Sökning: "brain theory"

Visar resultat 1 - 5 av 90 avhandlingar innehållade orden brain theory.

1. 1. It's All in the Brain : A Theory of the Qualities of Perception

   Författare :Jesper Östman; Pär Sundström; Howard Robinson; Umeå universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; Philosophy of perception; philosophy of consciousness; hallucination; phenomenal qualities; qualia; sense data; physicalism; Russell; disjunctivism; representationalism; brain theory; color; the brain; Theoretical Philosophy; teoretisk filosofi;

   Sammanfattning : This dissertation concerns the location and nature of phenomenal qualities. Arguably, these qualities naively seem to belong to perceived external objects. However, we also seem to experience phenomenal qualities in hallucinations, and in hallucinations we do not perceive any external objects. LÄS MER

3. 2. Reality-based brain-computer interaction

   Författare :Daniel Sjölie; Lars-Erik Janlert; Johan Eriksson; John Waterworth; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; reality-based brain-computer interaction; virtual reality; reality-based interaction; brain-computer interface; activity theory; the free-energy principle; grounded cognition; Cognitive science; Kognitionsvetenskap; Computer science; Datalogi; människa-datorinteraktion; människa-datorinteraktion;

   Sammanfattning : Recent developments within human-computer interaction (HCI) and cognitive neuroscience have come together to motivate and enable a framework for HCI with a solid basis in brain function and human reality. Human cognition is increasingly considered to be critically related to the development of human capabilities in the everyday environment (reality). LÄS MER

4. 3. Human brains and virtual realities : Computer-generated presence in theory and practice

   Författare :Daniel Sjölie; Lars-Erik Janlert; Johan Eriksson; Giuseppe Riva; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Human brain function; virtual reality; presence; cognitive neuroscience; human-computer interaction; brain imaging; fMRI; BCI; neural correlates; HCI theory; reality-based interaction.;

   Sammanfattning : A combined view of the human brain and computer-generated virtual realities is motivated by recent developments in cognitive neuroscience and human-computer interaction (HCI). The emergence of new theories of human brain function, together with an increasing use of realistic human-computer interaction, give reason to believe that a better understanding of the relationship between human brains and virtual realities is both possible and valuable. LÄS MER

5. 4. Methods for longitudinal brain imaging studies with dropout

   Författare :Tetiana Gorbach; Xavier de Luna; Anders Lundquist; Martin A. Lindquist; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Missing data; nonignorable dropout; sensitivity analysis; uncertainty intervals; pattern-mixture models; aging; cognition; MRI; brain structure; resting-state functional connectivity; Statistics; statistik;

   Sammanfattning : One of the challenges in aging research is to understand the brain mechanisms that underlie cognitive development in older adults. Such aging processes are investigated in longitudinal studies, where the within-individual changes over time are observed. However, several methodological issues exist in longitudinal analyses. LÄS MER

7. 5. The architecture of the aging brain : functional reorganization, structural changes, and the role of dopamine receptors

   Författare :Robin Pedersen; Alireza Salami; Anna Rieckmann; Anders Wåhlin; Lars Nyberg; Roser Sala-Llonch; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; brain architecture; functional connectivity; dopamine; aging; cognition; memory; functional magnetic resonance imaging; positron emission tomography; graph theory; Laplacian eigenmapping; gradient;

   Sammanfattning : Aging is associated with reorganization of functional brain architecture, potentially leading tocognitive decline in older age. However, the mechanisms responsible for alterations in functionalbrain architecture remain poorly understood. LÄS MER