Skip to main content

Table 3 Normalized differences in peak electromyographic responses associated with two cervical and upper thoracic spinal manipulations delivered following one another in quick succession in asymptomatic and symptomatic participants

From: Differences in force-time parameters and electromyographic characteristics of two high-velocity, low-amplitude spinal manipulations following one another in quick succession

   Left Right
   Glut Lats Long MidT PDelt SCM Splen UppT Glut Lats Long MidT PDelt SCM Splen UppT
Asymptomatic 1 0.0082+± 0.0106# 0.0044 ± 0.0030 0.0334 ± 0.0437 0.0565 ± 0.0648 0.0198 ± 0.0314 0.1276 ± 0.1425 0.0550 ± 0.0328 0.0533 ± 0.0565 0.0088 ± 0.0107 0.0135 ± 0.0071 0.0442 ± 0.0606 0.0670 ± 0.0859 0.0199 ± 0.0227 0.1821 ± 0.2006 0.0547 ± 0.0315 0.0532 ± 0.0525
2 0.0103 ± 0.0115 0.0054 ± 0.0035 0.0580 ± 0.0632 0.0753 ± 0.0852 0.0162 ± 0.0178 0.1399 ± 0.1783 0.0532 ± 0.0164 0.0433 ± 0.0539 0.0137 ± 0.0179 0.0176 ± 0.0117 0.0708 ± 0.0814 0.0699 ± 0.0709 0.0141 ± 0.0132 0.1752 ± 0.2355 0.0676 ± 0.0396 0.0732 ± 0.0734
% diff 25.10 20.99 73.60*
p = 0.002
33.32 −17.89 9.61 −3.30 −18.73 55.08 30.60 60.16 4.28 −28.99 −3.81 23.60 37.57
Symptomatic 1 0.0028 ± 0.0024 0.0096 ± 0.0090 0.0167 ± 0.0202 0.0138 ± 0.0159 0.0071 ± 0.0048 0.0452 ± 0.0419 0.0222 ± 0.0178 0.0342 ± 0.0819 0.0027 ± 0.0016 0.0108 ± 0.0122 0.0147 ± 0.0176 0.0206 ± 0.0365 0.0054 ± 0.0076 0.0295 ± 0.0252 0.0205 ± 0.0124 0.0183 ± 0.0298
2 0.0031 ± 0.0022 0.0107 ± 0.0093 0.0243 ± 0.0301 0.0160 ± 0.0147 0.0084 ± 0.0079 0.0547 ± 0.0479 0.0275 ± 0.0246 0.0322 ± 0.0619 0.0031 ± 0.0023 0.0129 ± 0.0170 0.0182 ± 0.0218 0.0202 ± 0.0241 0.0057 ± 0.0057 0.0345 ± 0.0357 0.0236 ± 0.0148 0.0297 ± 0.0448
% diff 9.51 11.32 45.87*
p < 0.001
15.78 17.96 20.79 23.96 −5.99 16.27*
p = 0.005
20.03 24.24*
p < 0.001
−2.19 6.46 17.27 15.11 62.04*
p < 0.001
  1. Glut gluteus maximus, Lats latissimus dorsi, Long longissimus thoracis, MidT middle trapezius, PDelt posterior deltoid, SCM sternocleidomastoid, Splen splenius cervicis, UppT upper trapezius
  2. + raw value in mV
  3. # standard deviation
  4. diff: normalized difference between thrust 1 and 2
  5. * difference between thrusts significant (p < 0.05)