Clinical study of the contact heat evoked potentials
10.3760/cma.j.issn.1671-8925.2009.07.025
- VernacularTitle:接触性热痛诱发电位的临床研究
- Author:
Ju-Yang ZHENG
1
;
Ying-Sheng XU
;
Shuo ZHANG
;
Jun ZHANG
;
De-Xuan KANG
;
Dong-Sheng FAN
Author Information
1. 北京大学第三医院
- Keywords:
Pain evoked potential;
Contact heat stimulus
- From:
Chinese Journal of Neuromedicine
2009;8(7):742-744
- CountryChina
- Language:Chinese
-
Abstract:
Objective To search for a method to differentiate the peripherial and central part of spinothalamic tract. Methods The subjects were set on supine position. A heat-foil technology was used to elicit pain and contact heat evoked potentials (CHEP). Thermal stimuli were sent at 54.5 ℃ to three body sites: the dorsum of hand, proximal volar foratm and C7. CHEP was recorded from Cz and Pz. The main components of CHEP were watched. Nerve conduction velocity was calculated. Results Two components, Cz/N550 and Cz/P750, were found in the evoked potentials. The latency of CHEP were different when the dorsum of hand, proximal volar forarm and C, were stimulated respectively. There was no statistical difference between males and females. Nerve conduction velocity of the fiber was (12.9±7.5) m/s which was corresponded to that of AS fiber. Conclusion It is suggested that pain evoked potential could be elicited reliably,the stimulation of C7 would help differentiate the lesion of peripherial and central part of spinothalamic tract.
