MULTIDISCIPLINARY PAIN ABSTRACTS: 20

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 parallel fibers (PFS) were compared with normal values. In healthy volunteers, C3 latency ± standard deviation was 54.17 ± 6.00 ms ipsilaterally and 51.25 ± 9.26 ms contralaterally. The difference was not significant. The C1 latency was 17.46 ± 4.89 ms. In patients with PFS, C1 latency was 13.83 ± 4.48 ms and the C3 latency was 62.70 ± 18.22 ms. The difference was not significant between the patients and healthy volunteers. Conclude in patients with PFS having neck pain, trigeminocervical connections were not influenced and some other mechanisms may be responsible for pain in these patients.