TY  - GEN
Y1  - 2022/12/18/
T3  - Advances in Experimental Medicine and Biology
TI  - Upper trapezius muscle tonicity, assessed by palpation, relates to change in tissue oxygenation and structure as measured by Time-Domain Near Infrared Spectroscopy
SP  - 417
PB  - Springer
N1  - This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions.
CY  - Switzerland, Cham
ID  - discovery10166604
KW  - Science & Technology
KW  -  Life Sciences & Biomedicine
KW  -  Medicine
KW  -  Research & Experimental
KW  -  Physiology
KW  -  Research & Experimental Medicine
KW  -  Tissue oxygen saturation (StO(2))
KW  -  NIRS
KW  -  Myofascial trigger points
KW  -  Haemodynamics
AV  - public
N2  - Palpation is a diagnostic tool widely used by manual therapists despite its disputed reliability and validity. Previous studies have usually focused on the detection of myofascial trigger points (MTrPs), i.e., the points within muscles thought to have undergone molecular composition, oxygenation and structural changes, altering their tonicity. Time-domain near-infrared spectroscopy (TD-NIRS) could provide new insights into soft tissue oxygenation and structure, in order to objectively assess the validity and reliability of palpation. This pilot study aims at (1) assessing the ability of TD-NIRS to detect a difference between palpably normal and hypertonic upper trapezius (UT) muscles, and (2) to estimate the reproducibility of the TD-NIRS measurement on UT muscles. TD-NIRS measurements were performed on 4 points of the UT muscles in 18 healthy participants (10F, mean age: 27.6 years), after a physical examination by a student osteopath to locate these points and identify the most and least hypertonic. From TD-NIRS, the most hypertonic points had a higher concentration in deoxy- ([HHb]) (0.887 ± 0.253 ?M, p < 0.001) and total haemoglobin ([HbT]) (1.447 ± 0.772 ?M, p < 0.001), a lower tissue oxygen saturation (StO2) (?0.575 ± 0.286%, p < 0.001), and a greater scattering amplitude factor (AF) (0.2238 ± 0.1343 cm?1, p = 0.001) than the least hypertonic points. Moreover, the intraclass correlation coefficient one-way random-effects model (ICC (1,1)) calculated for each TD-NIRS parameter and for each point revealed an excellent reliability of the measurement (Mean ± SD, 0.9253 ± 0.0678). These initial results, showing that changes in TD-NIRS parameters correlate with changes in muscle tonicity as assessed by palpation, are encouraging and show that TD-NIRS could help to further assess the validity of palpation as a diagnostic tool in manual therapy.
EP  - 421
A1  - Buot, Audrey
A1  - Brownhill, Kevin
A1  - Lange, Frédéric
UR  - https://doi.org/10.1007/978-3-031-14190-4_68
ER  -