en ارتودنسی Orthodontics پژوهشي Research <p> <strong>Aims:</strong> To compare patients with combined tension-type headache and myofascial temporomandibular disorder (TMD) with control subjects on two measures of central processing-ie, temporal summation and aftersensations to heat stimulation in the trigeminal nerve and spinal nerve territories.</p><p> <strong> Methods:</strong> A novel heat stimulation protocol was used in which 13 females with tension-type headache/TMD and 20 female controls were exposed to 11 painful heat stimuli at a rate of 0.33 Hz. Two temperature ranges (low, 44°C to 46°C high, 45°C to 47°C) were tested on the cheek and arm in separate trials. Perceived pain was rated on a 100-mm visual analog scale after the second, sixth, and eleventh stimulus presentation and every 15 seconds after the final stimulus presentation (aftersensations) for up to 3 minutes. The duration of aftersensations was compared using the student unpaired t test with Welch correction. </p><p> <strong>Results:</strong> Temporal summation was not observed in any of the groups, but aftersensations were consistently reported. The aftersensations lasted longer in tension-type headache/TMD patients (right cheek, 100.4 ± 62.0 seconds right arm, 115.4 ± 64.0 seconds) than in controls (right cheek, 19.5 ± 2.5 seconds right arm, 20.3 ± 2.7 seconds) (P < .05). A cutoff value (right cheek, 44.6 seconds right arm, 41.5 seconds) provided a sensitivity and specificity of 0.77 and 0.95, respectively, with the high stimulus protocol. </p><p> <strong>Conclusion:</strong> The results from this pilot study suggest that aftersensations to painful heat stimulation can appear without temporal summation. Furthermore, the developed test protocol has a good predictive value and may have the potential to discriminate between tension-type headache/TMD patients and control subjects. </p><hr><p></p><p> <strong>Source: </strong>Journal Of Orofacial Pain </p><p> <a href="http://jop.quintessenz.de/index.php?jid=jop&doc=toc&year=2012&issue=4" target="_blank"><font color="#0033ff">Full Text</font></a> </p> aftersensations, central sensitization, myofascial pain, temporal summation, temporomandibular disorder, tension-type headache 0 0 http://idai.ir/browse.php?a_code=A-10-32-802&slc_lang=en&sid=1 Hitoshi Sato 10031947532846003522 10031947532846003522 Yes Hironori Saisu 10031947532846003523 10031947532846003523 No Wataru Muraoka 10031947532846003524 10031947532846003524 No Taneaki Nakagawa 10031947532846003525 10031947532846003525 No Peter Svensson 10031947532846003526 10031947532846003526 No Koichi Wajima 10031947532846003527 10031947532846003527 No