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Visar resultat 1 - 5 av 114 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Electromyography and bite force studies of muscular function and dysfunction in masticatory muscles

   Författare :Catharina Hagberg; []
   Nyckelord :Electromyography; bite force; contraction; isometric; masticatory muscles; mastication; intramuscular injections;

   Sammanfattning : Electromyographic (EMG) activity versus bite force was studied during a gradually increased isometric contraction up to maximal effort for patients with painful masseter muscles and referents. The masseter muscle, the anterior temporal muscle and the descending part of the trapezius muscle were chosen for the recordings. 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. Physiology of Cross-Country Skiing : with a special emphasis on the role of the upper body

   Författare :Hans-Christer Holmberg; Björn Ekblom; Johnny Nilsson; Niels H. Secher; Mittuniversitetet; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Arterial O2 saturation; blood flow; conductance; cross-country skiing; double poling; electromyography; ergometer; O2 extraction; force; lung; muscle adaptation; oxygen uptake; oxygen cost; pulmonary gas exchange; training; upper body; Sports; Idrott; Arterial O2 saturation; blood flow; conductance; cross-country skiing; double poling; electromyography; ergometer; O2 extraction; force; lung; muscle adaptation; oxygen uptake; oxygen cost; pulmonary gas exchange; training; upper body; Medicin Teknik;

   Sammanfattning : .... LÄS MER

5. 4. Adaptive signal processing of surface electromyogram signals

   Författare :Nils Östlund; Stefan Karlsson; Jun Yu; Björn Gerdle; Leif Sörnmo; Umeå universitet; []
   Nyckelord :Signalbehandling; electromyography; signal processing; Signalbehandling; biomedicinsk strålningsvetenskap; Biomedical Radiation Science;

   Sammanfattning : Electromyography is the study of muscle function through the electrical signals from the muscles. In surface electromyography the electrical signal is detected on the skin. The signal arises from ion exchanges across the muscle fibres’ membranes. LÄS MER

7. 5. Effects of vibration on muscles in the neck and upper limbs : with focus on occupational terrain vehicle drivers

   Författare :Charlotte Åström; Gunnevi Sundelin; Lage Burström; Stefan Karlsson; Karin Harms-Ringdahl; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Electromyography; drivers; hand-arm vibration; trapezius; whole-body vibration; Physiotherapy; Sjukgymnastik fysioterapi;

   Sammanfattning : Introduction: Occupational drivers of terrain vehicles are exposed to several risk factors associated with musculoskeletal symptoms in the lower back as well as in the neck and upper limbs. Vibration has been suggested to be a main risk factor. These drivers are exposed to both whole-body vibration (WBV) and hand-arm vibration (HAV). LÄS MER