Effects of movement imitation training in Parkinson's disease: A virtual reality pilot study

BackgroundHypometria is a clinical motor sign in Parkinson's disease. Its origin likely emerges from basal ganglia dysfunction, leading to an impaired control of inhibitory intracortical motor circuits. Some neurorehabilitation approaches include movement imitation training; besides the effects of motor practice, there might be a benefit due to observation and imitation of un-altered movement patterns. In this sense, virtual reality facilitates the process by customizing motor-patterns to be observed and imitated.ObjectiveTo evaluate the effect of a motor-imitation therapy focused on hypometria in Parkinson's disease using virtual reality.MethodsWe carried out a randomized controlled pilot-study. Sixteen patients were randomly assigned in experimental and control groups. Groups underwent 4-weeks of training based on finger-tapping with the dominant hand, in which imitation was the differential factor (only the experimental group imitated). We evaluated self-paced movement features and cortico-spinal excitability (recruitment curves and silent periods in both hemispheres) before, immediately after, and two weeks after the training period.ResultsMovement amplitude increased significantly after the therapy in the experimental group for the trained and un-trained hands. Motor thresholds and silent periods evaluated with transcranial magnetic stimulation were differently modified by training in the two groups; although the changes in the input–output recruitment were similar.ConclusionsThis pilot study suggests that movement imitation therapy enhances the effect of motor practice in patients with Parkinson's disease; imitation-training might be helpful for reducing hypometria in these patients. These results must be clarified in future larger trials.     

精子蛋白SP22研究进展

精子蛋白SP22是一种与多种疾病相关并广泛表达于各种组织的多功能蛋白。SP22定位于精子表面,具有酶活性,能够辅助精子穿入卵子,在ras因子共同作用下具有致癌活性。各物种中SP22高度保守,说明它对生命的重要性。目前对SP22与男性不育、帕金森病的关系研究较多。本文综述了SP22在基因结构、蛋白结构、功能特性等方面的最新研究进展。     

肿瘤干细胞的研究进展

肿瘤具有异质性的特征,随着研究的深入,越来越多的证据提示肿瘤组织中也存在少量具有干细胞性质的肿瘤干细胞,于是人们在此基础上提出了肿瘤干细胞学说,肿瘤干细胞已成为当今肿瘤研究领域的热点。目前,已经从白血病、脑肿瘤、乳腺癌、恶性黑色素瘤及前列腺癌等多种恶性肿瘤中初步分离鉴定出肿瘤干细胞。肿瘤干细胞学说的提出,使得靶向性杀伤肿瘤干细胞从而根治肿瘤成为可能。     

穴位注射灯盏细辛注射液对缺血中风恢复期血液流变学和肢体功能的影响

目的运用血海穴穴位注射灯盏细辛注射液与传统针灸结合促进和加快肢体功能康复,并运用现代生物化学方法观察其对血液流变学相关指标的影响。方法将符合选择标准的60例缺血性中风患者随机分为治疗组和对照组,治疗组采取灯盏细辛注射液穴位注射血海穴为主,对照组采用生理盐水穴位注射血海穴为空白对照,两组同时采用针刺治疗。治疗前后采用改良的Fugl-Meyer肢体综合功能评分表、Barthel指数量表及神经功能对两组的临床疗效进行评定。并检测血液流变学各项指标,最后进行统计学处理与分析。结果运用Fugl-Meyer肢体综合功能评分及Barthel指数分值及血液流变学主要检测指标对治疗前后疗效评价有非常显著的改善,且治疗组的疗效优于对照组。治疗组和对照组治疗前后血小板聚集率经统计学处理无统计学意义。结论灯盏细辛注射液穴位注射血海穴治疗缺血性中风对肢体功能和神经功能的改善具有非常良好的疗效。可降低血液流变学的指标,对患者血小板聚集率没有显著影响。     

神门、三阴交穴位配伍改善失眠症患者焦虑、抑郁状态：随机对照研究

目的:观察电针神门、三阴交对失眠症患者焦虑、抑郁状态的影响,并探索其配伍效应的作用机制。方法:将90例失眠症患者随机分为配伍组、神门组和三阴交组,每组30例,并进一步筛选出37例焦虑状态患者(配伍组12例、神门组13例、三阴交组12例)和42例抑郁状态患者(配伍组14例、神门组14例、三阴交组14例)。配伍组、神门组、三阴交组分别予电针神门-三阴交、神门单穴及三阴交单穴,疏密波,频率5 Hz/25 Hz,治疗每次30 min,每天1次,连续治疗5 d为一疗程,共治疗2个疗程。分别于治疗前后评定各组患者失眠严重程度指数(ISI)、焦虑自评量表(SAS)和抑郁自评量表(SDS)评分,检测血清多巴胺(DA)和去甲肾上腺素(NE)含量。结果:与治疗前比较,治疗后3组患者ISI、SAS、SDS评分均降低(P<0.05),配伍组ISI评分低于神门组(P<0.05)。治疗后,3组失眠症焦虑状态患者ISI、SAS评分及血清DA含量均较治疗前下降(P<0.05),配伍组、神门组患者血清NE较治疗前下降(P<0.05);配伍组、神门组患者SAS评分、血清NE含量及配伍组ISI评分低...     

Impact of the supine position versus left horizontal position on colonoscopy insertion: a 2-center,randomized controlled trial

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iRoot SP的特性及根管封闭剂超充的研究进展

根管治疗效果与根管封闭剂密切相关,而在充填过程中,很可能存在根管封闭剂超充填的情况。商品化的根管封闭剂种类众多,iRoot SP作为一种新型生物陶瓷类根管封闭剂,因具有良好的生物相容性、封闭性和抗菌性而逐渐被重视,其超充是否会影响患牙的预后也引起了关注。本文总结了iRoot SP理化及生物学性能,以及根管封闭剂超充填的研究进展,结合随访病例分析iRoot SP超充的预后情况。     

Implant placement for patients with cleft lip and palate: A clinical report and guidelines for treatment

The multidisciplinary teams involved in the treatment of individuals with cleft lip and palate are challenged when implants are indicated in the cleft area. Difficulties include obtaining a healthy peri-implant area and, especially, obtaining the natural-looking papilla essential for esthetic success. The area affected by the cleft has a bone deficiency, which is typically augmented with an alveolar bone graft at adolescence. Guidelines for the 3-dimensional placement of implants at the cleft area are presented based on clinical reports. The patients were followed up for at least 1 year. Adoption of the proposed guidelines enables satisfactory esthetic and functional outcomes in patients with cleft lip and palate.