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Added clinical value of the inferior temporal EEG electrode chain

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  • Anders Bach Justesen, Department of Clinical Neurophysiology, Danish Epilepsy Center, Dianalund, Denmark; Department of Clinical Neurophysiology, Aarhus University Hospital, Aarhus C, Denmark.
  • ,
  • Ann Berit Eskelund Johansen, Department of Clinical Neurophysiology, Danish Epilepsy Center, Dianalund, Denmark; Department of Clinical Neurophysiology, Aarhus University Hospital, Aarhus C, Denmark.
  • ,
  • Noomi Ida Martinussen, Department of Clinical Neurophysiology, Danish Epilepsy Center, Dianalund, Denmark; Department of Clinical Neurophysiology, Aarhus University Hospital, Aarhus C, Denmark.
  • ,
  • Danielle Wasserman, Department of Clinical Neurophysiology, Danish Epilepsy Center, Dianalund, Denmark; Department of Clinical Neurophysiology, Aarhus University Hospital, Aarhus C, Denmark.
  • ,
  • Daniella Terney, Department of Clinical Neurophysiology, Danish Epilepsy Center, Dianalund, Denmark; Department of Clinical Neurophysiology, Aarhus University Hospital, Aarhus C, Denmark.
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  • Pirgit Meritam, Department of Clinical Neurophysiology, Danish Epilepsy Center, Dianalund, Denmark; Department of Clinical Neurophysiology, Aarhus University Hospital, Aarhus C, Denmark.
  • ,
  • Elena Gardella, Department of Clinical Neurophysiology, Danish Epilepsy Center, Dianalund, Denmark; University of Southern Denmark, Odense, Denmark.
  • ,
  • Sándor Beniczky

OBJECTIVE: To investigate the diagnostic added value of supplementing the 10-20 EEG array with six electrodes in the inferior temporal chain.

METHODS: EEGs were recorded with 25 electrodes: 19 positions of the 10-20 system, and six additional electrodes in the inferior temporal chain (F9/10, T9/10, P9/10). Five-hundred consecutive standard and sleep EEG recordings were reviewed using the 10-20 array and the extended array. We identified the recordings with EEG abnormalities that had peak negativities at the inferior temporal electrodes, and those that only were visible at the inferior temporal electrodes.

RESULTS: From the 286 abnormal recordings, the peak negativity was at the inferior temporal electrodes in 81 cases (28.3%) and only visible at the inferior temporal electrodes in eight cases (2.8%). In the sub-group of patients with temporal abnormalities (n = 134), these represented 59% (peak in the inferior chain) and 6% (only seen at the inferior chain).

CONCLUSIONS: Adding six electrodes in the inferior temporal electrode chain to the 10-20 array improves the localization and identification of EEG abnormalities, especially those located in the temporal region.

SIGNIFICANCE: Our results suggest that inferior temporal electrodes should be added to the EEG array, to increase the diagnostic yield of the recordings.

Original languageEnglish
JournalClinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology
Volume129
Issue1
Pages (from-to)291-295
Number of pages5
ISSN1388-2457
DOIs
Publication statusPublished - Jan 2018

    Research areas

  • Journal Article

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