Sökning: "fredrik ullèn"

Hittade 4 avhandlingar innehållade orden fredrik ullèn.

  1. 1. Neural mechanisms for the visual control of spatial orientation and locomotion : electrophysiological and behavioural studies of the supraspinal control of posture and steering in the lamprey central nervous system, with reference to visuo-motor mechanisms

    Författare :Fredrik Ullén; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Neural mechanisms for the supraspinal control of posture and steering, in particular visuo-motor control and visuo-vestibular interaction in postural control, were investigated, using the lamprey as a model system. Behavioural experiments on intact and chronically lesioned animals, intra- and extracellular recordings in vitro and retrograde staining of neurons with horseradish peroxidase were utilized. LÄS MER

  3. 2. Ideology and Symbolism in the Novels of Cormac McCarthy

    Författare :Fredrik Svensson; Magnus Ullén; Maria Holmgren Troy; Nicholas Monk; Karlstads universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; Cormac McCarthy; Pierre Macherey; Marxism; ideology; affordances; symbolism; ecocriticism; English; Engelska;

    Sammanfattning : This study homes in on the ideological significance of American author Cormac McCarthy’s literary symbolism. Focusing in particular on the author’s tendency to merge hu­manity and the environment by way of metaphor, simile, and personifica­tion, the study demonstrates how the ethical and political import of this aesthetic is open to dispute. LÄS MER

  4. 3. Exploring models of time processing : effects of training and modality, and the relationship with cognition in rhythmic motor tasks

    Författare :Olympia Karampela; Guy Madison; Linus Holm; Fredrik Ullén; Simon Grondin; Umeå universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; timing; motor timing; cogntion; dedicated models; intrinsic models; timing variability;

    Sammanfattning : Timing can be defined as the ability to perceive temporal sequences and regulate timed behaviors. As in other animals, our ability to make accurate time estimations is crucial in order to accomplish several activities. Organisms can process time over a wide range of durations ranging from microseconds to days. LÄS MER

  5. 4. To select one hand while using both : neural mechanisms supporting flexible hand dominance in bimanual object manipulation

    Författare :Anna Theorin; Roland Johansson; Fredrik Ullén; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; object manipulation; bimanual coordination; action selection; cerebral cortex; functional laterality; humans; hand; magnetic resonance imaging; transcranial magnetic stimulation; electromyography; Physiology; Fysiologi; fysiologi; Physiology;

    Sammanfattning : In daily activities, the brain regularly assigns different roles to the hands dependingon task and context. Yet, little is known about the underlying neural processes. Thiscertainly applies to how the brain, where each hemisphere primarily controls onehand, manages the between-hand coordination required in bimanual objectmanipulation. LÄS MER