National Repository of Grey Literature 123 records found  1 - 10nextend  jump to record: Search took 0.03 seconds. 
Investigating very high-frequency oscillations phenomena in human brain
Kolajová, Martina ; Cimbálník, Jan (referee) ; Klimeš, Petr (advisor)
Identifikace zóny vzniku záchvatu (SOZ) – oblasti mozku, kde začínají záchvaty – je klíčová pro úspěch chirurgické resekce epileptického ložiska. Význam vysokých vysokofrekvenčních oscilací (VHFO) spočívá v jejich roli jako více specifického biomarkeru této nemoci, přestože mechanismus jejich vzniku zůstává nejasný. Jednotlivé neurony nejsou fyziologicky schopné generovat oscilace v rozsahu VHFO. Je proto předpokládáno, že VHFO zaznamenané makroelektrodami mohou vznikat sumací aktivity různých neuronálních skupin, které pálí asynchronně. Tato diplomová práce se věnuje analýze jevů VHFO s důrazem na jejich vztah k epilepsii. Pomocí metod s využitím měření na mikroelektrodovém poli (MEA) jsou zkoumány mechanismy vzniku VHFO prostřednictvím analýzy dat v programovacím jazyce Python.
Graph Neural Networks in Epilepsy Surgery
Hrtoňová, Valentina ; MSc, Daniel Uher, (referee) ; Filipenská, Marina (advisor)
Úspěch epileptochirurgického zákroku závisí na přesné lokalizaci epileptogenní zóny (EZ), avšak pouze 60% pacientů je po operaci bez záchvatů, což je často způsobeno nepřesnou identifikací EZ. Tato práce představuje novou metodu lokalizace EZ využívající grafové neuronové sítě (GNN) k analýze interiktálních biomarkerů - konkrétně interiktálních spiků a relativní entropie. Modely GNN byly využity pro lokalizaci kontaktů elektrod v resekované zóně vzniku záchvatu na základě dat z interiktální stereoelektroencefalografie a validovány na souboru klinických dat 37 pacientů ze dvou institucí. Nejlépe hodnocený model GNN - Graph Attention Network - dosáhl mediánu Area Under the Receiver Operating Characteristic (AUROC) 0,971 a mediánu Area Under the Precision-Recall Curve (AUPRC) 0,525 v souboru 19 pacientů s dobrým pooperačním výsledkem, přičemž v obou metrikách statisticky významně překonal referenční model založený na četnosti spiků (Wilcoxon Signed Rank test, p
My new room-mate: The Epilepsy+
Mívaltová, Markéta ; Veit, Jakub (referee) ; Mléčka, Jan (advisor)
Each of us has been dealt different cards in life. Some better, some worse. Some rich, some poor. Some healthier, some less so. Some happier, some less so. Each of us faces different challenges and opportunities. But that's life; no person in the world gets the same cards. However, in the end, it doesn't matter whether you drew an ace or not. It doesn't matter what cards you were dealt, but how you handle them. It matters whether you exchange them for others and better ones, or whether you keep them until the end of your life. Life is like a game, and nobody knows how it will turn out. Some are better players, others worse. But what if you draw a card with epilepsy? Could you still play a quality game with this card? How much will it affect your life? Undoubtedly, it will impact life much more than anyone who hasn't experienced something similar can imagine. Epilepsy is a chronic condition that means living with constant uncertainty. Uncertainty about when and where a seizure will strike. Uncertainty about how others will react to you. Uncertainty about how to cope with physical and psychological consequences. People with epilepsy often feel lonely, misunderstood, or rejected. However, housing is just as crucial for them as it is for anyone else. Because it's a space where they seek refuge and safety. A space where they should have the opportunity to live fully and with dignity. Unfortunately, many of them don't have the option to choose suitable housing that would meet their specific needs and financial means. So, how to design housing for people with epilepsy that would enable them to live contentedly and happily? This work attempts to find an answer to this question. The goal is to explore the relationship between epilepsy and spatial organization and to propose various typologies of housing that would respect the individual needs and preferences of this group of people. The work also utilizes modern technologies that can help improve the daily functioning of people with epilepsy, while also providing them with greater independence and control over their lives. The aim of the work is to show that people with epilepsy also have the right to quality housing that would help them realize their dreams and goals. To help them play their life game a little easier with an additional card. The theoretical part of the project, besides the disease itself, also addressed possible connections with the positive or negative effects of the surrounding environment on epileptics. Considerations were given to factors such as the impact of color, materials, sound, smell, temperature, as well as the safety of the space, which is undoubtedly a primary requirement in design. Following the theoretical research part of this project, I decided to propose suitable housing for epileptics in the practical part, adapted to their specific needs, both spatially and, for example, in the associated functions of the building, while still meeting the requirements of full-fledged urban living. The primary function in the design will be housing, to which additional functions will logically be added, such as accessible healthcare or leisure activities for residents.
Cortical-subcortical interactions in EEG data of patients with pharmacoresistant epilepsy
Šíma, Jan ; Králík, Martin (referee) ; Lamoš, Martin (advisor)
This bachelor's thesis deals with the elaboration of a literature search on epilepsy and electroencephalography signals with a focus on patients with drug-resistant epilepsy and the analysis of cortico-subcortical relationships. The theoretical part describes the chapters of epilepsy, electroencephalography, the possibility of pre-processing EEG data and analytical methods, which describe the cortico-subcortical interactions. The practical part contains pre-processing of EEG data, analysis of methods used, data analysis, results, discussion, and conclusion. The data analysis itself is performed by the Phase-amplitude coupling method. The discussion discusses the results, limitations, and other possible connections. The conclusion summarizes the whole bachelor thesis.
Acoustic analysis of Mozart effect and its effect in patients with epilepsy
Zemánek, Václav ; Mekyska, Jiří (referee) ; Kiska, Tomáš (advisor)
The music, in generaly, can calm down a human internally. The effect of Mozart’s music can even be measured. Students, who listened Mozart’s music, had higher IQ result and epileptiform activity is describing on patients with epilepsy. This master’s thesis is dealing with design of the evaluation system, which can determine music parameters describing epileptiform activity. In the solution is make detailed analysis of the tracks, signal parameterization, description of data processing and make the Pearson correlation analysis. In the final chapter are described music parameters, which suppress epileptiform activity in the women and the man.
Analysis of high frequency oscillations and connectivity in electrophysiology of the brain
Kozlovská, Magda ; Ronzhina, Marina (referee) ; Kolářová, Jana (advisor)
This study is focused on methods of analysis of high frequency oscillations (HFOs) and connectivity in invasive electrophysiology of the brain, comparing the effectiveness of these methods. The aim of the study is to find correlation between HFO and connectivity data and to determine the optimal way of localizing epilepileptic tissue to help pacients undergoing surgery to get rid of epilepsy completely.
Analysis of epileptogenic tissue response to intracranial electrical stimulation
Formánková, Zuzana ; Klimeš, Petr (referee) ; Cimbálník, Jan (advisor)
This work deals with the methods of intracranial electrical stimulation and their usage in the localization of epileptogenic tissue. The aim of the thesis is to assess, with help of the proposed markers, the reaction of pathological tissue on the electrical stimulation. Among the suitable markers high-frequency oscillations were classified, interictal spikes, changes in the connectivity, and the signal power within the frequency zones. The markers were detected on the iEEG records taken at the Fakultní nemocnice u sv. Anny in Brno. A software in the Python language has been designed for the purpose of analysis and detection; the software uses the detection algorithms of the EPYCOM library. In the final part of the thesis, the occurrence of the markers was analyzed in terms of dependency on the electrical stimulation. The influence of the electrical stimulation on the iEEG records of patients with epilepsy has been proved.
Detection of High-Frequency EEG Activity in Epileptic Patients
Cimbálník, Jan ; Kremláček, Jan (referee) ; Jiruška,, Přemysl (referee) ; Jurák, Pavel (advisor)
Tato práce se zabývá automatickou detekcí vysokofrekvenčních oscilací jakožto moderního elektrofyziologického biomarkru epileptogenní tkáně v intrakraniálním EEG, jehož vizuální detekce je zdlouhavý proces, který je ovlivněn subjektivitou hodnotitele. Epilepsie je jedním z nejčastějších neurologických onemocnění postihující 1 % obyvatelstva. Přestože jsou přibližně dvě třetiny případů léčitelné farmakologicky, zbylá třetina pacientů je odkázána zejména na léčbu chirurgickým zákrokem, pro nějž je zapotřebí přesně lokalizovat ložisko patologické tkáně. Vysokofrekvenční oscilace jsou v posledním desetiletí studovány pro jejich potenciál lokalizace patologické tkáně. Součástí této práce je shrnutí dosavadního výzkumu vysokofrekvenčních oscilací a výčet detektorů používaných ve výzkumu. V rámci práce byly vyvinuty či vylepšeny tři detektory vysokofrekvenčních oscilací, na jejichž popis navazuje evaluace z hlediska shody s manuální detekcí, přesnosti výpočtu příznaků oscilací a schopnosti lokalizace patologické tkáně. V závěru práce jsou představeny vyvinuté metody vizualizace vysokofrekvenčních výskytu oscilací a stručně uvedeny dosažené vědecké výsledky.
Acoustic analysis of Mozart effect and its effect in patients with epilepsy
Zemánek, Václav ; Mekyska, Jiří (referee) ; Kiska, Tomáš (advisor)
The music, in generaly, can calm down a human internally. The effect of Mozart's music can even be measured. Students, who listened Mozart's music, had higher IQ result and epileptiform activity is describing on patients with epilepsy. This master's thesis is dealing with design of the evaluation system, which can determine music parameters describing epileptiform activity.

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