Faculdade de Medicina de São José do Rio Preto (FAMERP), Department of Neurological Sciences, Rua Luiz Antônio da Silveira 1661, 15025-020, São José do Rio Preto, São Paulo, Brazil.
Muscle Nerve. 2013 Mar;47(3):440-2. doi: 10.1002/mus.23710. Epub 2013 Feb 4.
Normative data for jitter parameters using a disposable concentric needle have been described in a few studies.
Jitter, expressed as the mean consecutive difference (MCD), was measured in the frontalis muscle in 20 subjects by voluntary contraction.
Mean MCD for individual studies (20, gaussian), all potentials (400, non-gaussian), and 18th highest value (20, gaussian) were 19.9 ± 2.9 μs, 19.9 ± 6.6 μs, and 26.9 ± 4.4 μs, respectively.
The suggested upper normal limit for mean MCD is 26 μs and for outliers is 36 μs.
使用一次性同心针已经描述了一些关于微颤参数的规范数据。
通过自愿收缩，在前额肌中测量了 20 个个体的微颤，表现为连续差异的平均值（MCD）。
各个研究（20，高斯）、所有电位（400，非高斯）和第 18 个最高值（20，高斯）的平均 MCD 分别为 19.9 ± 2.9 μs、19.9 ± 6.6 μs 和 26.9 ± 4.4 μs。
建议的平均 MCD 上限正常范围为 26 μs，异常值为 36 μs。
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