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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
6
|
| pubmed:dateCreated |
1976-7-6
|
| pubmed:abstractText |
This note describes a method for rapidly measuring the latency of a steady-state visual evoked potential (EP). Three sinewaves of different frequencies (F1, F2 and F3 c/sec) are summed, and the resulting waveform modulates either light intensity (for flicker stimulation) or spatial contrast (for pattern stimulation). Three evoked potentials of frequencies F1, F2 and F3 c/sec respectively are stimultaneously recorded by running three Fourier analysers in parallel. The outputs of the three analysers are presented in a single polar plot so as directly to display the three values of EP amplitude and phase. Practical methods for generating the pattern and flicker stimuli are described.
|
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:citationSubset |
IM
|
| pubmed:status |
MEDLINE
|
| pubmed:month |
Jun
|
| pubmed:issn |
0013-4694
|
| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:volume |
40
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
654-60
|
| pubmed:dateRevised |
2008-9-9
|
| pubmed:meshHeading |
pubmed-meshheading:57051-Computers, Analog,
pubmed-meshheading:57051-Electroencephalography,
pubmed-meshheading:57051-Evoked Potentials,
pubmed-meshheading:57051-Humans,
pubmed-meshheading:57051-Pattern Recognition, Visual,
pubmed-meshheading:57051-Photic Stimulation,
pubmed-meshheading:57051-Reaction Time,
pubmed-meshheading:57051-Time Factors,
pubmed-meshheading:57051-Visual Perception
|
| pubmed:year |
1976
|
| pubmed:articleTitle |
Latencies of evoked potentials to flicker and to pattern speedily estimated by simultaneous method.
|
| pubmed:publicationType |
Journal Article
|