Sökning: "regional blood flow"

Visar resultat 21 - 25 av 106 avhandlingar innehållade orden regional blood flow.

  1. 21. Social Phobia : The Family and the Brain

    Författare :Maria Tillfors; Christer Allgulander; Uppsala universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Psychology; Anticipation; anxiety; avoidant personality disorder; family history; fear; neuroimaging; positron emission tomography; regional cerebral blood flow; social phobia; symptom provocation; Psykologi; Psychology; Psykologi; Psychology; psykologi;

    Sammanfattning : The present thesis investigated family history and neurobiology of social phobia. Social phobia is a disabling disorder characterized by a marked fear of scrutiny in a variety of social situations. LÄS MER

  3. 22. Aspects of Frontal and Medial Temporal Brain Functions : Neuropsychological and functional imaging studies in normals and in frontotemporal dementia

    Författare :Christina Elfgren; Institutionen för psykologi; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; neurophysiology; regional cerebral blood flow; Neuropsychological assessment; frontotemporal dementia; normal subjects; frontal lobes; medial temporal lobes; neuropsychology; Neurology; Neurologi; neuropsykologi; neurofysiologi;

    Sammanfattning : The thesis is based on five investigations. In the first study the nature and the degree of cognitive impairment of patients with frontotemporal dementia (FTD) is explored. The results from neuropsychological assessment are described as three levels of cognitive impairment. LÄS MER

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

    Författare :Anna Pissiota; Mats Fredrikson; Scott Rauch; Uppsala universitet; []
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

  5. 24. Positron Emission Tomography (PET) Studies in Anxiety Disorders

    Författare :Åsa Michelgård Palmquist; Mats Fredrikson; Lars von Knorring; Hans Ågren; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Positron emission tomography; PET; amygdala; fear; anxiety; anxiety disorders; specific phobia; social phobia; posttraumatic stress disorder; PTSD; regional cerebral blood flow; rCBF; substance P; SP; neurokinin 1 receptor; NK1; GR205171; STAI-S; Psychiatry; Psykiatri; Neurobiology; Neurobiologi; Neuroscience; Neurovetenskap; Experimental brain research; Experimentell hjärnforskning; Molecular neurobiology; Molekylär neurobiologi; Radiation biology; Strålningsbiologi; Neurobiology; Neurobiologi; Neurobiology; Neurobiologi;

    Sammanfattning : Anxiety disorders are very common and the primary feature is abnormal or inappropriate anxiety. Fear and anxiety is often mediated by the amygdala, a brain structure rich in substance P (SP) and neurokinin 1 (NK1) receptors. LÄS MER

  7. 25. Variations in Functional Lateralization

    Författare :Peter E Wendt; Institutionen för psykologi; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; posterior association cortex; prefrontal; DLPFC; regional cerebral blood flow; normal subjects; lateralization; asymmetry; performance; creativity; Neurology; neuropsychology; neurophysiology; cognitive; ethanol; activation; visual stimulation; functional; verbal; divergent; spatial; Neurologi; neurofysiologi; neuropsykologi;

    Sammanfattning : The general aim of this thesis was to study asymmetric activation of the neocortex in normal subjects, using the rCBF technique and different cognitive tasks. The aim was also to study individual and group variations of asymmetric activation, as well as factors pertaining to these variations. The thesis is based on four investigations. LÄS MER