Article

OBJECTIVES: To determine (1) whether the shear modulus in upper trapezius muscle
myofascial trigger points (MTrPs) reduces acutely after dry needling (DN), and
(2) whether a change in posture from sitting to prone affects the shear modulus.
DESIGN: Ultrasound images were acquired in B mode with a linear transducer
oriented in the transverse plane, followed by performance of shear-wave
elastography (SWE) before and after DN and while sitting and prone. SETTING:
University. PARTICIPANTS: Women (N=7; mean age +/- SD, 46+/-17y) with palpable
MTrPs were recruited. INTERVENTION: All participants were dry needled in the
prone position using solid filament needles that were inserted and manipulated
inside the MTrPs. SWE was performed before and after DN in the sitting and prone
positions. MAIN OUTCOME MEASURE: MTrPs were evaluated by shear modulus using SWE.
RESULTS: Palpable reductions in stiffness were noted after DN and in the prone
position. These changes were apparent in the shear modulus map obtained with
ultrasound SWE. With significant main effects, the shear modulus reduced from
before to after DN (P<.01) and from the sitting to the prone position (P<.05). No
significant interaction effect between time and posture was observed.
CONCLUSIONS: The shear modulus measured with ultrasound SWE reduced after DN and
in the prone position compared with sitting, in agreement with reductions in
palpable stiffness. These findings suggest that DN and posture have significant
effects on the shear modulus of MTrPs, and that shear modulus measurement with
ultrasound SWE may be sensitive enough to detect these effects.
CI - Copyright (c) 2013 American Congress of Rehabilitation Medicine. Published by
Elsevier Inc. All rights reserved.

Langue : ANGLAIS