scholarly journals EXPERIENCE OF THE MANAGEMENT OF PATIENTS WITH ONCOGENIC EPILEPSIA

2017 ◽  
Vol 22 (6) ◽  
pp. 316-321
Author(s):  
Diana V. Dmitrenko ◽  
N. A Shnayder ◽  
Yu. A Dykhno ◽  
A. I Dmitrenko ◽  
I. G Strotskaya
Keyword(s):  
Primary Care Physicians ◽  
High Field ◽  
Focal Epilepsy ◽  
Epileptic Seizures ◽  
Time Interval ◽  
Common Symptom ◽  
Childbearing Age ◽  
High Field Mri ◽  
Postoperative Changes ◽  
The Brain

Epileptic seizures are a common symptom in brain tumor patients. The aim of the study: to investigate the features of oncogenic epilepsy in women of the fertile age. Material and methods. The study included 352 women aged of from 15 to 49 years, suffering from epilepsy. The examination consisted of an EEG and a high-field MRI investigation of the brain (1.5 Tc) with a scan interval of 1-2 mm. Results and discussion. Epilepsy against the background of volumetric brain formations was found in 15/139 (10.8%) patients with symptomatic focal epilepsy. The age of a debut of oncogenic epilepsy ranged from 2 to 38 years, the median was 14 years. Astrocytomas, found in 40% of cases, prevailed in the etiology of volumetric formations. A considerable time interval between the epileptic seizure debut and the high-field MRI examination was noted to result in the diagnosis of volumetric brain formation: median was 10.5 [2; 15] years. In the clinical picture of epilepsy there were dominated simple and complex focal seizures. Secondary-generalized tonic-clonic seizures were stopped in 60% of cases. The pharmacoinduced remission of oncogenic epilepsy was achieved in 3/15 (20%) cases. Conclusion. The low alertness of primary care physicians in terms of diagnosis of neuroncology in women of childbearing age was noted. The therapy of symptomatic oncogenic epilepsy was characterized by certain difficulties, caused by the growth of volume formation and/or gross cicatricial postoperative changes in the brain substance.

scholarly journals Comparison of T1wFLAIR and T1wTSE sequences in imaging the brain of small animals using high-field MRI

2019 ◽  
Vol 72 (1) ◽  
Author(s):  
Chiara Bergamino ◽  
Séamus Hoey ◽  
Kenneth Waller ◽  
Cliona Skelly
Keyword(s):  
High Field ◽  
Small Animals ◽  
High Field Mri ◽  
The Brain

Classification of seizures and epilepsy

2019 ◽  
pp. 935-944
Author(s):  
Andrew McEvoy ◽  
Tim Wehner ◽  
Victoria Wykes
Keyword(s):  
Focal Epilepsy ◽  
Focal Cortical Dysplasia ◽  
Hippocampal Sclerosis ◽  
Epileptic Seizures ◽  
Recurrence Risk ◽  
Medical Emergency ◽  
Unprovoked Seizure ◽  
Generalized Seizures ◽  
The Brain

Epileptic seizures are transient neurologic alterations due to abnormal excessive or synchronous neuronal cerebral activity. They may cause subjective symptoms (aura), and objective autonomic, behavioural, or cognitive alterations in any combination. Focal seizures are initially generated in one circumscribed area in the brain, whereas generalized seizures involve bihemispheric neuronal networks from the seizure onset. Epilepsy is a brain disease defined by the occurrence of two unprovoked seizures more than 24 h apart or one unprovoked seizure with underlying pathological or genetic factors resulting in a similar recurrence risk. Focal epilepsy syndromes are best classified by aetiology or anatomical area of origin. A seizure that does not self-terminate results in status epilepticus, and constitutes a medical emergency that requires immediate treatment. Focal cortical dysplasia and hippocampal sclerosis are the commonest aetiologies of epilepsy amenable to surgical treatment and are reviewed here. The limbic pathway may be involved in seizure propagation, and the anatomy is described.

scholarly journals Particularities in differential diagnostics of epileptogenic brain malformations on the low-field MRI-device

2019 ◽  
Vol 13 (4) ◽  
pp. 23-39
Author(s):  
V. S. Khalilov ◽  
A. A. Kholin ◽  
B. R. Bakaeva ◽  
M. Yu. Bobylova ◽  
Kh. Sh. Gazdieva
Keyword(s):  
High Field ◽  
Focal Epilepsy ◽  
Focal Cortical Dysplasia ◽  
Cortical Dysplasia ◽  
Differential Diagnostics ◽  
High Field Mri ◽  
Low Field ◽  
Brain Malformations ◽  
Low Field Mri

Background.It has been suggested that the part of the cryptogenic epilepsies is a consequence of minor-foci disorders of cortical architectonics, the diagnosis of which is not always possible due to the unavailability of MR-scanners with high magnetic induction.Objective:determination of the best options of the low-field MRI-device for visualization of epileptogenic brain malformations in children with symptomatic focal forms of epilepsy.Materials and methods.Were analyzed MRI data of 24 children undergoing investigations regarding for difficult-to-treat or pharmacoresistant forms of focal epilepsy in the Department of Magnetic-Resonance Tomography, Central Children Clinical Hospital of FMB Agency  of Russia at 2015–2017. All the patients underwent brain MRI according to standard routine protocol. Simultaneously we review conclusions of epileptologist and the preliminary video-electroencefalographic monitoring data for determination of the optimal imaging protocol for every specific form of epilepsy. For imaging of the epileptogenic brain lesion the MRI study was conducted on open-ended device “Aperto” (Hitachi Ltd., Japan) of static magnetic field with the tension characteristics of 0.4 T. The thickness of the slices and the scan step was performed  at 3.0 and 3.5 mm (the maximum value of slice thickness and step due to the technical conditions of the used scanner without losing in signalto-noise ratio) with the use of special positioning of slices in the coronal and axial projections, T2, T1, STIR, FLAIR weighted images perpendicular and parallel to the long axis of the hippocampus.Results and conclusion.In 24 patients were revealed structural brain changes that have neuroradiological signs of brain malformations. In all the patients this changes were associated with difficult to treat and drug-resistant forms of focal epilepsy. The newly identified malformations were observed in 10 patients, and in 3 cases the changes detected after previous MRI (including high-field MRI-devices) whose results were false-negative. In 11 patients diffuse brain abnormalities had been revealed, including the combinations of several hypogenesis and dysplastic pathologies. In 13 patients were marked different types of hemispheric and regional disorders of cortical development including focal cortical dysplasia. Extensive unilateral and bilateral changes were clearly distinguishable on the routine MRI. The low-tension technique approximated to the epileptic scanning protocol in some cases allowed to assess the affected area and revealed the combination of different variants of pathological cortical organization. In 7 cases the preliminary diagnosis based on the results of previous MRI studies including high-field MRI-devices. In 2 of these patients this changes were minor-focal, not visualized according to the routine MRI protocol, and had the differentiation characteristics between focal cortical dysplasia IIb/dysembryoplastic neuroepithelial tumor/ganglioglioma types. Disappointing results of visualization of mesial-basal temporal lobe regions aimed to detect small-caliber intracortical formations were observed. These patients contained a separate group of 12 children for whom extensive investigation which includes high-field MRI scan protocol on epileptic program was recommended.

scholarly journals The contribution of myelin to magnetic susceptibility-weighted contrasts in high-field MRI of the brain

NeuroImage ◽  
2012 ◽  
Vol 59 (4) ◽  
pp. 3967-3975 ◽  
Author(s):  
Jongho Lee ◽  
Karin Shmueli ◽  
Byeong-Teck Kang ◽  
Bing Yao ◽  
Masaki Fukunaga ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
High Field ◽  
High Field Mri ◽  
The Brain

Complexity Measures of Brain Electrophysiological Activity

2010 ◽  
Vol 24 (2) ◽  
pp. 131-135 ◽  
Author(s):  
Włodzimierz Klonowski ◽  
Pawel Stepien ◽  
Robert Stepien
Keyword(s):  
Brain Activity ◽  
Deterministic Chaos ◽  
Epileptic Seizures ◽  
Eeg Signal ◽  
Eeg Signals ◽  
Complexity Measures ◽  
Electrophysiological Activity ◽  
Signal Complexity ◽  
Physiological Sleep ◽  
The Brain

Over 20 years ago, Watt and Hameroff (1987 ) suggested that consciousness may be described as a manifestation of deterministic chaos in the brain/mind. To analyze EEG-signal complexity, we used Higuchi’s fractal dimension in time domain and symbolic analysis methods. Our results of analysis of EEG-signals under anesthesia, during physiological sleep, and during epileptic seizures lead to a conclusion similar to that of Watt and Hameroff: Brain activity, measured by complexity of the EEG-signal, diminishes (becomes less chaotic) when consciousness is being “switched off”. So, consciousness may be described as a manifestation of deterministic chaos in the brain/mind.

Resection Control in Trans-sphenoidal Surgery of Pituitary Macroadenoma by Intraoperative High-Field MRI

Skull Base ◽  
2005 ◽  
Vol 15 (S 2) ◽  
Author(s):  
Boris von Keller ◽  
R. Fahlbusch ◽  
O. Ganslandt ◽  
C. Nimsky
Keyword(s):  
High Field ◽  
Pituitary Macroadenoma ◽  
High Field Mri ◽  
Resection Control ◽  
In Trans

Automated System for Epileptic Seizures Prediction based on Multi-Channel Recordings of Electrical Brain Activity

2018 ◽  
pp. 115-122 ◽  
Author(s):  
V. A. Maksimenko ◽  
A. A. Harchenko ◽  
A. Lüttjohann
Keyword(s):  
Epileptic Seizure ◽  
Brain Activity ◽  
Epileptic Seizures ◽  
Automated System ◽  
Brain Computer Interfaces ◽  
Electrical Brain Activity ◽  
Computer Interfaces ◽  
Prediction And Prevention ◽  
The Brain

Introduction: Now the great interest in studying the brain activity based on detection of oscillatory patterns on the recorded data of electrical neuronal activity (electroencephalograms) is associated with the possibility of developing brain-computer interfaces. Braincomputer interfaces are based on the real-time detection of characteristic patterns on electroencephalograms and their transformation  into commands for controlling external devices. One of the important areas of the brain-computer interfaces application is the control of the pathological activity of the brain. This is in demand for epilepsy patients, who do not respond to drug treatment.Purpose: A technique for detecting the characteristic patterns of neural activity preceding the occurrence of epileptic seizures.Results:Using multi-channel electroencephalograms, we consider the dynamics of thalamo-cortical brain network, preceded the occurrence of an epileptic seizure. We have developed technique which allows to predict the occurrence of an epileptic seizure. The technique has been implemented in a brain-computer interface, which has been tested in-vivo on the animal model of absence epilepsy.Practical relevance:The results of our study demonstrate the possibility of epileptic seizures prediction based on multichannel electroencephalograms. The obtained results can be used in the development of neurointerfaces for the prediction and prevention of seizures of various types of epilepsy in humans. 

Sign in / Sign up

Export Citation Format

Share Document