Myoclonic seizures combined with partial seizures and probable pathophysiology of secondary bilateral synchrony

Katsuhiro Kobayashi, S. Maniwa, T. Ogino, H. Yoshinaga, Y. Ohtsuka, E. Oka

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Objective: We report on a patient who showed an unusual transition from complex partial seizures to a combination of myoclonic seizures and partial seizures, and then to isolated myoclonic seizures. The pathophysiological mechanism of the myoclonic seizures in this uncommon condition was studied. Methods: The interhemispheric small time differences were estimated in the ictal EEG discharges of myoclonic seizures for differentiation between primary and secondary bilateral synchrony. The estimation was performed by coherence and phase analysis based on the two-dimensional autoregressive model. Results: The estimated interhemispheric time differences were at most 27.4 ms. The ictal activity of the myoclonic seizures was suggested to originate from a cortical focus in the right hemisphere, which was also the origin of the partial seizures. Conclusion: The patient was considered to have an unusual type of myoclonic seizures with a probable pathophysiological mechanism of secondary bilateral synchrony. (C) 2000 Elsevier Science Ireland Ltd.

Original languageEnglish
Pages (from-to)1813-1816
Number of pages4
JournalClinical Neurophysiology
Volume111
Issue number10
DOIs
Publication statusPublished - Oct 1 2000

Fingerprint

Seizures
Stroke
Electroencephalography

Keywords

  • Coherence and phase analysis
  • Combined seizure
  • Ictal EEG
  • Myoclonic seizure
  • Partial seizure

ASJC Scopus subject areas

  • Clinical Neurology
  • Physiology (medical)
  • Radiology Nuclear Medicine and imaging
  • Neurology
  • Sensory Systems

Cite this

Myoclonic seizures combined with partial seizures and probable pathophysiology of secondary bilateral synchrony. / Kobayashi, Katsuhiro; Maniwa, S.; Ogino, T.; Yoshinaga, H.; Ohtsuka, Y.; Oka, E.

In: Clinical Neurophysiology, Vol. 111, No. 10, 01.10.2000, p. 1813-1816.

Research output: Contribution to journalArticle

Kobayashi, Katsuhiro ; Maniwa, S. ; Ogino, T. ; Yoshinaga, H. ; Ohtsuka, Y. ; Oka, E. / Myoclonic seizures combined with partial seizures and probable pathophysiology of secondary bilateral synchrony. In: Clinical Neurophysiology. 2000 ; Vol. 111, No. 10. pp. 1813-1816.
@article{736503347d6f4d8c8f6050e742d39dfb,
title = "Myoclonic seizures combined with partial seizures and probable pathophysiology of secondary bilateral synchrony",
abstract = "Objective: We report on a patient who showed an unusual transition from complex partial seizures to a combination of myoclonic seizures and partial seizures, and then to isolated myoclonic seizures. The pathophysiological mechanism of the myoclonic seizures in this uncommon condition was studied. Methods: The interhemispheric small time differences were estimated in the ictal EEG discharges of myoclonic seizures for differentiation between primary and secondary bilateral synchrony. The estimation was performed by coherence and phase analysis based on the two-dimensional autoregressive model. Results: The estimated interhemispheric time differences were at most 27.4 ms. The ictal activity of the myoclonic seizures was suggested to originate from a cortical focus in the right hemisphere, which was also the origin of the partial seizures. Conclusion: The patient was considered to have an unusual type of myoclonic seizures with a probable pathophysiological mechanism of secondary bilateral synchrony. (C) 2000 Elsevier Science Ireland Ltd.",
keywords = "Coherence and phase analysis, Combined seizure, Ictal EEG, Myoclonic seizure, Partial seizure",
author = "Katsuhiro Kobayashi and S. Maniwa and T. Ogino and H. Yoshinaga and Y. Ohtsuka and E. Oka",
year = "2000",
month = "10",
day = "1",
doi = "10.1016/S1388-2457(00)00390-4",
language = "English",
volume = "111",
pages = "1813--1816",
journal = "Clinical Neurophysiology",
issn = "1388-2457",
publisher = "Elsevier Ireland Ltd",
number = "10",

}

TY - JOUR

T1 - Myoclonic seizures combined with partial seizures and probable pathophysiology of secondary bilateral synchrony

AU - Kobayashi, Katsuhiro

AU - Maniwa, S.

AU - Ogino, T.

AU - Yoshinaga, H.

AU - Ohtsuka, Y.

AU - Oka, E.

PY - 2000/10/1

Y1 - 2000/10/1

N2 - Objective: We report on a patient who showed an unusual transition from complex partial seizures to a combination of myoclonic seizures and partial seizures, and then to isolated myoclonic seizures. The pathophysiological mechanism of the myoclonic seizures in this uncommon condition was studied. Methods: The interhemispheric small time differences were estimated in the ictal EEG discharges of myoclonic seizures for differentiation between primary and secondary bilateral synchrony. The estimation was performed by coherence and phase analysis based on the two-dimensional autoregressive model. Results: The estimated interhemispheric time differences were at most 27.4 ms. The ictal activity of the myoclonic seizures was suggested to originate from a cortical focus in the right hemisphere, which was also the origin of the partial seizures. Conclusion: The patient was considered to have an unusual type of myoclonic seizures with a probable pathophysiological mechanism of secondary bilateral synchrony. (C) 2000 Elsevier Science Ireland Ltd.

AB - Objective: We report on a patient who showed an unusual transition from complex partial seizures to a combination of myoclonic seizures and partial seizures, and then to isolated myoclonic seizures. The pathophysiological mechanism of the myoclonic seizures in this uncommon condition was studied. Methods: The interhemispheric small time differences were estimated in the ictal EEG discharges of myoclonic seizures for differentiation between primary and secondary bilateral synchrony. The estimation was performed by coherence and phase analysis based on the two-dimensional autoregressive model. Results: The estimated interhemispheric time differences were at most 27.4 ms. The ictal activity of the myoclonic seizures was suggested to originate from a cortical focus in the right hemisphere, which was also the origin of the partial seizures. Conclusion: The patient was considered to have an unusual type of myoclonic seizures with a probable pathophysiological mechanism of secondary bilateral synchrony. (C) 2000 Elsevier Science Ireland Ltd.

KW - Coherence and phase analysis

KW - Combined seizure

KW - Ictal EEG

KW - Myoclonic seizure

KW - Partial seizure

UR - http://www.scopus.com/inward/record.url?scp=0034308023&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034308023&partnerID=8YFLogxK

U2 - 10.1016/S1388-2457(00)00390-4

DO - 10.1016/S1388-2457(00)00390-4

M3 - Article

VL - 111

SP - 1813

EP - 1816

JO - Clinical Neurophysiology

JF - Clinical Neurophysiology

SN - 1388-2457

IS - 10

ER -