Abstract
Orakifar N, Kamali F, Pirouzi S, Jamshidi F. Sacroiliac joint manipulation attenuates
alpha-motoneuron activity in healthy women: a quasi-experimental study.
Objective
To determine whether sacroiliac joint (SIJ) manipulation decreases α-motoneuron activity
and increases the pressure pain threshold (PPT) over the posterior superior iliac
spine (PSIS) in healthy women.
Design
Quasi-experimental study.
Setting
A university medical center.
Participants
Healthy young women (N=20) aged 18 to 30 years were recruited from among the students
of a university medical center after a request for volunteers.
Interventions
Joint manipulation consisted of the supine rotational glide manipulation for the sacroiliac
region. PPT measurements from the PSIS and Hoffman-reflex (H-reflex) amplitudes from
the tibial nerve on the same side were recorded before and after joint manipulation.
PPT was monitored for 15 minutes and H-reflex for 20 minutes after the procedure.
Main Outcome Measures
Changes in tibial nerve H-reflex amplitude and PPT values after SIJ manipulation.
Results
SIJ manipulation attenuated α-motoneuronal activity significantly (P<.05) but transiently, since the decrease was seen only for 20 seconds after the intervention.
There was no positive significant difference in the PPT after SIJ manipulation at
any time during postintervention follow-up.
Conclusions
SIJ manipulation produced a transient attenuation of α-motoneuron excitability in
healthy women. These findings demonstrate that our manipulation technique can lead
to a short-term reduction in muscle tone as a result of changes in sensory discharge,
predominantly in la afferents. SIJ manipulation did not significantly affect the PPT
in healthy women.
Key Words
List of Abbreviations:
ANOVA (analysis of variance), H-reflex (Hoffmann reflex), HMax (maximal peak to peak H-reflex amplitude), M wave (muscle response wave), H/M (H-reflex and M wave amplitude ratio), H/MMax (maximal H-reflex and M wave amplitude ratio), HVLAT (high-velocity, low-amplitude thrust), ICC (intraclass correlation coefficient), PPT (pressure pain threshold), PSIS (posterior superior iliac spine), RM-MANOVA (repeated-measure multivariate analysis of variance), SIJ (sacroiliac joint), SM (spinal manipulation)To read this article in full you will need to make a payment
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Article info
Footnotes
Supported by the Vice-Chancellory for Research, Shiraz University of Medical Sciences (grant no. 88-4918).
No commercial party having a direct financial interest in the results of the research supporting this article has or will confer a benefit on the authors or on any organization with which the authors are associated.
Reprints are not available from the authors. Reprints are not available from the authors.
Identification
Copyright
© 2012 American Congress of Rehabilitation Medicine. Published by Elsevier Inc. All rights reserved.
