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Non-pharmacological methods for influencing memory consolidation during sleep
Němcová, Monika ; Kopřivová, Jana (advisor) ; Honc, Ondřej (referee)
Sleep plays vital role in many physiological processes of the human body, including the consolidation of memory. The beneficial effects of sleep on memory consolidation have long been known, but only in the last two decades the knowledge of the relationship between sleep and memory has been used to develop interventions to improve memory consolidation during sleep. Two of these approaches are the focus of this work: closed-loop auditory stimulation (CLAS) and targeted memory reactivation (TMR). They are of particular clinical interest, as they are non- pharmacological, which minimizes the risk of dependence and abuse. In addition, they do not impose exogenous force fields on the brain and are, therefore, considered safer than other similar interventions. The aim of this work is to describe CLAS and TMR in detail, to investigate which factors influence their efficacy, and to discuss their clinical potential in the treatment of memory- related disorders.
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The effect of psychedelics on sleep
Šachová, Pavla ; Kopřivová, Jana (advisor) ; Spišská, Veronika (referee)
Recently, psychedelic drugs gain attention thanks to their potential to cure depressive disorders, anxious states or addiction. They are not causing addiction, they are not toxic and they trigger neuroplastic changes in tens of minutes or hours, which are essential for therapeutic purposes and positively correlates with an onset of antidepressant effect. Neuroplastic changes are simultaneously the connecting link between psychedelic state and sleep. In sleep the higher rate of neuroplasticity is markable during slow-wave sleep (SWS), which duration is getting shorter in patients with mental illness. The marker o neuroplasticity is slow-wave activity (SWA), which is getting higher not only in SWS, but also after intoxication with psychedelics or after long-time using of antidepressants. So the effect of psychedelics on sleep can be described as positive and inciting its therapeutical potential. The thesis is focused on ketamine which is the most recent one as for the topic of neuroplasticity and sleep.
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Animal models of obsessive-compulsive disorder
Radostová, Dominika ; Stuchlík, Aleš (advisor) ; Kopřivová, Jana (referee)
Obsessive compulsive disorder (OCD) is a widespread chronic psychiatric disorder, presenting itself with a wide range of symptoms. The heterogenity of OCD manifestations hinders the resarch and the interpretation of acquired results. Clinical studies are complemented by new insights collected from studies of animal models of OCD, which are nowdays integral to the resarch of OCD. During the course of the resarch many genetic, behavioral and pharmacologic animal models were developed. Number of works were not worked on further, however some models had been studied for a long time. Evaluation of individual models is dependant on many factors, and therefore the degree of validity and suitability for resarch differs between them. Powered by TCPDF (www.tcpdf.org)
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Vliv klomipraminu a risperidonu na učení a flexibilitu u animálního modelu obsedantně kompulzivní poruchy
Radostová, Dominika ; Stuchlík, Aleš (advisor) ; Kopřivová, Jana (referee)
Chronic sensitization of dopamine D2/D3 receptors by agonist quinpirole (QNP) induces compulsive checking behaviour in rats, which is considered an animal model of obsessive-compulsive disorder (OCD). Previous study revealed deficit in cognitive flexibility in QNP sensitized rats. This thesis focused on determining if this cognitive flexibility deficit is ameliorated by co-administration of clomipramine (CMI), risperidone (RIS) or combination of both (CMI+RIS) to QNP treatment. Aversively motivated active place avoidance task on a Carousel maze with reversal was used. The number of entrances into a to-be-avoided shock sector was evaluated as measure of performance. Six treatment groups were used: control group, QNP group, CMI group, QNP/CMI combination, QNP/RIS combination and QNP/CMI/RIS combination. Surprisingly, when compared alone, significantly worse acquisition was observed for QNP group compared to control group. However, similarly to previous study, QNP group had a worse performance in a first reversal session compared to control group. When all groups were compared, only QNP/CMI group had worse initial learning compared to control group. In reversal learning, only QNP treated group had a significantly more entrances than control group in first reversal session. Results suggest that co-treatment...
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Headline - comparison of headlines in tabloid and serious press and their internet version
Kopřivová, Jana ; Chejnová, Pavla (advisor) ; Holanová, Radka (referee)
The aim of this study was trace the general tendence in the produce of headlines in the tabloid and serious press and their internet versions. The basis for this work was a sample of twelve newspaper headlines that came out in January and February 2013. There were drawn following conclusions on the basis of stylistic and pragmatic analysis and comparison of these titles. Analyzed subtitles are different designs and used language tools. The tabloid media is trying to attract potential readers, especially graphic design titles, while serious media put more accent on the content of the title message. The tabloid headlines have characteristic color caps and overhang headling to other cell components. Headlines of serious media are printed in black and stands on the site separately. One of the differences between tabloid headlines and serious media is their length - tabloid usually decide for shortes ones than the serious media. Basis subtitles should form a neutral literary language, yet there are presented present colloquial expressions in the headlines of tabloids and media. Tabloid headlines include expressive sign unlike the serious media headlines. Statements in the headlines are assertive and have interrogative and directive use. The tabloid media uses interrogative function in headlins more than the...
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Acoustic stimulation of Slow wave sleep and its influence on consolidation of declarative memory in insomnia
Orendáčová, Mária ; Kopřivová, Jana (advisor) ; Kelemen, Eduard (referee)
Slow-wave sleep plays an important role in consolidation of declarative memory. From electrophysiological point of view, this process is dependent on a common occurrence and mutual integration of neocortical slow oscillations (< 1 Hz), hippocampal sharp-wave ripples (150-250 Hz) and thalamo-cortical sleep spindles (10-15 Hz). Previous studies demonstrated that periodic acoustic stimulation by pink noise pulses applied at frequency of sleep slow oscillation during slow wave sleep leads to prolongation of slow wave sleep and to enhancement in declarative memory performance in normal sleepers. Our study investigated this kind of periodic acoustic stimulation in its relation to sleep architecture and declarative memory of people suffering from insomnia due to which there often comes to a reduction in slow wave sleep which positively correlates with worsening of declarative memory performance. Our aim was to investigate if this kind of comparatively non-invasive brain stimulation has a potential to increase a total length of slow wave sleep and enhance declarative memory performance in insomnia. Our study revealed acoustic stimulation neither improved declarative memory performance nor it increased total length of slow-wave sleep. No positive association was found between level of declarative memory...
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Blue light spectrum and its effects on selected aspects of human sleep and cognition
Šmotek, Michal ; Kopřivová, Jana (advisor) ; Rokyta, Richard (referee) ; Maierová, Lenka (referee)
Background: Since the discovery of ipRGCs (intrinsic photosensitive retinal ganglion cells) in the retina, new research possibilities for studying the effects of light on the regulation of various behavioral and physiological functions that are independent of image formation arose. As ipRGCs are most sensitive to light of short wavelengths (460-480nm), this dissertation focuses on current topics related to the use of blue light, emphasizing its influence on circadian rhythms, sleep and cognitive performance and possible applications in clinical and non-clinical settings. Aims: The first study aimed to explore the effects of 20 minutes of narrow-bandwidth light exposure of different wavelengths on various neuropsychological and neurophysiological parameters of vigilance in healthy volunteers. The objective of the second study was to assess the effect of combining CBT-I (cognitive-behavioral therapy for insomnia) with wearing blue-light blocking glasses 90 minutes before bedtime on subjective and objective sleep parameters and daily symptoms (anxiety, depression, hyperarousal). The third study aimed to examine subjective sleep quality in a population of healthy volunteers and its association with evening and night light exposure to screens of media devices. Methods: In the first study, twelve healthy...
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Functional-imaging and electrophysiological correlates of obsessive-compulsive disorder and their potential use in neurofeedback intervention
Kopřivová, Jana ; Horáček, Jiří (advisor) ; Papežová, Hana (referee) ; Stuchlík, Aleš (referee)
Background: Obsessive-compulsive disorder (OCD) is a common mental disorder that may seriously affect quality of life and even the ability to work. Despite advanced medical care there are still patients who do not respond or do not respond sufficiently to treatment. Recently proposed treatment strategies such as deep brain stimulation or repetitive transcranial magnetic stimulation have targeted several levels of fronto-striatal circuits which dysfunction underlies OCD pathophysiology. Likewise, neurofeedback (NFB) could target dysfunctional fronto-striatal networks by providing almost real- time feedback about their activity. As the success of these methods critically depends on good knowledge of dysfunctional loops in OCD, a more detailed investigation of neurobiological basis of this disorder is highly needed. Aims: The aim of the first part of this dissertation was to provide an overview of the current literature related to OCD and NFB. The second section of the thesis is based on five original studies of the author that were conceived to 1) explore anatomical correlate of OCD in our patients, 2) to verify its functional relevance and specificity in electroencephalographic (EEG) studies, and 3) to test the utility of the findings in NFB treatment of OCD. Methods: In our studies we included...
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