共查询到16条相似文献,搜索用时 171 毫秒
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目的:研究平山病在颈椎过屈位MRI及颈椎X线侧位片的影像学表现。方法:对23例平山病患者和12例健康志愿者进行过屈位MRI扫描,18例平山病患者颈椎侧位X线片,总结影像学特点。结果:①病例组相邻两椎体后缘角度总体比较有差异,AC5-6最大。②病例组23例(100%)均出现低位颈髓的萎缩。③病例组23例(100%)出现低位脊髓变扁。④脊髓受累分布,C6 23例,C5 18例,C7 11例,C4 1例。⑤C6水平颈髓前后径与对照组相比明显变窄。⑥病例组14例(61%)出现低位颈椎椎管内硬膜后方T2WI异常信号。⑦颈椎曲度变直8例(44%),反弓7例(39%),前凸3例(17%)。结论:颈椎过屈位MRI对诊断平山病有重要意义,颈椎侧位X线曲度异常对平山病有辅助诊断价值。 相似文献
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目的探讨平山病患者自然位和过屈位时颈椎MRI影像学表现及过屈位脊膜后间隙大小对平山病诊断价值。材料与方法对9例临床确诊为平山病患者和10名健康志愿者行自然位和过屈位MR扫描,观察其影像学表现,测量过屈位平山病和对照组脊膜后间隙大小。结果自然位平山病患者颈椎曲度异常,低位脊髓出现萎缩、扁平。过屈位时颈髓前移、变扁,脊膜后间隙出现异常信号,增强后显著强化。平山病和对照组过屈位脊膜后间隙分别为(6.8±0.5 mm)和(4.2±0.4)mm,差异有统计学意义(P<0.01)。结论平山病患者过屈位颈椎脊膜后间隙增宽并见异常信号,结合自然位和过屈位MRI影像学特点可协助诊断。 相似文献
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张姗姗 《影像研究与医学应用》2020,(2):118-119
目的:探讨3.0TMRI对平山病的诊断价值。方法:收集我院临床及影像证实的9例平山病的病例,分析其磁共振影像特征及发病机制。结果:9例平山病患者均为青年男性,临床表现为上肢前臂或手肌肉萎缩、寒冷麻痹;屈颈位MRI均显示下段颈髓受压前移、变细,5例患者伴颈髓信号异常,9例均显示背侧硬膜外间隙增宽及LOA征象,增宽的硬膜外间隙内见扩张血管影。结论:平山病具有特征性的MRI影像表现,颈椎MRI过屈位是诊断平山病最佳的影像检查手段。 相似文献
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目的 观察平山病患者颈部正常位及过屈位的上下肢体感诱发电位(somatosensory evoked potential,SEP)是否有异常.方法 分别对平山病(平山病组)4例及健康者(正常对照组)4例进行颈部正常位及过屈位时正中神经和胫神经的SEP检测.结果 N13电位在过屈位时波幅在平山病组及正常对照组分别为(2.53±0.74)μV vs(4.13±1.12) μV(P <0.01),N13潜伏期在正常位时在两组分别为(12.56±0.32) ms vs (11.78±0.53) ms(P<0.01).平山病组和正常对照组P1正常位波幅为(1.33±0.59) μV vs (2.73±1.74)μV(P<0.05);过屈位波幅为(1.23±0.78)μV vs (2.51±1.52) μV(P <0.05).而两组在N13正常位波幅、过屈位潜伏期和P1正常位和过屈位的潜伏期,均未发现差异有统计学意义.结论 平山病患者可出现感觉通路的轻度受损. 相似文献
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目的:通过分析平山病的磁共振成像(MRI)表现特点和结合文献复习,提高其诊断水平。方法:报道1例经临床证实的平山病患者的MRI表现,并复习文献,探讨MRI表现的相关发病机制及病理解剖基础。结果:采用西门子Sonata1.5T磁共振机,先取生理状态下颈椎MRI检查,显示脊髓前角非对称性萎缩和脊髓背侧硬膜外静脉丛扩张;再行屈颈状态下MRI检查,可见颈髓的硬脊膜后壁向前推移,下段颈髓局限受压变细征。结论:平山病有特征性MRI表现,结合临床、常规位和功能位屈颈状态的MRI检查,可以提示平山病。 相似文献
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《临床和实验医学杂志》2017,(12)
目的探讨动态MRI测量颈椎管内容、椎体及椎间盘的动态变化在过伸颈椎损伤发生中的应用价值,为临床诊治过伸颈椎损伤提供有效依据。方法选取2014年1月到2015年12月期间接受治疗的过伸颈椎损伤患者44例,对患者先进行MRI扫描检查,再进行过伸、过屈位扫描。观察患者动态测量不同位置C3-7节段的脊髓、硬膜囊中矢径、硬膜囊前间隙及椎体、椎管矢径。结果高位颈椎(C4以上)脊髓、硬膜囊中矢径在三位置下差异无统计学意义(P=0.095)。C4以下脊髓、硬膜囊中矢径的差异有统计学意义(P=0.024)。在椎体水平在三位置中测得的中矢径数值大小排列次序为:过伸位中立位过屈位;因突出或膨出椎间盘、退行性变及黄韧带等因素的影响在椎间隙水平三位置中测得的中矢径数值大小则相反为:过屈位中立位过伸位,且差异有统计学意义(P=0.018)。而硬膜囊前间隙三位置中测得的中矢径数值大小无显著性差异(P=0.082)。结论对于过伸颈椎损伤诊断,动态MRI扫描具有快速、有效、分辨率高及特异性好的临床效果,能为手术提供帮助,具有较高的临床应用价值。 相似文献
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目的比较颈椎屈曲不同角度平山病患者的MRI表现,探讨颈椎屈曲角度的调节对平山病的MRI诊断价值。材料与方法 19例临床确诊为平山病的患者,使用自行研发的辅助诊断设备行不同屈曲位颈椎MRI检查,屈曲角度包括:0°(中立位)、25°、30°、35°、40°,观察不同屈曲位MRI三个典型征象显示情况:脊髓萎缩、背侧硬脊膜前移、硬膜外间隙增宽。测量不同屈曲角度硬膜外间隙最大矢状径(d)及同层面椎管矢状径(D),并计算d/D。结果平山病患者MRI特异性征象在屈曲角度25°及以上与屈曲0°存在差异(P=0.00),d/D平均值随屈曲角度增加在一定范围内增加,35°时最大。结论屈曲位MRI检查可以影响颈椎背侧硬脊膜前移、脊髓萎缩、硬膜外间隙增宽等征象。 相似文献
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回顾性分析10例经临床确诊的平山病患者资料。结果平山病以青年男性多见,临床表现为单/双侧上肢远端无力伴肌萎缩,无感觉障碍;肌电图呈神经源性异常;颈MRI示下颈髓轻度萎缩,过屈颈位颈髓程度不等受压前移,硬膜囊后间隙增宽,硬膜外新月形或条状高信号,多数可见血管流空影,增强扫描新月形信号影有强化。根据肌电图和过屈颈位MRI检查的特异性表现结合临床特点可对平山病做出早期临床诊断。 相似文献
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目的探讨平山病的屈曲位MR影像学特征及其病理学机制。方法回顾性分析临床确诊为平山病的31例患者的颈椎屈曲位MRI表现,其中10例同期行过伸和屈曲位MR检查。结果31例患者均出现低位颈髓的萎缩变扁;其中非对称性变扁28例,对称性变扁3例;下段颈髓T2WI异常高信号患者4例;所有病例出现硬脊膜外后间隙增宽,其中29例T2WI砸示增宽的硬膜外后间隙内出现小流空信号,10例同期行过伸、属曲位MRI检查者皆显示硬脊膜囊后肇前移。3例接受颈椎减压手术治疗的患者,术后显示:术前增宽的硬膜外后脂肪间隙恢复正常,其内的流空信号也消失。结论平山病的颈椎屈曲位MRI表现具有特征性,颈椎屈曲位MRI对平山病的早期诊断及其发病机制的探讨和治疗后随访具有重要价值。 相似文献
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This study reports on cervical magnetic resonance imaging (MRI) performed in the fully flexed position in 13 male patients with Hirayama disease and 12 normal controls (males). The anterior-posterior diameter of the cervical cord at the superior margin of the C6 vertebral body was measured, as well as the angle between adjacent cervical bodies. Localized lower cervical-cord atrophy, cord flattening and abnormal signals in the posterior epidural space were studied. Patients demonstrated an increased angle between C5 and C6, and C6 cord lesions. There were significant differences between patients and controls in localized lower cervical-cord atrophy and cord flattening. Many patients were found to have a crescent-shaped high-intensity mass on T2WI MRI and a low-intensity mass on T1WI MRI in the posterior epidural space. In patients, there were specific imaging features of Hirayama disease on fully flexed MRI. Cervical MRI in the fully flexed position has significant value in the clinical diagnosis of Hirayama disease. 相似文献
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平山病国内文献报道192例分析 总被引:7,自引:0,他引:7
目的:对平山病的临床特点、电生理、影像学、预后以及发病机制进行分析。方法:以“平山病”或“上肢肌萎缩”为主题词,以中国数字期刊总库和中华医学会数字化期刊为数据库,共检索167篇文献,剔除重复报道以及病例资料不全的文献,对22篇国内杂志发表及我院诊治的病例共192例患者的临床资料进行分析。结果:192例患者,男:女=6.7:t,起病年龄平均18.6岁。隐匿起病,表现多以一侧上肢远端肌肉无力伴肌萎缩,右侧多见,77.6%患者有伸指颤动,81.3%有寒冷麻痹。全部患者患肢肌电图运动单位电位时限延长,95.8%对侧上肢远端肌电图出现类似的改变。颈部自然位MRI44.3%发现低位颈髓萎缩,屈曲位均发现颈髓前移,硬脊膜后壁前移,硬脊膜外间歇增宽。病情在3~4年后处于稳定状态,部分患者经颈托治疗病情好转。结论:平山病是一种少见的良性自限性疾病,好发于青少年,主要表现上肢远端不对称肌萎缩,早期佩戴颈托可以阻止病情进展。 相似文献
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J.-P. Pialasse J.-D. Dubois M.-H. Pilon Choquette D. Lafond M. Descarreaux 《Annals of physical and rehabilitation medicine》2009,52(1):49-58
BackgroundThe cervical flexion–relaxation phenomenon (FRP) is a neck extensor myoelectric “silence” that occurs during complete cervical flexion. The aim of this study was to assess the presence of this phenomenon in the cervical region and to explore the kinematics and EMG parameters in two different experimental conditions.Patients and methodsNineteen young healthy adults (22.2 ± 2.4 years), without any cervical pain history, participated in this study and performed each of the experimental conditions. They had to accomplish a cervical flexion from a neutral seated position and from a 45° forward leaning seated position. Neck kinematics was assessed using a kinematic capture device in order to assess onset and cessation angle of the PFR. Cervical paraspinal and trapezius muscles EMG activities were also recorded. All data were compared in order to assess the differences between the two experimental conditions.ResultsEighteen of the nineteen subjects showed a FRP. The phenomenon appears between 72.6 and 76.3% of maximal cervical flexion and disappears during the return to neutral position between 91.9 and 93.1% of maximal cervical flexion. The FRP was observed, at least unilaterally, in 84.2% (67.4% bilaterally) of tasks without forward bending of trunk, and 90.5% (79.0% bilaterally) of tasks with 45° forward bending of trunk. A significant increase in the flexion–relaxation ratio was observed in the 45° forward leaning condition. No significant difference could be observed between the two experimental conditions for the kinematics parameters.ConclusionThe results of the present study indicate that cervical spine flexion in healthy subjects is characterized by a flexion–relaxation response. Moreover, the results indicate that trunk inclination might facilitate the evaluation of the cervical FRP. 相似文献