Abstract: Trigeminocervical reflex in fibromyalgia patients

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Arch Phys Med Rehabil. 2003 Jul;84(7):1087-9.  Yuruten B, oZerbil OM.  Yuruten B, Ozerbil OM. Trigeminocervical reflex in fibromyalgia patients. Arch Phys Med Rehabil 2003;84:1087-9.

OBJECTIVE: To describe the properties of trigeminocervical reflex in normal subjects and in patients with primary fibromyalgia syndrome (PFS) having neck pain.

DESIGN: Prospective testing of trigeminocervical reflex.

SETTING: University hospital electromyography laboratory in Turkey.

PARTICIPANTS: Patients with PFS (n=16) and healthy volunteers (n=20).

INTERVENTIONS: Trigeminocervical reflex is a brainstem reflex that is evoked by stimulating the sensory branches of the trigeminal nerve and can be recorded from the neck muscles. Electric stimulation of the supraorbital nerve evokes a reflex response (C3) and early reflex response (C1). The mean latencies of C1 and C3 of patients with PFS were compared with normal values.Main Outcome Measure: The C1 and C3 latencies of trigeminocervical reflex.

RESULTS: In healthy volunteers, C3 latency +/- standard deviation was 54.17+/-6.00ms ipsilaterally and 51.25+/-9.26ms contralaterally. The difference was not significant (P=.26). The C1 latency was 17.46+/-4.89ms. In patients with PFS, C1 latency was 13.83+/-4.48ms and the C3 latency was 62.70+/-18.22ms. The difference was not significant between the patients (P=.08) and healthy volunteers (P=.17).

CONCLUSION: In patients with PFS having neck pain, trigeminocervical connections were not influenced and some other mechanisms may be responsible for pain in these patients.

PMID: 12881841 [PubMed – in process]

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