Experimentell och epidemiologisk - relationen psykosocial exponering, stress, psykisk

Abstract

In this literature overview is analyzed experimental studies, field studies, cross-sections' - and longitudinella studies of epidemiologic nature concerning the relationship psychosocial exposure, psychic load and muscle activity and pain in neck and shoulder with special focus on the Trapeziusmuscle. It is established within experimental oriented research that induced psychic load can lead to increased muscle activity obtained with use of either surface - intramuscular electromyografic technology (yEMG respective iEMG) in Trapezius. If the muscle activity already is high as a result of physically generated load so does not the psychic load contribute with further measurable muscle activity. Trapezius seems to last a part in, at least sometimes and in certain situations, our stressing mobilisation. We seem to therefore to use this muscle without that it at all is physically motivated. Compared with the spine's other muscles, is established that it is evolution pea reasonable, but that only limited research support the finding of the relative unique reaction pattern in the Trapezius muscle in regard to psychic load. Concurrent that it stands clear that stress can result in increased muscle activity it is unclear in the literature if induced muscle activity can trigger or maintain pain in Trapezius. Some mechanism oriented models are presented generally. It is in the future important to study what consequences an increased but still low and long lasting muscle activity can have in the development of pain. The need of continued discussion concerning epidemiologic research within the area is emphasized and a starched focus on experimental research in order to understand mechanisms is to be considered.