Conable Katharine, Corneal John, Hambrick Terry, Marquina Nelson, Zhang John
Logan College of Chiropractic, Chesterfield, MO 63006-1065, USA.
J Manipulative Physiol Ther. 2006 May;29(4):305-14. doi: 10.1016/j.jmpt.2006.03.002.
The objective of the study was to compare force curves and surface electromyogram from examiners and subjects during manual muscle testing with 3 examiner-identified variants of manual muscle testing (MMT)-examiner-started (ESMMT), patient-started (PSMMT), and undifferentiated/near-simultaneous (NSMMT).
Forty-two volunteer applied kinesiologist doctors tested 36 volunteer students, doctors, and spouses at a professional conference. Start-time difference between examiner and subject muscle contraction, peak force, time of peak force and duration of force was measured. Force and surface electromyogram from examiner and subject were recorded simultaneously during MMT of the middle deltoid muscle for each style of testing used in practice.
The congruence between examiner label and timing was as follows: ESMMT, 39%; PSMMT 61%; and NSMMT 28% within 50 milliseconds of simultaneous. Mean subject/examiner start-time difference differed significantly between PSMMT (-0.116 seconds) and both ESMMT (-0.018 seconds) and NSMMT (-0.0053 seconds). No clear cutoff between styles was evident. Peak force ranged from 0.548 to 23.615 lb (mean, 8.806 lb; SD, 4.543 lb), and all styles were significantly different. Duration of force ranged from 0.325 to 3.490 seconds (mean, 1.338 seconds; SD, 0.576 seconds), with NSMMT significantly shorter than ESMMT or PSMMT. The shape of force curves did not differ between styles of muscle testing, but differed between facilitated vs inhibited tests.
In this group of doctors, neither start-time difference nor the shape of force curves distinguished styles of MMT. Differences in peak force and test duration may account for differences in outcomes when examiners purposely vary their muscle testing style.
本研究的目的是比较在手动肌力测试过程中，检查者和受试者的力曲线及表面肌电图，测试采用检查者确定的3种手动肌力测试（MMT）变体——检查者启动（ESMMT）、患者启动（PSMMT）和未分化/近似同时启动（NSMMT）。
42名志愿应用运动机能学医生在一次专业会议上对36名志愿学生、医生和配偶进行测试。测量检查者和受试者肌肉收缩的起始时间差异、峰值力、峰值力出现时间和力的持续时间。在实际使用的每种测试方式下，对三角肌中部进行MMT时，同时记录检查者和受试者的力及表面肌电图。
检查者标记与时间的一致性如下：ESMMT在同步的50毫秒内为39%；PSMMT为61%；NSMMT为28%。受试者/检查者平均起始时间差异在PSMMT（-0.116秒）与ESMMT（-0.018秒）和NSMMT（-0.0053秒）之间有显著差异。各测试方式之间没有明显的界限。峰值力范围为0.548至23.615磅（平均8.806磅；标准差4.543磅），且所有测试方式均有显著差异。力的持续时间范围为0.325至3.490秒（平均1.338秒；标准差0.576秒），NSMMT明显短于ESMMT或PSMMT。不同肌肉测试方式的力曲线形状没有差异，但在易化测试与抑制测试之间存在差异。
在这组医生中，起始时间差异和力曲线形状均不能区分MMT的测试方式。当检查者有意改变其肌肉测试方式时，峰值力和测试持续时间的差异可能导致结果的不同。
