Sökning: "flexor"

Visar resultat 11 - 15 av 46 avhandlingar innehållade ordet flexor.

1. 11. The Hand in Manual Work - Physiological and Psychophysical studies

   Författare :Lena Johansson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; hand; pressure; muscle activity; laser doppler flowmeter; perception; manual work; hand tool; drilling machine; cutaneous blood flow; wrist orthosis;

   Sammanfattning : This thesis focuses on the hand in manual work. In particular, we have studied what happens to skin and muscles when gripping a hand tool. Different aspects of gripping that will be discussed are: pressure on the hand, effects on the skin blood flow, muscle activity and the use of wrist orthoses. LÄS MER

3. 12. Walking efficiently with smart springs

   Författare :Israel Luis; Elena Gutierrez-Farewik; Ruoli Wang; Benjamin J. Fregly; KTH; []
   Nyckelord :Musculoskeletal modeling and simulation; muscle-tendon biomechanics; muscle parameter calibration; metabolic energy models; gait analysis; exoskeleton assistance; biomechanics; Biomekanisk modellering och simulering; rörelseorganen; biomekanik; muskel; muskelmodell och muskelarkitektur; metabolisk energi och kostnad; gång; gånganalys; exoskelett; hjälpmedel; gångpatologi; Teknisk mekanik; Engineering Mechanics;

   Sammanfattning : Numerous assistive exoskeletons have been developed in recent years to assist walking in individuals with and without motor disorders. A standard metric to measure the efficacy of assistance is the change in the metabolic energy cost between unassisted and assisted conditions. LÄS MER

4. 13. 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

5. 14. Post activation potentiation : Modulating factors and mechanisms for muscle performance

   Författare :Paulo Gago; Ekblom Maria; Anton Arndt; Nicola Maffiuletti; Gymnastik- och idrottshögskolan; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Potentiation; twitch; triceps surae; knee angle; stiffnes; length changes; electromechanical delay; Medicin Teknik; Medicine Technology;

   Sammanfattning : Introduction: Acute enhancements of muscle contractile properties and performance subsequent to a maximal or near maximal conditioning contraction are often termed post activation potentiation (PAP). Although still controversial, PAP is commonly linked to enhancements in the myosin regulatory light chain phosphorylation, leading to improvements in the excitation–contraction coupling. LÄS MER

7. 15. Pain related aspects of neck muscle performance, functioning and psychosocial factors in individuals with cervical radiculopathy

   Författare :Marie Halvorsen; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :activity limitations;

   Sammanfattning : Aim: The overall aim of the work presented in this thesis was to describe and explore pain-related aspects of neck muscle performance, functioning and psychosocial factors in individuals with cervical radiculopathy (CR). Methods: Participants were 157 patients with CR. Also Study II included 33 asymptomatic age-and gender-matched controls. LÄS MER