Search for dissertations about: "orbitofrontal cortex"

Showing result 1 - 5 of 21 swedish dissertations containing the words orbitofrontal cortex.

  2. 1. Emotion and Learning - A Computational Model of the Amygdala

    Author : Jan Morén; Kognitionsvetenskap; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Applied and experimental psychology; Sociologi; Sociology; orbitofrontal cortex; learning; hippocampus; emotions; computational models; mygdala; classical conditioning; Tillämpad och experimentell psykologi; Philosophy; Filosofi;

    Abstract : The amygdala is a small subcortical structure that has long been implicated in the conditioning of fear and other emotions. It is heavily interconnected to a number of both cortical and subcortical structures and is thus well placed to integrate sensory inputs from multiple areas to produce emotional reactions directly as well as influence learning and attention systems. READ MORE

  4. 2. Hedonic, neural, and autonomic responses to prolonged gentle touch

    Author : Chantal Triscoli; Göteborgs universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; long-lasting touch; CT afferents; pleasantness; liking; wanting; satiety; orbitofrontal cortex; reward; heart rate variability;

    Abstract : Physical contact among individuals, such as caressing and cuddling, is connoted by a strong emotional value, and is usually perceived as a pleasant and rewarding experience. C tactile (CT) afferents are a class of fibres that are specific channels for detecting touch at a caress-like veloc-ity (between 1 and 10 cm/s). READ MORE

  5. 3. Molecular Adaptations in the Endogenous Opioid System in Human and Rodent Brain

    Author : Muhammad Zubair Hussain; Georgy Bakalkin; Anita Hansson; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Endogenous Opioid System; Dynorphins; Lateralization; Alcohol Dependence; Emotions; Traumatic Brain Injury; Anterior Cingulate Cortex; Dorsal Striatum; Neuroscience; Neurovetenskap;

    Abstract : The aims of the thesis were to examine i) whether the endogenous opioid system (EOS) is lateralized in human brain areas involved in processing of emotions and pain; ii) whether EOS responses to unilateral brain injury depend on side of lesion, and iii) whether in human alcoholics, this system is involved in molecular adaptations in brain areas relevant for cognitive control of addictive behavior and habit formation.The main findings were that (1) opioid peptides but not opioid receptors and classic neurotransmitters are markedly lateralized in the anterior cingulate cortex involved in processing of  positive and negative emotions and affective component of pain. READ MORE

  6. 4. The aging frontal lobe in health and disease : a structural magnetic resonance imaging study

    Author : Olof Lindberg; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : Cortical and subcortical regions of the brain decrease in volume in normal as well as pathological aging. Previous studies indicate that certain parts of the brain, like the prefrontal cortex, may be particularly vulnerable to age-related processes which are manifested by significant volume loss in this region. READ MORE

  7. 5. Imaging fear and anxiety in the human brain : Positron emission tomographic studies

    Author : Håkan Fischer; Uppsala universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Psychology; fear; anxiety; panic; conditioning; human; brain; neuroimaging; positron emissiontomography; PET; Psykologi; Psychology; Psykologi; Psychology; psykologi;

    Abstract : Fear and anxiety are central human experiences. However, the relation between aspects of these aversive emotional states and brain function have previously been studied mostly in animals. READ MORE