Search for dissertations about: "Hjärnan"

Showing result 1 - 5 of 335 swedish dissertations containing the word Hjärnan.

  2. 1. Telomeres and the brain : an investigation into the relationships of leukocyte telomere length with functional and structural attributes of the brain

    Author : Mikael Wikgren; Karl-Fredrik Norrback; Rolf Adolfsson; Göran Roos; Thomas Karlsson; Brenda Penninx; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; APOE; aging; atrophy; brain; cognition; cortisol; depression; hippocampus; HPA axis; MRI; stress; telomere length; white matter hyper-intensities.;

    Abstract : Telomeres are the outermost parts of linear chromosomes. They consist of tandemly repeated non-coding short nucleotide sequences (TTAGGG in all vertebrates), in humans spanning over the last 2 to 15 kilobase pairs of the chromosome. Due to the end-replication problem, telomeres shorten with each cellular division. READ MORE

  4. 2. Train your brain : updating, transfer, and neural changes

    Author : Erika Dahlin; Lars Nyberg; Anna Stigsdotter Neely; Torkel Klingberg; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; cognitive training; executive functioning; transfer; fMRI; brain system; young adults; elderly; practice; neural correlates; individual differences; Experimental brain research; Experimentell hjärnforskning; Cognitive science; Kognitionsforskning; fysiologi; Physiology;

    Abstract : An initial aim of this thesis was to determine whether training of a specific executive function (updating) produces improvements in performance on trained and transfer tasks, and whether the effects are maintained over time. Neural systems underlying training and transfer effects were also investigated and one question considered is whether transfer depends on general or specific neural overlap between training and transfer tasks. READ MORE

  5. 3. Restructuring the socially anxious brain : Using magnetic resonance imaging to advance our understanding of effective cognitive behaviour therapy for social anxiety disorder

    Author : Kristoffer N. T. Månsson; Gerhard Andersson; Tomas Furmark; Per Carlbring; C-J Boraxbekk; Philippe Goldin; Linköpings universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Social anxiety disorder SAD ; Cognitive behaviour therapy CBT ; Amygdala; Multimodal neuroimaging; Support vector machine learning SVM ; Social ångest; Kognitiv beteendeterapi; Hjärnavbildning; Amygdala; Magnetresonanstomografi;

    Abstract : Social anxiety disorder (SAD) is a common psychiatric disorder associated with considerable suffering. Cognitive behaviour therapy (CBT) has been shown to be effective but a significant proportion does not respond or relapses, stressing the need of augmenting treatment. READ MORE

  6. 4. Temporal dynamics of brain plasticity : characterizing brain structural changes during skill acquisition

    Author : Tomás Mediavilla; Daniel Marcellino; Alexandra Badea; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Motor learning; brain plasticity; structural plasticity; magnetic resonance imaging; voxel-based morphometry; tractography; connectivity; motor cortex; posterior parietal cortex; cerebellum; vesicular glutamate transporter;

    Abstract : Traditionally, structural plasticity in the human brain has been considered to follow a linear or asymptotic increase over the course of training. However, recent studies using structural MRI revealed transient increases in grey matter volume (GMV) with learning. READ MORE

  7. 5. Cognitive function, quality of life and functional brain networks : before and after glioma surgery

    Author : Mattias Stålnacke; Rickard L. Sjöberg; Tommy Bergenheim; Johan Eriksson; Kenneth Hugdahl; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Glioma; Neuropsychology; Neurosurgery; Quality of life; Supplementary Motor Area; Primary motor area. rsfMRI; fMRI; neurokirurgi; Neurosurgery; Oncology; onkologi;

    Abstract : The aim of this thesis was to investigate how cognitive function and quality of life are affected by glioma surgery in the supplementary motor area (SMA) and the lower primary motor cortex (M1), as well as to explore possible changes in functional network connectivity after surgery in the SMA.Sixteen patients subject to resective neurosurgical procedures due to gliomas in either the SMA or the M1 were studied. READ MORE