Iida M, Sakai M, Igarashi M
Department of Otorhinolaryngology, School of Medicine, Tokai University, Japan.
Tokai J Exp Clin Med. 1997 Sep;22(3):137-9.
Positron emission tomography (PET) was used to demonstrate temporary down-regulation of visual cortex activities associated with eye movements. The aim of the present study was to test this paradigm with visual evoked potentials (VEPs) in the visual cortex of 7 healthy human subjects during caloric nystagmus. Caloric stimulation was performed by irrigating the right or left external ear canals with 100 ml of warm water at 44 degrees C for 50 s with a head position of 60 degrees tilted backward in order to stimulate the horizontal semicircular canal. The subjects kept their eyes closed during and after caloric stimulation. For recording the VEPs, the flashlight was used for activating the visual cortex with the subject's eyes closed. In the 7 subjects, no significant difference was detected between the VEPs induced with and without caloric stimulation.
正电子发射断层扫描（PET）被用于证明与眼球运动相关的视觉皮层活动的暂时下调。本研究的目的是在7名健康人类受试者的视觉皮层中，利用视觉诱发电位（VEP）在冷热性眼震期间测试这一范式。通过用100毫升44摄氏度的温水冲洗右或左外耳道50秒来进行冷热刺激，头部位置向后倾斜60度以刺激水平半规管。在冷热刺激期间及之后，受试者闭上眼睛。为了记录VEP，在受试者闭眼时使用手电筒激活视觉皮层。在这7名受试者中，冷热刺激诱导的VEP与未进行冷热刺激诱导的VEP之间未检测到显著差异。
