Sökning: "reflex"

Visar resultat 1 - 5 av 128 avhandlingar innehållade ordet reflex.

  1. 1. Aspects of central integrative and efferent mechanisms in cardiovascular reflex control

    Författare :Göran Wennergren; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Afferent Pathways; physiology; Animals; Arteries; physiology; Blood Circulation; Blood Pressure; Brain; physiology; Cats; Chemoreceptor Cells; physiology; Coronary Circulation; Coronary Vessels; physiology; Efferent Pathways; physiology; Electric Stimulation; Female; Heart; innervation; physiology; Heart Rate; Hypothalamus; physiology; Male; Pressoreceptors; physiology; Reflex; Sympathetic Nervous System; physiology; Ventricular Function;

    Sammanfattning : .... LÄS MER

  3. 2. On spinal mechanisms for reflex control in man : modulation of Ia-afferent excitation with changes in muscle length, activation level and fatigue

    Författare :Maria M. Nordlund; Gymnastik- och idrottshögskolan; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Electromyography; eccentric; concentric; presynaptic inhibition; H-reflex; central fatigue; twitch interpolation; muscle spindle; Medicin Teknik; Medicine Technology; Electromyography; eccentric; concentric; presynaptic inhibition; H-reflex; central fatigue; twitch interpolation; muscle spindle;

    Sammanfattning : To control muscle force, neural activation has to take alterations in muscle mechanics into account. This thesis assesses modulations in excitatory efficacy of Ia-afferents during muscle length changes at different levels of voluntary activation and during fatigue. LÄS MER

  4. 3. Prolonged Modulation of the Micturition Reflex by Electrical Stimulation

    Författare :Chong-He Jiang; Sivert Lindström; Magnus Fall; Linköpings universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Intravesical electrical stimulation; IVES; bladder evacuation problems; bladder; micturition reflex; Urology and andrology; Urologi och andrologi;

    Sammanfattning : Intravesical electrical stimulation (IVES) has been used in treatment of patients with urinary bladder dysfunctions for more than four decades. While some investigators have reported excellent results others have observed less convincing effects or outright failures. LÄS MER

  5. 4. Spinal Cord Processing of Sensory Information: Spatial Organization and Adaptive Mechanisms

    Författare :Anders Levinsson; Malmö Diagnostisk radiologi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Neurologi; neurophysiology; neuropsychology; Neurology; transplantatioin; pain; sensorimotor; plasticity; reflex; neuropsykologi; neurofysiologi;

    Sammanfattning : Principles for sensorimotor transformation and plasticity in the spinal cord and functional repair in the root-avulsed spinal cord were studied. A comparative study confirmed that the nociceptive withdrawal reflex (NWR) system is composed of reflex modules, with each performing a finely tuned transformation of skin sensory input to activity in one muscle. LÄS MER

  7. 5. Volunteer Muscle Activity in Dynamic Events. Input Data for Human Body Models

    Författare :Jóna Marin Olafsdottir; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; emergency braking; ative human body model; multidirectional perturbations; EMG; occupant kinematics; seatbelt pre-tension; reflex; validation data;

    Sammanfattning : Human body models (HBMs) are virtual human surrogates used to predict kinematic and injury responses during motor vehicle crashes. In recent years, active musculature has been incorporated into HBMs for enhanced biofidelity in simulated emergency scenarios, in particular low-severity crashes and pre-crash situations, where occupant responses are influenced by muscle tension. LÄS MER