Myofascial syndrome and pain: A neurophysiological approach
作者： Juhani V. Partanen , Tuula A. Ojala , Jari P.A. Arokoski
DOI: 10.1016/J.PATHOPHYS.2009.05.001
关键词: Contracture 、 Reflex 、 Anatomy 、 Electromyography 、 Muscle spindle 、 Nociception 、 End-plate potential 、 Contraction (grammar) 、 Inflammation 、 Medicine 、 Pathology and Forensic Medicine 、 Physiology (medical)
摘要: Abstract It has been debated whether muscle spindles have a role in myofascial pain or not. We present number of arguments for the former hypothesis. was hypothesized that firing intrafusal fibres, i.e. fusimotor activity can be observed as "end plate spikes" (EPSs) electromyography (EMG). The EPSs may found local active spots muscle, often associated with miniature end potentials (MEPPs). Insertion EMG needle electrodes into an spot is painful, indicating nociception spindle. Myofascial syndrome patients taut bands trigger points (TrPs) painful muscles. End (EPSs and MEPPs) significantly more common finding TrPs than control presence spindles. However, some sites show normal Increased amount inflammatory metabolites TrPs. Muscle spindle capsulated gel-filled container, where contraction heavily concentrated during sustained activation. Thus chemosensitive mediating III- IV-afferents are sensitized activated. Intrafusal inflammation causes further reflex activation skeletofusimotor systems via IV-afferents. band itself contracture (rigor) (beta) units caused by drive given In this seen complex repetitive discharges. conclude related to bands.
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