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 4

Time Required to Return to 95% of Baseline MF & MIF After Pulstar MAM
Time required to return to 95% of baseline mean frequency (MF) and mean instantaneous frequency (MIF) discharge for a minimum of 1s following Pulstar mechanical-assisted manipulation (MAM). Different subpopulations of spindle afferents appear to exist according to the time required to return to MF/MIF baseline. The reported values are the percentage of afferents returning to MF/MIF baseline discharge for the respective time period.

Mean Frequency (MF) Mean Instantaneous Frequency (MIF)
Force

Time (s) 22N
(n=18) 44N
(n=18) 67N
(n=15) 22N
(n=18) 44N
(n=18) 67N
(n=15)
0 – 1.99 11% 0% 13% 39% 22% 13%
2 – 3.99 17% 11% 7% 22% 33% 33%
4 – 5.99 28% 11% 0% 28% 17% 20%
6 – 7.99 5% 17% 20% 0% 11% 7%
8 –10 5% 5% 13% 5% 6% 0%
>10 34% 56% 47% 6% 11% 27%

	Mean Frequency (MF)			Mean Instantaneous Frequency (MIF)
Force Time (s)	22N (n=18)	44N (n=18)	67N (n=15)	22N (n=18)	44N (n=18)	67N (n=15)
0 – 1.99	11%	0%	13%	39%	22%	13%
2 – 3.99	17%	11%	7%	22%	33%	33%
4 – 5.99	28%	11%	0%	28%	17%	20%
6 – 7.99	5%	17%	20%	0%	11%	7%
8 –10	5%	5%	13%	5%	6%	0%
>10	34%	56%	47%	6%	11%	27%