Search for dissertations about: "Hand physiology"

Showing result 1 - 5 of 66 swedish dissertations containing the words Hand physiology.

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

    Author : Anna Theorin; Roland Johansson; Fredrik Ullén; Umeå universitet; []
    Keywords : 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;

    Abstract : 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. READ MORE

  4. 2. Structural and functional changes in the brain after surgically repaired median nerve injury

    Author : Per F. Nordmark; Roland S. Johansson; Henrik Ehrsson; Umeå universitet; []
    Keywords : 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;

    Abstract : 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. READ MORE

  5. 3. Sensorimotor transformations during grasping movements

    Author : Daniel Säfström; Benoni B. Edin; Melvyn A. Goodale; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; sensorimotor transformation; sensory integration; visuomotor map; human physiology; adaptation; grasping; sensory substitution; Physiology; Fysiologi;

    Abstract : ‘Sensorimotor transformations’ are processes whereby sensory information is used to generate motor commands. One example is the ‘visuomotor map’ that transforms visual information about objects to motor commands that activates various muscles during grasping movements. READ MORE

  6. 4. Tactile Sensory Control of Dexterous Manipulation in Humans

    Author : Ingvars Birznieks; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Physiology; cutaneous sensibility; tactile afferents; fingertip force; grasp stability; human hand; manipulation; object shape; precision grip; sensorimotor control; coding; Fysiologi; Physiology; Fysiologi; fysiologi; Physiology;

    Abstract : During dexterous manipulation with the fingertips, forces are applied to objects' surfaces. To achieve grasp stability, these forces must be appropriate given the properties of the objects and the skin of the fingertips, and the nature of the task. READ MORE

  7. 5. To grip and not to slip : sensorimotor mechanisms in reactive control of grasp stability

    Author : Charlotte Häger Ross; Roland S. Johansson; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; human; hand; precision grip; grasp force; friction; cutaneous mechanoreceptors; sensorimotor integration; motor control;

    Abstract : The reactive control of fingertip forces maintaining grasp stability was examined in man during a prehensile task. Blindfolded subjects used the precision grip between the tips of index finger and thumb to restrain an object that was subjected to unpredictable load forces. These were delivered tangential to the parallel grip surfaces of the object. READ MORE