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We describe a case of continuous motor unit potential (MUP) activity of central origin (unlike stiff man syndrome and progressive encephalomyelitis) characterized clinically by rigidity, painful muscle spasms, abnormal postures and spinal myoclonus. The topography of the manifestations, the subacute and benign course, the presence of stable sequels 2 years after onset and a searching process of differential diagnosis lead us to attribute the condition to an inflammation of the cord, which makes the case of particular clinical interest.
Sommario Descriviamo un caso con attività continua di potenziali di unità motoria (MUP) di origine centrale (diverso dalla sindrome dell'uomo rigido e della encefalomieliti progressive) clinicamente espresse da rigidità, spasmi muscolari dolorosi, posture abnormi e mioclono spinale. La topografia delle manifestazioni, il decorso subacuto e benigno, la presenza di esiti stabilizzati a distanza di due anni e un'attenta disamina differenziale, ci fanno ritenere l'affezione secondaria a un fatto infiammatorio midollare, il che rende il caso di particolare interesse clinico.
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Microneurography was performed in a 39-year-old woman with demyelination of the pontine white matter associated with muscle spasms in the lower extremities. Single bursts on the microneurogram were observed immediately after cessation of the spasm with no systemic changes in the blood pressure or heart rate. Voluntary tonic flexion of the lower extremities induced similar bursts with small amplitudes. These reflex bursts possessed a characteristic of muscle sympathetic nerve activity, because the latency between the peak of each burst and the prior R-wave on the electrocardiograph was constant. The occurrence of these bursts suggests that a segmental compensatory mechanism in the spinal cord may stabilize the muscle blood flow influenced by muscle contraction.  相似文献
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目的 评价注射用A型肉毒毒素改善脑卒中亚急性期和恢复期肌肉痉挛和活动功能的效果比较.方法 选择2013年6月~2016年1月在我院就诊的脑卒中患者86例,根据病史长短分为亚急性期组(<1个月)37例和恢复期组(≥1个月)49例,均接受肉毒毒素200 U肌肉注射,疗程4周,评价治疗后改良Ashworth量表(MAS)、改良Tardieu量表(MTS)、徒手肌力检查法(MMT)、被动关节活动度(PROM)、Barthel指数和Fugl-Meyer量表.结果 所有患者均顺利接受治疗,两组随访时间分别为26(22~30)d和29(24~31)d,组间比较差异无统计学意义(Z=1.332,P=0.307);亚急性期组治疗后肘部、腕部MAS评分较疗前改善(P<0.05),而恢复期组MAS无明显差异(P>0.05),亚急性期组均优于恢复期组(P<0.05);亚急性期组治疗后肘部R1、D和腕部R1、R2均有改善(P<0.05),恢复期组治疗后MTS中肘部R1、D和腕部R1较治疗前改善(P<0.05),亚急性期组腕部R1、R2优于恢复期组(P<0.05);亚急性期组治疗后MMT肘部外展较治疗前改善(P<0.05),其他指标无改善;亚急性期组PROM腕部外展、腕部活动度较治疗前改善(P<0.05),恢复期组各指标治疗后无明显改善(P>0.05),亚急性组腕部外展优于恢复期组(P<0.05);亚急性期组Barthel指数、Fugl-Meyer和恢复期Fugl-Meyer较治疗前升高(P<0.05),但组间比较差异均无统计学意义(P>0.05).结论 肉毒毒素能改善脑卒中亚急性期和恢复期肌肉痉挛和功能,但亚急性期治疗效果更明显.  相似文献
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Clonus can disrupt daily activities after spinal cord injury. Here an algorithm was developed to automatically detect contractions during clonus in 24 h electromyographic (EMG) records. Filters were created by non-linearly scaling a Mother (Morlet) wavelet to envelope the EMG using different frequency bands. The envelope for the intermediate band followed the EMG best (74.8-193.9 Hz). Threshold and time constraints were used to reduce the envelope peaks to one per contraction. Energy in the EMG was measured 50 ms either side of each envelope (contraction) peak. Energy values at 5% and 95% maximal defined EMG start and end time, respectively. The algorithm was as good as a person at identifying contractions during clonus (p = 0.946, n = 31 spasms, 7 subjects with cervical spinal cord injury), and marking start and end times to determine clonus frequency (intra class correlation coefficient, α: 0.949), contraction intensity using root mean square EMG (α: 0.997) and EMG duration (α: 0.852). On average the algorithm was 574 times faster than manual analysis performed independently by two people (p ≤ 0.001). This algorithm is an important tool for characterization of clonus in long-term EMG records.  相似文献
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目的探讨微血管减压术对手术疗效及并发症发生的影响。方法微血管减压手术治疗多种颅神经疾病965例,其中三叉神经痛482例,面肌痉挛461例,舌咽神经痛15例,蝶腭神经痛2例,耳鸣5例,通过此手术早期和后期并发症发生情况的比较,观察手术方法对并发症和疗效的影响。结果本组三叉神经痛患者手术有效率为97.3%,面肌痉挛手术有效率为96.3%,舌咽神经痛、蝶腭神经痛、耳鸣手术有效率为100%,手术方法的改良显著地减少了手术并发症的发生。结论微血管减压手术是对多种颅神经疾患有效。病人的选择(手术指征),手术技巧对手术疗效和并发症的有重要意义。  相似文献
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Tolperisone, a piperidine derivative, is assigned to the group of centrally acting muscle relaxants and has been in clinical use now for decades. The review summarizes the known pharmacokinetics, pharmacodynamics, toxicology and side effects in humans and the clinical use of tolperisone. A future perspective for further exploration of this drug is given.  相似文献
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Introduction: Muscle cramping is a common symptom in amyotrophic lateral sclerosis (ALS) that lacks efficacious treatment. The natural history of this symptom is unknown, which hampers efforts to design optimal clinical trials. Methods: We surveyed early stage ALS patients about their experience with cramps each month by phone for up to 21 months. Results: Cramps developed in 95% of patients over the course of their disease. The number of cramps experienced by an individual varied widely from month‐to‐month and trended lower after the first year of illness (P = 0.26). Those with limb‐onset and age >60 years had more cramps than bulbar‐onset (P < 0.0001) and younger patients (P < 0.0001). Conclusions: The high variability of the number of cramps experienced suggests that clinical trials will need to use crossover designs or large numbers of participants, even when the treatment effect is substantial. Muscle Nerve 53 : 513–517, 2016  相似文献
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