Characteristics of Paraspinal Muscle Spindle Response to
Mechanically-Assisted Spinal Manipulation-A Preliminary Report

William R Reed; Joel G Pickar; Randall S Sozio; Michael A.K. Liebschner; Joshua W. Little; Maruti R Gudavalli

doi:10.1016/j.jmpt.2017.03.006

Table 1

Neural Response Characteristics Following Activator V MAM
Shows the time required until the first action potential and the mean differences between mean frequency (MF) and mean instantaneous frequency (MIF) 2s after Activator V mechanical-assisted manipulation (MAM) and 2s baseline measures. All Activator V MAM thrusts resulted in a decrease in spindle discharge relative to baseline activity.

Time (s) to 1^st Action Potential After
MAM Change from Baseline During 2s After
MAM
Force
Setting 3

(n=8) Setting 1

(n=9) Setting 2

(n=12) Force
Setting 3

(n=8) Setting 1

(n=9) Setting 2

(n=12)
Mean Time (SEM) .054 (0.01) .465 (0.2) .607 (0.4) Mean MF (SEM) −2.2 (0.6) −6.0 (2.2) −3.9 (1.8)
Mean MIF (SEM) −2.1 (0.5) −6.6 (2.5) −4.0 (1.9)

Time (s) to 1^st Action Potential After MAM				Change from Baseline During 2s After MAM
Force Setting 3 (n=8)	Setting 1 (n=9)	Setting 2 (n=12)		Force Setting 3 (n=8)	Setting 1 (n=9)	Setting 2 (n=12)
Mean Time (SEM)	.054 (0.01)	.465 (0.2)	.607 (0.4)	Mean MF (SEM)	−2.2 (0.6)	−6.0 (2.2)	−3.9 (1.8)
Mean Time (SEM)	.054 (0.01)	.465 (0.2)	.607 (0.4)	Mean MIF (SEM)	−2.1 (0.5)	−6.6 (2.5)	−4.0 (1.9)