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Accuracy and interobserver reliability of scalp ictal EEG.

Publication ,  Journal Article
Walczak, TS; Radtke, RA; Lewis, DV
Published in: Neurology
December 1992

We studied the accuracy and reliability of scalp ictal EEG in 137 complex partial seizures (119 temporal and 18 extratemporal) in 35 patients in whom we knew the correct site of seizure origin because all patients had been seizure-free for more than 2 years after seizure surgery. Three electroencephalographers independently determined side of seizure origin based on activity at onset of electrographic seizure (ASO), rhythmic theta and alpha (RTA), postictal findings (PIF), and the electrographic seizure as a whole. When all seizures were analyzed, including those with generalized features or obscured by artifact, we determined side of seizure onset correctly in 76% to 83% of temporal seizures and 47% to 65% of extratemporal seizures. In most of the remainder, a lateralization judgment was impossible. When analysis was confined to those seizures in which lateralization was possible, we correctly lateralized 93% to 99% of temporal seizures and 89% to 100% of extratemporal seizures. Interobserver reliability was excellent. RTA and PIF were more accurate than ASO. RTA was significantly more common in temporal seizures. Our data indicate that lateralization by scalp EEG is highly accurate and reliable.

Duke Scholars

Published In

Neurology

DOI

ISSN

0028-3878

Publication Date

December 1992

Volume

42

Issue

12

Start / End Page

2279 / 2285

Location

United States

Related Subject Headings

  • Scalp
  • Reproducibility of Results
  • Observer Variation
  • Neurology & Neurosurgery
  • Humans
  • Functional Laterality
  • Epilepsy, Complex Partial
  • Electroencephalography
  • 3209 Neurosciences
  • 3202 Clinical sciences
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Walczak, T. S., Radtke, R. A., & Lewis, D. V. (1992). Accuracy and interobserver reliability of scalp ictal EEG. Neurology, 42(12), 2279–2285. https://doi.org/10.1212/wnl.42.12.2279
Walczak, T. S., R. A. Radtke, and D. V. Lewis. “Accuracy and interobserver reliability of scalp ictal EEG.Neurology 42, no. 12 (December 1992): 2279–85. https://doi.org/10.1212/wnl.42.12.2279.
Walczak TS, Radtke RA, Lewis DV. Accuracy and interobserver reliability of scalp ictal EEG. Neurology. 1992 Dec;42(12):2279–85.
Walczak, T. S., et al. “Accuracy and interobserver reliability of scalp ictal EEG.Neurology, vol. 42, no. 12, Dec. 1992, pp. 2279–85. Pubmed, doi:10.1212/wnl.42.12.2279.
Walczak TS, Radtke RA, Lewis DV. Accuracy and interobserver reliability of scalp ictal EEG. Neurology. 1992 Dec;42(12):2279–2285.

Published In

Neurology

DOI

ISSN

0028-3878

Publication Date

December 1992

Volume

42

Issue

12

Start / End Page

2279 / 2285

Location

United States

Related Subject Headings

  • Scalp
  • Reproducibility of Results
  • Observer Variation
  • Neurology & Neurosurgery
  • Humans
  • Functional Laterality
  • Epilepsy, Complex Partial
  • Electroencephalography
  • 3209 Neurosciences
  • 3202 Clinical sciences