scholarly journals Widespread changes in network activity allow non-invasive detection of mesial temporal lobe seizures

Brain ◽  
2016 ◽  
Vol 139 (10) ◽  
pp. 2679-2693 ◽  
Author(s):  
Alice D. Lam ◽  
Rodrigo Zepeda ◽  
Andrew J. Cole ◽  
Sydney S. Cash
Keyword(s):  
Temporal Lobe ◽  
Network Activity ◽  
Non Invasive ◽  
Temporal Lobe Seizures ◽  
Mesial Temporal Lobe

scholarly journals SCOPE-mTL: A non-invasive tool for identifying and lateralizing mesial temporal lobe seizures prior to scalp EEG ictal onset

2017 ◽  
Vol 128 (9) ◽  
pp. 1647-1655 ◽  
Author(s):  
Alice D. Lam ◽  
Douglas Maus ◽  
Sahar F. Zafar ◽  
Andrew J. Cole ◽  
Sydney S. Cash
Keyword(s):  
Temporal Lobe ◽  
Non Invasive ◽  
Scalp Eeg ◽  
Temporal Lobe Seizures ◽  
Mesial Temporal Lobe

Failed epilepsy surgery for mesial temporal lobe sclerosis: a review of the pathophysiology

2012 ◽  
Vol 32 (3) ◽  
pp. E9 ◽  
Author(s):  
Fernando L. Vale ◽  
Glen Pollock ◽  
Selim R. Benbadis
Keyword(s):  
Systematic Review ◽  
Failure Rate ◽  
Temporal Lobe ◽  
Seizure Control ◽  
Mesial Temporal Sclerosis ◽  
Detailed Knowledge ◽  
Review Of The Literature ◽  
Temporal Lobe Seizures ◽  
Cause Of Failure ◽  
Mesial Temporal Lobe

Object The object of the current study was to review the electrophysiology and pathological substrate of failed temporal lobe surgery in patients with mesial temporal sclerosis. Methods A systematic review of the literature was performed for the years 1999–2010 to assess the cause of failure and to identify potential reoperation candidates. Results Repeat electroencephalographic evaluation documenting ipsilateral temporal lobe onset was the most frequent cause for recurrent epileptogenesis, followed by contralateral temporal lobe seizures. Less frequently, surgical failures demonstrated an electroencephalogram that was compatible with extratemporal localization. The generation of occult or new epileptogenic zones as well as residual epileptogenic tissue could explain these findings. Conclusions The outcome of temporal lobe surgery for epilepsy is challenged by a somewhat consistent failure rate. Reoperation results in improved seizure control in properly selected patients. A detailed knowledge of the pathophysiology is beneficial for the reevaluation of these patients.

Localization of Mesial Temporal Lobe Seizures With Sphenoidal Electrodes

1998 ◽  
Vol 15 (3) ◽  
pp. 256-261 ◽  
Author(s):  
Steven V. Pacia ◽  
Won J. Jung ◽  
Orrin Devinsky
Keyword(s):  
Temporal Lobe ◽  
Temporal Lobe Seizures ◽  
Mesial Temporal Lobe

Very slow EEG responses lateralize temporal lobe seizures: An evaluation of non-invasive DC-EEG

Neurology ◽  
2003 ◽  
Vol 60 (7) ◽  
pp. 1098-1104 ◽  
Author(s):  
S. Vanhatalo ◽  
M.D. Holmes ◽  
P. Tallgren ◽  
J. Voipio ◽  
K. Kaila ◽  
...  
Keyword(s):  
Temporal Lobe ◽  
Non Invasive ◽  
Temporal Lobe Seizures

An on demand macaque model of mesial temporal lobe seizures induced by unilateral intra hippocampal injection of penicillin

2018 ◽  
Vol 142 ◽  
pp. 20-28 ◽  
Author(s):  
Ariana Sherdil ◽  
Stéphan Chabardès ◽  
Isabelle Guillemain ◽  
Sandrine Michallat ◽  
Shivadatta Prabhu ◽  
...  
Keyword(s):  
Temporal Lobe ◽  
Macaque Model ◽  
On Demand ◽  
Temporal Lobe Seizures ◽  
Mesial Temporal Lobe

scholarly journals Early Ictal Recruitment of Midline Thalamus in Mesial Temporal Lobe Epilepsy

2019 ◽  
Author(s):  
Andrew Romeo ◽  
Alexandra T. Issa Roach ◽  
Emilia Toth ◽  
G. Chaitanya ◽  
Adeel Ilyas ◽  
...  
Keyword(s):  
Temporal Lobe Epilepsy ◽  
Evoked Potentials ◽  
Temporal Lobe ◽  
Opposite Direction ◽  
Mesial Temporal Lobe Epilepsy ◽  
Midline Thalamus ◽  
Temporal Lobe Seizures ◽  
Mesial Temporal Lobe ◽  
Stimulation Of

AbstractThe causal role of midline thalamus in the initiation and early organization of mesial temporal lobe seizures is studied. Three patients undergoing stereoelectroencephalography were enrolled for the placement of an additional depth electrode targeting the midline thalamus. The midline thalamus was recruited in all three patients at varying points of seizure initiation (0-13 seconds) and early propagation (9-60 seconds). Stimulation of either thalamus or hippocampus induced similar habitual seizures. Seizure-induced in the hippocampus rapidly recruited the thalamus. Evoked potentials demonstrated stronger connectivity from the hippocampus to the thalamus than in the opposite direction. The midline thalamus can be within the seizure initiation and symptomatogenic circuits.

scholarly journals The comparative study of invasive electroencephalography modalities in temporal lobe epilepsy

2021 ◽  
Vol 23 (3) ◽  
pp. 14-22
Author(s):  
V. M. Dzhafarov ◽  
A. B. Dmitriev ◽  
N. P. Denisova ◽  
D. A. Rzaev
Keyword(s):  
Temporal Lobe Epilepsy ◽  
Temporal Lobe ◽  
Focal Epilepsy ◽  
Epileptogenic Zone ◽  
Foramen Ovale ◽  
Seizure Onset ◽  
Depth Electrodes ◽  
Seizure Onset Zone ◽  
Temporal Lobe Seizures ◽  
Mesial Temporal Lobe

Introduction. Invasive video-EEG monitoring (invasive EEG) is indicated in patients with refractory focal epilepsy while localization of the epileptogenic zone is unclear. Methods of invasive EEG in different groups of patients demonstrate variable results.Objective: to analyse the results of invasive EEG via subdural and depth electrodes in patients with refractory temporal lobe epilepsy with mesial temporal lobe seizures.Materials and methods. The series of 37 patients who underwent invasive EEG from 2013 to 2020 was retrospectively analysed. The study includes primary adult patients with structural refractory focal epilepsy with mesial temporal lobe seizures without tumor and vascular pathology. Patients were divided onto 3 groups: 1) with foramen ovale electrodes 2) subdural strip electrodes and 3) combination of subdural strips and depths electrodes. The results of anteromedial temporal lobectomy after 6 months were classified according to Engel scale.Results. A group with foramen ovale electrodes included 7 patients, subdural strips – 23, combination – 7. The seizure onset zone was detected in 36 (97 %) cases. Serious complications were observed in 2 (29 %) cases in the group with foramen ovale electrodes. The mean follow-up in 23 (76 %) patients after resective surgery was 28.3 months. Favourable results (Engel I, II) were observed in 4 (80 %) patients with foramen ovale electrodes, in 8 (67 %) patients with subdural electrodes, in 6 (100 %) with combination. Unfavourable results (Engel III, IV) were noted in 1 (20 %) patient with foramen ovale electrode, in 4 (33 %) patients with subdural strips.Conclusion. All the presented modalities of invasive EEG are effective for localizing of seizure onset zone in this category of patients. Foramen ovale electrode using may be limited due to increased risk of complications.

Role of the Frontal Lobes in the Propagation of Mesial Temporal Lobe Seizures

Epilepsia ◽  
1991 ◽  
Vol 32 (6) ◽  
pp. 822-837 ◽  
Author(s):  
Jeffrey P. Lieb ◽  
Richard M. Dasheiff ◽  
Jerome Engel ◽  
(P. Genton ◽  
(P. Genton
Keyword(s):  
Temporal Lobe ◽  
Frontal Lobes ◽  
Temporal Lobe Seizures ◽  
Mesial Temporal Lobe
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