In:
PLOS ONE, Public Library of Science (PLoS), Vol. 17, No. 5 ( 2022-5-16), p. e0268533-
Abstract:
The purpose of this study is to assess and compare corticospinal excitability in the upper and lower trapezius and serratus anterior muscles in participants with and without shoulder impingement syndrome (SIS). Fourteen participants with SIS, and 14 without SIS were recruited through convenient sampling in this study. Transcranial magnetic stimulation assessment of the scapular muscles was performed while the participants were holding their arm at 90 degrees scaption. The motor-evoked potential (MEP), active motor threshold (AMT), latency of MEP, cortical silent period (CSP), activated area and center of gravity (COG) of cortical mapping were compared between groups using the Mann-Whitney U tests. The SIS group demonstrated following significances, higher AMTs of the lower trapezius (SIS: 0.60 ± 0.06; Comparison: 0.54 ± 0.07, p = 0.028) and the serratus anterior (SIS: 0.59 ± 0.04; Comparison: 0.54 ± 0.06, p = 0.022), longer CSP of the lower trapezius (SIS: 62.23 ± 22.87 ms; Comparison: 45.22 ± 14.64 ms, p = 0.019), and posteriorly shifted COG in the upper trapezius (SIS: 1.88 ± 1.06; Comparison: 2.76 ± 1.55, p = 0.048) and the serratus anterior (SIS: 2.13 ± 1.02; Comparison: 3.12 ± 1.88, p = 0.043), than the control group. In conclusion, participants with SIS demonstrated different organization of the corticospinal system, including decreased excitability, increased inhibition, and shift in motor representation of the scapular muscles.
Type of Medium:
Online Resource
ISSN:
1932-6203
DOI:
10.1371/journal.pone.0268533
DOI:
10.1371/journal.pone.0268533.g001
DOI:
10.1371/journal.pone.0268533.g002
DOI:
10.1371/journal.pone.0268533.g003
DOI:
10.1371/journal.pone.0268533.t001
DOI:
10.1371/journal.pone.0268533.t002
DOI:
10.1371/journal.pone.0268533.s001
DOI:
10.1371/journal.pone.0268533.s002
DOI:
10.1371/journal.pone.0268533.s003
DOI:
10.1371/journal.pone.0268533.s004
DOI:
10.1371/journal.pone.0268533.r001
DOI:
10.1371/journal.pone.0268533.r002
DOI:
10.1371/journal.pone.0268533.r003
DOI:
10.1371/journal.pone.0268533.r004
DOI:
10.1371/journal.pone.0268533.r005
DOI:
10.1371/journal.pone.0268533.r006
DOI:
10.1371/journal.pone.0268533.r007
DOI:
10.1371/journal.pone.0268533.r008
Language:
English
Publisher:
Public Library of Science (PLoS)
Publication Date:
2022
detail.hit.zdb_id:
2267670-3