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| Aberrant protective force generation during neural provocation testing and the effect of treatment in patients with neurogenic cervicobrachial pain |
| Coppieters MW, Stappaerts KH, Wouters LL, Janssens K |
| Journal of Manipulative and Physiological Therapeutics 2003 Feb;26(2):99-106 |
| clinical trial |
| 5/10 [Eligibility criteria: Yes; Random allocation: Yes; Concealed allocation: Yes; Baseline comparability: Yes; Blind subjects: No; Blind therapists: No; Blind assessors: Yes; Adequate follow-up: No; Intention-to-treat analysis: No; Between-group comparisons: Yes; Point estimates and variability: No. Note: Eligibility criteria item does not contribute to total score] *This score has been confirmed* |
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BACKGROUND: Observation of the occurrence of protective muscle activity is advocated in assessment of the peripheral nervous system by means of neural provocation tests. However, no studies have yet demonstrated abnormal force generation in a patient population. OBJECTIVES: To analyze whether aberrations in shoulder girdle-elevation force during neural tissue provocation testing for the median nerve (NTPT1) can be demonstrated, and whether possible aberrations can be normalized following cervical mobilization. STUDY DESIGN: A single-blind randomized comparative controlled study. SETTING: Laboratory setting annex in a manual therapy teaching practice. PARTICIPANTS: Twenty patients with unilateral or bilateral neurogenic cervicobrachial pain. METHODS: During the NTPT1, we used a load cell and electrogoniometer to record continuously the shoulder-girdle elevation force in relation to the available range of elbow extension. Following randomization, we analyzed the immediate treatment effects of a cervical contralateral lateral glide mobilization technique (experimental group) and therapeutic ultrasound (control group). RESULTS: On the involved side, the shoulder-girdle elevation force occurred earlier, and the amount of force at the end of the test was substantially, though not significantly, greater than that on the uninvolved side at the corresponding range of motion. Together with a significant reduction in pain perception after cervical mobilization, a clear tendency toward normalization of the force curve could be observed, namely, a significant decrease in force generation and a delayed onset. The control group demonstrated no differences. CONCLUSIONS: Aberrations in force generation during neural provocation testing are present in patients with neurogenic pain and can be normalized with appropriate treatment modalities.
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