Sökning: "Hjärnans"

Visar resultat 1 - 5 av 139 avhandlingar innehållade ordet Hjärnans.

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

    Författare :Tomás Mediavilla; Daniel Marcellino; Alexandra Badea; Umeå universitet; []
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

  3. 2. Aerobic fitness and healthy brain aging : cognition, brain structure, and dopamine

    Författare :Lars Jonasson; Carl-Johan Boraxbekk; Katrine Riklund; Emrah Düzel; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Aerobic exercise; VO2; working memory; executive function; freesurfer; striatum; dopamine; D2-receptors; [11C]raclopride;

    Sammanfattning : Background: Performing aerobic exercise and maintaining high levels of aerobic fitness may have positive effects on both brain structure and function in older adults. Despite decades of research however, there is still a rather poor understanding of the neurocognitive mechanisms explaining the positive effects of aerobic exercise on cognition. LÄS MER

  4. 3. Om vikten av att i automationsprocessen integrera handens och hjärnans arbete

    Författare :Bertil Gustafsson; Chalmers tekniska högskola; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Tacit knowledge; Small scale production; Operator´s computer; Cross-functional work teams; Robot arc welding; Decentralised work organisation;

    Sammanfattning : This licentiate report attempts to add to our knowledge of how the competence of skilled workers can be incorporated into modern manufacturing systems, without depriving them of the status that they had earned through their previous specialised skills and knowledge. The work is concentrated on establishing a theoretical basis for a model of how the computer can support this work: the Operator's Computer approach has been applied in three case-studies, thus taking it over the threshold into the Swedish engineering industry. LÄS MER

  5. 4. Information Processing in the Nervous System. On a Holistic Functional Organization Principle

    Författare :Jonas Enander; Hjärnans sensorimotoriska funktioner; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Somatosensory; Tactile; Neuron; Neocortex; Brain organization; Cortical functional localization;

    Sammanfattning : This thesis is concerned with the nature of information processing in the nervous system. This issue has been investigated with animal experiments, using male Sprague–Dawley rats, and simulated touch generated by an artificial fingertip with neuromorphic tactile sensors. LÄS MER

  7. 5. Chloride ion dynamics in neuronal homeostasis and plasticity: Measuring a zero current with a twitch of learning

    Författare :Christer Fåhraeus; Hjärnans sensorimotoriska funktioner; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; K-Cl cotransporter; Clˉ homeostasis; DIDS; SITS; bumetanide; mathematical modeling; intracellular glass microelectrode; electrodiffusion; electro-osmosis; tip potential; Hebb; learning;

    Sammanfattning : .... LÄS MER