Abstract
Intracranial electroencephalography (IEEG) is useful as an evaluation component of resective surgery when the results of noninvasive tests are incongruent in patients with refractory neocortical epilepsy. High-frequency oscillations (HFOs>80 Hz) have recently been recognized as having a strong relationship to the epileptogenic zone, and the complete resection of HFOs has been considered a favorable prognostic indicator for surgical outcome. It is sometimes difficult, however, to comprehend dynamic changes in ictal HFOs recorded via subdural electrodes. We performed surgical treatment on a medically intractable patient diagnosed with occipital lobe epilepsy after analyzing the patient's HFOs with IEEG using the original program. The patient has achieved seizure-free status one year after surgery. Our method of creating a brain surface topographic map of interictal HFOs and a topographic movie of ictal HFOs was useful for easy understanding of seizure onset zone and epileptic HFOs propagation. It may also be helpful for determining the necessary extent of surgical resection to include the epileptogenic zone, thus promoting better postsurgical seizure outcomes.
| Original language | English |
|---|---|
| Pages (from-to) | 32-39 |
| Number of pages | 8 |
| Journal | Japanese Journal of Neurosurgery |
| Volume | 24 |
| Issue number | 1 |
| Publication status | Published - 2015 |
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Keywords
- High frequency oscillations
- Intracranial electroencephalography
- Neocortical epilepsy
- Respective surgery
- Topographic map
ASJC Scopus subject areas
- Clinical Neurology
- Surgery
Cite this
Epilepsy surgery for refractory focal epilepsy based on the analysis of high frequency oscillations with intracranial electroencephalography : A case report. / Kondo, Akihiko; Akiyama, Tomoyuki; Agari, Takashi; Oka, Makio; Kobayashi, Yoshinori; Hayashi, Yumiko; Shibata, Takashi; Shinji, Yukei; Kobayashi, Katsuhiro; Yoshinaga, Harumi; Date, Isao.
In: Japanese Journal of Neurosurgery, Vol. 24, No. 1, 2015, p. 32-39.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Epilepsy surgery for refractory focal epilepsy based on the analysis of high frequency oscillations with intracranial electroencephalography
T2 - A case report
AU - Kondo, Akihiko
AU - Akiyama, Tomoyuki
AU - Agari, Takashi
AU - Oka, Makio
AU - Kobayashi, Yoshinori
AU - Hayashi, Yumiko
AU - Shibata, Takashi
AU - Shinji, Yukei
AU - Kobayashi, Katsuhiro
AU - Yoshinaga, Harumi
AU - Date, Isao
PY - 2015
Y1 - 2015
N2 - Intracranial electroencephalography (IEEG) is useful as an evaluation component of resective surgery when the results of noninvasive tests are incongruent in patients with refractory neocortical epilepsy. High-frequency oscillations (HFOs>80 Hz) have recently been recognized as having a strong relationship to the epileptogenic zone, and the complete resection of HFOs has been considered a favorable prognostic indicator for surgical outcome. It is sometimes difficult, however, to comprehend dynamic changes in ictal HFOs recorded via subdural electrodes. We performed surgical treatment on a medically intractable patient diagnosed with occipital lobe epilepsy after analyzing the patient's HFOs with IEEG using the original program. The patient has achieved seizure-free status one year after surgery. Our method of creating a brain surface topographic map of interictal HFOs and a topographic movie of ictal HFOs was useful for easy understanding of seizure onset zone and epileptic HFOs propagation. It may also be helpful for determining the necessary extent of surgical resection to include the epileptogenic zone, thus promoting better postsurgical seizure outcomes.
AB - Intracranial electroencephalography (IEEG) is useful as an evaluation component of resective surgery when the results of noninvasive tests are incongruent in patients with refractory neocortical epilepsy. High-frequency oscillations (HFOs>80 Hz) have recently been recognized as having a strong relationship to the epileptogenic zone, and the complete resection of HFOs has been considered a favorable prognostic indicator for surgical outcome. It is sometimes difficult, however, to comprehend dynamic changes in ictal HFOs recorded via subdural electrodes. We performed surgical treatment on a medically intractable patient diagnosed with occipital lobe epilepsy after analyzing the patient's HFOs with IEEG using the original program. The patient has achieved seizure-free status one year after surgery. Our method of creating a brain surface topographic map of interictal HFOs and a topographic movie of ictal HFOs was useful for easy understanding of seizure onset zone and epileptic HFOs propagation. It may also be helpful for determining the necessary extent of surgical resection to include the epileptogenic zone, thus promoting better postsurgical seizure outcomes.
KW - High frequency oscillations
KW - Intracranial electroencephalography
KW - Neocortical epilepsy
KW - Respective surgery
KW - Topographic map
UR - http://www.scopus.com/inward/record.url?scp=84925047725&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84925047725&partnerID=8YFLogxK
M3 - Article
VL - 24
SP - 32
EP - 39
JO - Japanese Journal of Neurosurgery
JF - Japanese Journal of Neurosurgery
SN - 0917-950X
IS - 1
ER -