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Rehabilitation Practice and Science

Translated Title

大白鼠骨骼肌中可誘發局部抽搐反應部位之分佈

Abstract

Myofascial trigger point (MTrP) is a quite common painful muscular disorder in clinical practice. When an MTrP is mechanically stimulated (needling or snapping palpation), a local twitch response (LTR) can be elicited, which is one of the characteristics of MTrP. Recent studies on humans and rabbits suggest that an MTrP is at the endplate zone. The purpose of this study is to map the distribution of sensitive loci from which an LTR can be elicited by mechanical stimulation of it in rat skeletal muscle. A total of 39 Sprague-Dawley rats were studied in this experiment. After general anesthesia, the biceps femoris was exposed, and electrical stimulation with a threshold current of 0.5-1.0 mA was applied to identify the endplate zone. Nine to thirteen tracks (1 mm apart between tracks) were explored for each muscle. For each track, every 1 mm was an investigating site. To elicit LTRs, the needle was rapidly inserted perpendicularly into the muscle. It was found that, although some sensitive loci were distributed in the periphery, most of the sensitive loci were concentrated in the endplate zones, with statistical significance. This finding may further support the hypothesis that MTrPs are related to abnormal endplates.

Language

English

First Page

1

Last Page

8

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