in this study, conical somatosensory evoked potentials (SEPs)following electrical stimulation of the skin of LS and SI dermatomes were recorded cephalically and observed in 19 patients with clinically proved unilatera...in this study, conical somatosensory evoked potentials (SEPs)following electrical stimulation of the skin of LS and SI dermatomes were recorded cephalically and observed in 19 patients with clinically proved unilateral L5 or S1 nerve root compression, and the results were compared with those of the control group or 20 healthy volunteers and showed that dermatomal SEPs were abnormal in 12 with the rate of 63%,most or which showed abnomalities or the lateral latency difference. It is concluded that dermatomal SEP is a useful addition to the diagnosis or lumbosacral nerve root compression. When the unilateral nerve root is compressed the lateral latency dirference is a most sensitive criterion for indicating abnomality.展开更多
目的:观察三叉神经根慢性压迫损伤对大鼠三叉神经脊束核尾侧亚核(caudal subnucleus of the spinaltrigeminal nucleus,Vc)内广动力范围(wide dynamic range neurons,WDR)神经元自发放电和诱发放电活动的影响。方法:通过慢性压迫损伤三...目的:观察三叉神经根慢性压迫损伤对大鼠三叉神经脊束核尾侧亚核(caudal subnucleus of the spinaltrigeminal nucleus,Vc)内广动力范围(wide dynamic range neurons,WDR)神经元自发放电和诱发放电活动的影响。方法:通过慢性压迫损伤三叉神经根的方法建立三叉神经痛(TN)动物模型,采用在体细胞外记录技术观察空白对照组和TN模型组大鼠Vc内WDR神经元的自发放电和诱发的放电活动。结果:对照组和TN模型组大鼠Vc内WDR神经元自发放电频率分别为0.84±0.15 Hz和3.18±0.59 Hz;口面部感受野分别给予刷、压、夹机械刺激后,对照组大鼠Vc内WDR神经元的诱发放电频率分别为3.27±1.28 Hz、5.62±0.74 Hz和6.76±1.22 Hz,而TN组大鼠诱发放电频率则分别为7.85±1.57 Hz、10.04±0.72 Hz和12.04±1.77 Hz。结论:TN模型组大鼠Vc内WDR神经元的自发放电频率和诱发放电频率均显著高于对照组大鼠,提示三叉神经根慢性压迫损伤可诱导Vc内WDR神经元兴奋性增强。展开更多
Trigeminal neuralgia is a syndrome due to dysfunctional hyperactivity of the trigeminal nerve, and is characterized by a sudden, usually unilateral, recurrent lancinating pain arising from one or more divisions of the...Trigeminal neuralgia is a syndrome due to dysfunctional hyperactivity of the trigeminal nerve, and is characterized by a sudden, usually unilateral, recurrent lancinating pain arising from one or more divisions of the nerve. The most accepted pathogenetic mechanism for trigeminal neuralgia is compression of the nerve at its dorsal root entry zone or in its distal course. In this paper, we report four cases with trigeminal neuralgia due to an unknown mechanism after an intracranial intervention The onset of trigeminal neuralgia after surgical interventions that are unrelated to the trigeminal nerve suggests that in patients with greater individual susceptibility, nerve contact with the vascular structure due to postoperative pressure and changes in cerebrospinal fluid flow may cause the onset of pain.展开更多
目的：比较超声与肌电图检查在腰骶神经根病变和下肢周围神经病变鉴别诊断中的临床价值。方法采用前瞻性临床研究的方法，将32例疑为腰骶神经根病的患者进行超声与肌电图检查，排除外周神经病变；对15例疑为外周神经病变者，注意有无腰...目的：比较超声与肌电图检查在腰骶神经根病变和下肢周围神经病变鉴别诊断中的临床价值。方法采用前瞻性临床研究的方法，将32例疑为腰骶神经根病的患者进行超声与肌电图检查，排除外周神经病变；对15例疑为外周神经病变者，注意有无腰骶神经根病变的神经肌电图表现。结果在32例初诊腰骶神经根病变者中，神经肌电图筛查出4例为周围神经病变（12．5％），超声筛查出5例为周围神经病变（15．6％）。两者相比较，差异无统计学意义（P ＞0．05）；在15例初诊为外周神经病变者，神经肌电图筛查出腰骶神经根病变3例（20．0％），超声未筛查出腰骶神经根病变。两者相比较，差异有统计学意义（χ2＝6．47， P ＜0．05）。结论神经肌电图检查和超声检查在腰骶神经根病变和下肢外周神经病变的鉴别诊断中具有一定的意义。两者在周围神经病变的检出率方面效果相似。展开更多
文摘in this study, conical somatosensory evoked potentials (SEPs)following electrical stimulation of the skin of LS and SI dermatomes were recorded cephalically and observed in 19 patients with clinically proved unilateral L5 or S1 nerve root compression, and the results were compared with those of the control group or 20 healthy volunteers and showed that dermatomal SEPs were abnormal in 12 with the rate of 63%,most or which showed abnomalities or the lateral latency difference. It is concluded that dermatomal SEP is a useful addition to the diagnosis or lumbosacral nerve root compression. When the unilateral nerve root is compressed the lateral latency dirference is a most sensitive criterion for indicating abnomality.
文摘Trigeminal neuralgia is a syndrome due to dysfunctional hyperactivity of the trigeminal nerve, and is characterized by a sudden, usually unilateral, recurrent lancinating pain arising from one or more divisions of the nerve. The most accepted pathogenetic mechanism for trigeminal neuralgia is compression of the nerve at its dorsal root entry zone or in its distal course. In this paper, we report four cases with trigeminal neuralgia due to an unknown mechanism after an intracranial intervention The onset of trigeminal neuralgia after surgical interventions that are unrelated to the trigeminal nerve suggests that in patients with greater individual susceptibility, nerve contact with the vascular structure due to postoperative pressure and changes in cerebrospinal fluid flow may cause the onset of pain.
文摘目的：比较超声与肌电图检查在腰骶神经根病变和下肢周围神经病变鉴别诊断中的临床价值。方法采用前瞻性临床研究的方法，将32例疑为腰骶神经根病的患者进行超声与肌电图检查，排除外周神经病变；对15例疑为外周神经病变者，注意有无腰骶神经根病变的神经肌电图表现。结果在32例初诊腰骶神经根病变者中，神经肌电图筛查出4例为周围神经病变（12．5％），超声筛查出5例为周围神经病变（15．6％）。两者相比较，差异无统计学意义（P ＞0．05）；在15例初诊为外周神经病变者，神经肌电图筛查出腰骶神经根病变3例（20．0％），超声未筛查出腰骶神经根病变。两者相比较，差异有统计学意义（χ2＝6．47， P ＜0．05）。结论神经肌电图检查和超声检查在腰骶神经根病变和下肢外周神经病变的鉴别诊断中具有一定的意义。两者在周围神经病变的检出率方面效果相似。
