Siegfried J, Haas H L
Eur Neurol. 1979;18(5):353-5. doi: 10.1159/000115102.
During percutaneous thermocoagulation of the Gasserian ganglion for trigeminal pain, the pain perception threshold was established in a series of 25 awake patients by measuring the temperature at the electrode tip within the ganglion during slow increase of the radiofrequency current. Between 42 and 48 degress C pain perception was regularly reported by the patients. A cutaneous-stimulating system was then applied to the trigeminal area which was reported to be painful during the heating. The external stimulation attempted to preferentially stimulate the A afferent nerve fibres. When external stimulation was applied during the heating of the Gasserian ganglion, the pain perception threshold was enhanced in about half of the cases. A transcutaneous electrical stimulation of part of the body not related with the investigated pain sensation did not produce the same inhibitory action in 3 out of 5 cases.
在对三叉神经痛患者进行半月神经节经皮热凝治疗期间，通过在缓慢增加射频电流时测量神经节内电极尖端的温度，为25例清醒患者确定了痛觉阈值。患者通常在42至48摄氏度时报告有痛觉。然后将皮肤刺激系统应用于加热期间报告疼痛的三叉神经区域。外部刺激试图优先刺激A类传入神经纤维。在半月神经节加热期间施加外部刺激时，约一半病例的痛觉阈值提高。对与所研究的痛觉无关的身体部位进行经皮电刺激，5例中有3例未产生相同的抑制作用。
