Sökning: "functional magnetic resonance imaging fMRI"

Visar resultat 21 - 25 av 95 avhandlingar innehållade orden functional magnetic resonance imaging fMRI.

1. 21. Functional neurobiology in normal aging, mild cognitive impairment and Alzheimer's disease : focus on on visuospatial processing using functional magnetic resonance imaging

   Författare :Patrizia Vannini; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :Alzheimer s disease; brain function; functional magnetic resonance imaging; mild cognitive impairment; normal aging; task demand; visuospatial processing;

   Sammanfattning : With the proportional increase of the aging population in the coming decades as well as a continuously augmenting life expectancy, the effects of neurodegeneration on brain function are a topic of increasing importance. Of special interest are tools that probe the functional consequences of neurodegenerative processes and possible compensatory mechanisms that might emerge. LÄS MER

3. 22. Structural and functional changes in the brain after surgically repaired median nerve injury

   Författare :Per F. Nordmark; Roland S. Johansson; Henrik Ehrsson; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Humans; Hand; Touch; Peripheral nerve injury; Magnetic resonance imaging; Somatosensory Cortex; Cortical plasticity; fysiologi; Physiology; handkirurgi; hand surgery;

   Sammanfattning : Despite the best available surgical repair, traumatic median nerve injury within the forearm typically causes lifelong impairment in hand function. This stems from an inadequate reinnervation of the nerves supporting sensory functions of the thumb, index and long finger, and of nerves supplying intrinsic hand muscles. LÄS MER

4. 23. Imaging Studies of Olfaction in Health and Parkinsonism

   Författare :Charalampos Georgiopoulos; Elna-Marie Larsson; Maria Engström; Nil Dizdar; Helene Zachrisson; Asta Kristine Håberg; Linköpings universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : Olfactory loss is a common non-motor symptom of Parkinson’s disease (PD), often preceding the cardinal motor symptoms of the disease. The aim of this thesis was to: (a) evaluate whether olfactory examination can increase diagnostic accuracy, and (b) study the structural and functional neural basis of olfactory dysfunction in PD with different applications of Magnetic Resonance Imaging (MRI). LÄS MER

5. 24. Brain Plasticity and Upper Limb Function After Stroke: Some Implications for Rehabilitation

   Författare :Påvel Lindberg; Jörgen Borg; Hans Forssberg; Margareta Engardt; Cornelius Weiller; Uppsala universitet; []
   Nyckelord :Neurosciences; Stroke; Upper Limb; Brain Plasticity; Functional MRI; Diffusion Tensor Imaging; Transcranial Magnetic Stimulation; Neurovetenskap;

   Sammanfattning : Neuroimaging and neurophysiology techniques were used to study some aspects of cortical sensory and motor system reorganisation in patients in the chronic phase after stroke. Using Diffusion Tensor Imaging, we found that the degree of white matter integrity of the corticofugal tracts (CFT) was positively related to grip strength. LÄS MER

7. 25. Imaging serotonin and dopamine transporters in social anxiety disorder : Characterization, treatment and expectancy effects

   Författare :Olof Hjorth; Tomas Furmark; Andreas Frick; Eduard Maron; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; PET; serotonin; dopamine; placebo; SSRI; CBT; MRI; Psychology; Psykologi; Psychiatry; Psykiatri; Radiology; Radiologi;

   Sammanfattning : The monoamines serotonin and dopamine are likely to be involved in the pathophysiology of social anxiety and other affective disorders, but their respective contributions and putative interactions in the causes and cures of these disorders are still not well understood. It is also largely unknown if and how expectations of treatment success affect brain neurochemistry and neural activations, and if expectations interact with antidepressants like selective serotonin reuptake inhibitors (SSRIs). LÄS MER