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Can the electrically stimulated manual muscle test differentiate upper from lower motor neuron injury in persons with acute SCI?
Neurological Research ( IF 1.9 ) Pub Date : 2020-09-24 , DOI: 10.1080/01616412.2020.1824417
Ashley de Padua 1 , Cassandra Renfro 2 , Maria Grabnar 3 , Kevin Kilgore 3, 4 , Anne Bryden 3 , Mary Joan Roach 3, 4, 5 , Greg Nemunaitis 6
Affiliation  

ABSTRACT

Objective

To determine if the motor response on the stimulated manual muscle test (SMMT) in muscles with a grade 0 motor score on the manual muscle test (MMT) can differentiate lower motor neuron (LMN) from upper motor neuron (UMN) injury based on the presence of spontaneous activity (SA) with needle EMG.

Design

Prospective Study.

Participants/Methods

Twenty-one subjects with acute traumatic cervical SCI.

Methods

An upper extremity International Standards for Neurological Classification of Spinal Cord Injury (ISNCSCI) evaluation was completed on all subjects. A needle EMG and an electrically stimulated manual muscle test (SMMT) were completed on all key upper extremity muscles with a MMT motor score of zero.

Results

The MMT, SMMT and Needle EMG were done on 77 muscles. The SMMT motor score was 0 on 10 muscles and >1 on 67 muscles. The needle EMG identified spontaneous activity (SA) in 55/77 muscles. Seventy percent (7/10) of the muscles with MMT and SMMT motor score of zero demonstrated SA on EMG. Seventy-two percent (48/67) of the muscles with MMT motor score = 0 and SMMT motor score ≥1 demonstrated SA on EMG.

Conclusion

In our study, 70% of the muscles with a SMMT motor response of zero and 72% of the muscles with a SMMT motor response greater than or equal to one demonstrated SA on EMG. The use of the SMMT as a clinical measure to differentiate LMN from UMN integrity may be limited when applied.



中文翻译:

电刺激手动肌肉测试能否区分急性 SCI 患者的上运动神经元损伤和下运动神经元损伤?

摘要

客观的

确定手动肌肉测试 (MMT) 运动评分为 0 级的肌肉在刺激手动肌肉测试 (SMMT) 上的运动反应是否可以根据以下情况区分下运动神经元 (LMN) 和上运动神经元 (UMN) 损伤针肌电图显示自发活动 (SA)。

设计

前瞻性研究。

参与者/方法

21 名患有急性创伤性颈椎 SCI 的受试者。

方法

所有受试者均完成了脊髓损伤神经学分类上肢国际标准 (ISNCSCI) 评估。对所有关键上肢肌肉完成了针肌电图和电刺激手动肌肉测试 (SMMT),MMT 运动评分为零。

结果

对 77 块肌肉进行了 MMT、SMMT 和针肌电图检查。10 块肌肉的 SMMT 运动评分为 0,67 块肌肉的 SMMT 运动评分 >1。针 EMG 识别出 55/77 块肌肉的自发活动 (SA)。百分之七十 (7/10) 的 MMT 和 SMMT 运动评分为零的肌肉在 EMG 上表现出 SA。MMT 运动评分 = 0 且 SMMT 运动评分≥1 的肌肉中有 72% (48/67) 在 EMG 上显示出 SA。

结论

在我们的研究中,70% 的 SMMT 运动反应为零的肌肉和 72% 的 SMMT 运动反应大于或等于 1 的肌肉在 EMG 上表现出 SA。使用 SMMT 作为区分 LMN 与 UMN 完整性的临床措施在应用时可能会受到限制。

更新日期:2020-09-24
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