National Repository of Grey Literature 7 records found  Search took 0.01 seconds. 
Subjective and psychophysiological parametres of emotions elicited by various animal taxa
Peterková, Šárka ; Landová, Eva (advisor) ; Čmejla, Roman (referee) ; Španiel, Filip (referee)
SUBJEKTIVNÍ A PSYCHOFYZIOLOGICKÉ PARAMETRY EMOCÍ, KTERÉ VZBUZUJÍ RŮZNÉ SKUPINY ZVÍŘAT Mgr. Šárka Peterková Abstract The central theme of this dissertation is human evaluation of animals from the perspective of subjectively experienced emotions and their psychophysiological correlates. It deals mainly with the emotion of disgust and its connection with aesthetic evaluation and perception of animal beauty, and, on the other hand, with another negative emotion, fear. It also aims to assess the findings from an evolutionary perspective and to understand the role of emotions evoked by animals in present times. It contains a total of six papers that were part of broader scientific projects, each of which addresses the subject from a slightly different angle. The first paper is a review dealing with negative emotions evoked by animals and is thus part of the theoretical introduction to this dissertation. It provides an overview of the subjective evaluation of animals according to fear and disgust, places the role of negative emotions in an evolutionary context, and finally analyses specific morphological features of representatives of different taxa that influence human perception. The second article details the assessment of emotions evoked by amphibians. In this case, the degree of perceived disgust is so...
Analysis of high-frequency activity in electroencephalogram of animal epilepsy model
Havel, T. ; Kudláček, J. ; Jiruška, Přemysl ; Ježdík, P. ; Čmejla, R.
High frequency oscillations (HFO) are believed to be a new specific biomarker of epileptogenic tissue. According to the reported findings, we hypothesized that HFOs occur more specific to the epileptogenic tissue. To test this hypothesis, we analyzed intracranial electroencephalograms (iEEG) of three subjects of animal epilepsy model. Overall 180 minutes of iEEG records were processed by the automatic high frequency activity detector and further analyzed. The dominant frequency of each segment was determined and categorized as ripples (80-200 Hz) or fast ripples (200-1000 Hz). Even though overall number of HFO detections predominate in the hemisphere where epileptic focus is located, in comparison of each brain structure separately our hypothesis cannot be fully confirmed.
Case study of intracranial EEG records of patients with focal cortical dysplasia type I and II
Balach, J. ; Ježdík, P. ; Čmejla, R. ; Kršek, P. ; Jiruška, Přemysl
In this study we try to find out if it is possible to differentiate type of focal cortical dysplasia by features obtained from intracranial EEG. We compare occurrence and rates of three biomarkers present in epilepsy in patients with focal cortical dysplasia type I and II. Case study is made on long term night records of 6 pediatric patients. Detection of interictal epileptiform discharges and high-frequency oscillations is made by automated algorithms, delta brush are marked visually. Position of lesion and electrodes inside were obtained from MRI. In individual rates were not found difference on significant level. No major significance were found, but as promising seem to be ratio inside to outside rates of high-frequency oscillations and presence of delta brush, which were found only in patients with focal cortical dysplasia type II.
Design of multichannel electrode for long-term recording of neocortical activity in vivo
Vlk, Pavel ; Kudláček, Jan ; Ježdík, P. ; Otáhal, Jakub ; Demeterová, Ľubica ; Čmejla, R. ; Jiruška, Přemysl
The main aim of this work was to develop new multichannel electrodes for long-term monitoring of neocortical aktivity in vivo in freely moving animals. Designed electrode implant is fabricated using 3D printing technique. We have designed efficient technique of cleaning, implant assembling and surgical implantation
Identification of epileptogenic neocortical areas by analysis of spatial distribution of interictal discharges
Janča, R. ; Kršek, P. ; Ježdík, P. ; Čmejla, R. ; Tomášek, M. ; Elišák, M. ; Jefferys, J. G. R. ; Jahodová, A. ; Komárek, V. ; Marusič, P. ; Jiruška, Přemysl
Algorithm utilizing principal component analysis was developed to analyze spatial distribution of interictal epileptiform discharges. This technique enables to seaprate interictal discharges into functionally significant clusters. Cluster properties can be used to identify epileptogenic components of the irritative zone
Functional mapping and excitability testing of limbic structures in vivo
Kudláček, Jan ; Levčík, David ; Vlk, Pavel ; Demeterová, Ľubica ; Otáhal, Jakub ; Čmejla, R. ; Jiruška, Přemysl
We have focused on analysis of functional connectivity and excitability testing of limbic structures in vivo. Results demonstrated that stimulation of ventral commisure activates preferentially dorsal hippocampus and medial entorhinal cortex
Vlk, Pavel ; Janča, R. ; Čmejla, R. ; Kršek, P. ; Marusič, P. ; Jiruška, Přemysl
To improve the localizing yield of interictal discharges, identification of specific features of the discharges generated only within epileptogenic region is required. We have developed self-clustering algorithm which discriminates distinct populations of interictal epileptiform discharges according to the morphology of their waveforms. Results demonstrate the ability of the algorithm to separate interictal epileptiform discharges according to their morphological features

Interested in being notified about new results for this query?
Subscribe to the RSS feed.