Search for dissertations about: "fear"

Showing result 1 - 5 of 514 swedish dissertations containing the word fear.

  1. 1. Erasing Fear : Effect of Disrupting Fear Memory Reconsolidation on Central and Peripheral Nervous System Activity

    Author : Thomas Ågren; Mats Fredrikson; Tomas Furmark; Uppsala universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Memory reconsolidation; fear conditioning; serotonin; dopamine; polymorphism; gene; exposure therapy; fMRI; amygdala;

    Abstract : Fear memories, here defined as learned associations between a stimulus and a physiological fear reaction, are formed through fear conditioning. In animals, fear memories, present in the lateral amygdala, undergo reconsolidation after recall. READ MORE

  2. 2. Fear, Startle, and Fear-Potentiated Startle : Probing Emotion in the Human Brain

    Author : Anna Pissiota; Mats Fredrikson; Scott Rauch; Uppsala universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Psychology; anxiety; attention; brain; fear; fear-potentiated startle; human; neuroimaging; positron emission tomography; posttraumatic stress disorder; regional cerebral blood flow; startle; startle habituation; symptom provocation; Psykologi; Psychology; Psykologi; Psychology; psykologi;

    Abstract : The present thesis explored the neurobiological basis of three aspects of defense behaviors in humans. Positron emission tomography methodology was used, and changes in regional cerebral blood flow (rCBF) were measured as an index of neural activity. READ MORE

  3. 3. Guided by Fear : Effects on attention and awareness

    Author : Nathalie Peira; Stefan Wiens; Nazanin Derakhshan; Stockholms universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Emotion; fear; attention; awareness; affective processing; heart rate; skin conductance; Psychology; Psykologi; Psychology; psykologi;

    Abstract : Because the visual system has limited capacity, emotions such as fear may play an important role in guiding the selection of relevant input (LeDoux, 2000; Öhman & Mineka, 2001). The aim of the current thesis was to investigate how fear can guide the organism by influencing:  (I) attentional processes, (II) awareness of the visual input, and (III) affective processing independent of awareness. READ MORE

  4. 4. Diagnostic Aspects of Fear of Childbirth

    Author : Margareta Zar; Linköpings universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Fear of childbirth; W-DEQ; psychometrics; diagnostic test; anxiety; anxiety disorders; state fear; trait fear; delivery; mode of delivery; obsteric complications; riskfactor;

    Abstract : The first study presents the theoretical background of the Wijma Delivery Expectancy/Experience Questionnaire (W-DEQ) and an examination of this new instrument's construct validity and reliability. The W-DEQ has good reliability and measures the construct "fear of childbirth", when compared with other questionnaires. READ MORE

  5. 5. Serotonin in Fear and Anxiety

    Author : S Melker Hagsäter; Göteborgs universitet; []

    Abstract : That the neurotransmitter serotonin (5-HT) has a central role in fear and anxiety is supported by numerous experimental and clinical studies. Arguably the most illustrative example is the effect of serotonergic-acting drugs, and in particular the selective serotonin reuptake inhibitors (SSRIs), in the treatment of anxiety disorders. READ MORE