This study pertains to the 71 patients who had received a diagnosis of cervico-brachial pain syndrome after thorough clinical examination of a total series of 300 patients, who had been referred to the National Insurance Hospital in Tranas because of chronic neck pain that interfered with their ability to work.
Changes in trapezius muscle blood flow and EMG were examined and related to the anamnesis and physical findings.
The microcirculation in the upper part of the right and left trapezius muscles was examined simultaneously by using optical laser-Doppler single-fibres after insertion into the muscle directly via the skin.
Continuous recordings were made during stepwise increased static contraction determined electro-myographically.
Signal processing was performed on-line by computer.
MRT of the cervical spine was performed in 12 patients.
None showed nerve root affliction.
Ten showed a bulging intervertebral disc and two, a narrowed nerve hole (lateral stenosis).
The muscle blood flow (LDF) was significantly lower in the most painful side compared with the opposite side in the group of 41 patients with predominantly unilateral pain (21 women and 20 men).
A lowered blood flow was also found when the 21 females in this group was compared with a normal control group of 20 healthy women.
The patients had lower rms-EMG and EMG mean power frequency (MPF) in the painful side compared with the opposite side.
A further lowering of the MPF was observed with induced fatigue. (...)
Mots-clés Pascal : Cou, Epaule, Douleur, Etiologie, Chronique, Homme, Capacité travail, Absentéisme, Suède, Europe, Muscle trapèze, Microcirculation, Médecine travail
Mots-clés Pascal anglais : Neck, Shoulder, Pain, Etiology, Chronic, Human, Work capacity, Absenteeism, Sweden, Europe, Trapezius muscle, Microcirculation, Occupational medicine
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0235786
Code Inist : 002B15I. Création : 11/09/1998.