Calancie B, Molano M R, Broton J G, Bean J A, Alexeeva N
The Miami Project to Cure Paralysis and the Department of Neurological Surgery, University of Miami School of Medicine, Florida, USA.
J Spinal Cord Med. 2001 Spring;24(1):19-25. doi: 10.1080/10790268.2001.11753550.
The purpose of this study was to compare the electromyography (EMG) score during contraction of a given muscle to the independently measured manual muscle test (MMT) score for that same muscle (or muscle group), to determine whether EMG measures could serve as a reasonable approximation of muscle contraction force in persons with acute spinal cord injury (SCI).
We examined the strength of relationship between surface-recorded EMG and estimated muscle strength using the MMT in a population of 45 subjects with acute (<1 week) traumatic SCI. Eight different muscle groups were compared in each individual; measures were repeated on these subjects approximately 2 months later. A 6-point numeric index was used for assignment of EMG scores, all of which were done in a blinded fashion by 1 investigator from tape-recorded evaluations.
Nearly all of the individual muscle comparisons led to positive and significant (P < .01) correlations between EMG and MMT scores, at both the acute and subacute time points following injury.
These findings support the use of EMG scoring as an indicator of recovery of volitional strength following SCI in a given subject. However, caution must be used when attempting to extrapolate EMG scores to absolute forces or when comparing EMG scores among different subjects.
本研究旨在比较特定肌肉收缩时的肌电图（EMG）评分与同一肌肉（或肌肉群）独立测量的徒手肌力测试（MMT）评分，以确定EMG测量是否可作为急性脊髓损伤（SCI）患者肌肉收缩力的合理近似值。
我们在45名急性（<1周）创伤性SCI患者中，使用MMT检查了表面记录的EMG与估计肌肉力量之间的关系强度。对每个个体的八个不同肌肉群进行了比较；大约2个月后对这些受试者重复测量。使用6分数字指数来分配EMG评分，所有评分均由一名研究人员根据录音评估以盲法进行。
几乎所有个体肌肉比较在损伤后的急性和亚急性时间点，EMG与MMT评分之间均呈正相关且具有显著性（P <.01）。
这些发现支持将EMG评分用作特定受试者SCI后意志力量恢复的指标。然而，在试图将EMG评分外推至绝对力量或比较不同受试者的EMG评分时必须谨慎。
