Abstract：
:(1) Quantitative measurements of somatosensory thresholds and skin temperature were made before (24 cases), 3-5 days after (12 cases), and 6 months after (11 cases) successful radiofrequency thermocoagulation of the proximal root and gasserian ganglion in 24 cases of idiopathic trigeminal neuralgia (TGN), 18 of whom had not previously undergone any interventional procedure; and in 3 cases of compressive non-TGN neural and 4 of non-neural facial pain at presentation. (2) There were no differences in somatosensory thresholds between the skin innervated by the affected divisions and the unaffected mirror-image areas in previously unoperated cases of TGN and non-neural facial pain ('atypical facial pain') prior to operative intervention; but there were significant differences in tactile (von Frey) thresholds in the cases of non-TGN facial pain of neural origin. (3) In TGN immediately after operation, thresholds for all modalities except cold sensation were significantly raised. Six months later, tactile and tragus pinch pain thresholds had returned to normal; but thresholds for warmth, hot pain, and pinprick remained elevated. However, in cases who had had previous procedures for TGN between 9 months and 5 years earlier, all thresholds except pinprick and possibly hot pain had returned to normal. (4) Prior to operation for TGN, the skin temperature in the affected division was significantly lower than that in the contralateral unaffected division, presumably due to vasoconstriction. In previously operated cases in whom TGN had re-appeared, cutaneous vasoconstriction was also demonstrated.(ABSTRACT TRUNCATED AT 250 WORDS)
journal_name
Painjournal_title
Painauthors
Hampf G,Bowsher D,Wells C,Miles Jdoi
10.1016/0304-3959(90)91121-Xsubject
Has Abstractpub_date
1990-03-01 00:00:00pages
241-248issue
3eissn
0304-3959issn
1872-6623pii
00006396-199003000-00001journal_volume
40pub_type
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