LATE SOMATOSENSORY EVOKED CEREBRAL POTENTIALS IN RESPONSE TO CUTANEOUS HEAT STIMULI
LATE SOMATOSENSORY EVOKED CEREBRAL POTENTIALS IN RESPONSE TO CUTANEOUS HEAT STIMULI
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DOI：
10.1016/0013-4694(88)90020-x
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发表时间：
1988-11-01
期刊：
影响因子：
--
通讯作者：
BROMM, B
中科院分区：
文献类型：
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作者：
TREEDE, RD;KIEF, S;BROMM, B
应用于各种皮肤部位的短暂热脉冲诱发的脑电位的晚期成分被用来监测疼痛和温度敏感性的传入通路。由CO2激光刺激器产生的10.6 μ m波长的辐射主要激活浅表皮肤A δ。和C伤害性感受器与脑电位的关系。本文论述了调查的组成结构和地形的A.纤维介导的晚电位，将其与响应于标准电神经刺激的相应晚电位进行比较。在上肢的两种刺激类型引起了一个大的正电位（神经：260毫秒，皮肤：390毫秒的潜伏期），之前的负（神经：140毫秒，皮肤：250毫秒）。而这些组件总是最大的顶点，较早的负性出现在躯体感觉投射区（神经：70毫秒，皮肤：170毫秒）。在刺激下肢后，所有潜伏期延迟20-30毫秒。作为一项规则，热诱发电位出现约100毫秒后，比相应的电位电神经刺激后。在峰间lavage和头皮地形的相似性表明类似的大脑处理。
Late components of cerebral potentials evoked by brief heat pulses applied to various skin sites were used to monitor the afferent pathways of pain and temperature sensitivity. Radiation at 10.6 .mu.m wave length generated by a CO2 laser stimulator predominantly activates superficial cutaneous A.delta. and C nociceptors and elicits late and ultralate cerebral potentials. This paper deals with the investigation of the component structure and topography of the A.delta. fibre mediated late potentials, which were compared with the corresponding late potentials in response to standard electrical nerve stimuli. In the upper limb both stimulus types evoked a large positive potential (nerve: 260 msec, skin: 390 msec latency), preceded by a negativity (nerve: 140 msec, skin: 250 msec). Whereas these components were always maximal at the vertex, an earlier negativity appeared over the somatosensory projection area (nerve: 70 msec, skin: 170 msec). After stimulation of the lower limb all latencies were delayed by 20-30 msec. As a rule, the heat-evoked potentials appeared about 100 msec later than the corresponding potentials after electrical nerve stimulation. Similarities in interpeak latencies and scalp topography indicated similar cerebral processing.