to whole field stimulation, while abnormalities confined to one or two areas of the visual field were seen in 24, providing evidence of peripheral field involvement alone in 8 eyes. In the first group, waveforms created from the sum of the left and right hemifield and central and peripheral field responses showed quite close conformity to the whole field VEP, although amplitudes were significantly lower and latencies significantly shorter. In 7 eyes responses would have been differently classified (normal or abnormal) using the sum as compared with the whole fields.(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0013-4694
pubmed:author
pubmed:issnType
Print
pubmed:volume
96
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
485-94
pubmed:dateRevised
2008-9-9
pubmed:meshHeading
pubmed:year
1995
pubmed:articleTitle
Clinical evaluation of VEPs to interleaved checkerboard reversal stimulation of central, hemi- and peripheral fields.
pubmed:affiliation
Department of Clinical Neurophysiology, National Hospital for Neurology and Neurosurgery, London, UK.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't