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Changes of eyebrow muscle activity with aging: functional analysis revealed by electromyography

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Affiliated Author(s)
손대구김준형한기환이소영
Alternative Author(s)
Son, Dae GuKim, Jun HyungHan, Ki HwanLee, So Young
Journal Title
Plastic and Reconstructive Surgery
ISSN
0032-1052
Issued Date
2014
Abstract
Background: This study evaluated the activity of the frontalis muscle, the corrugator
supercilii muscle, and the orbicularis oculi muscle according to eyebrow
movement and aging.
Methods: Two random cohorts of women aged 20 to 30 years (young group,
n = 20; mean age, 24.8 years) and 50 to 70 years (old group, n = 20; mean age,
55.8 years) were recruited prospectively. Surface electromyography was used
to evaluate motor unit action potential for each muscle in each of six eyebrow
movements. Details on statistical analysis are described in the text.
Results: In both age groups, corrugator supercilii muscle activity was the highest
for all six movements. Frontalis muscle activity was highest with maximal
frowning but not with maximal eye opening. Orbicularis oculi muscle activity
was significantly greater in the older age group than in the younger age group
for most actions. When the motion proportion of each muscle was compared,
the respective orbicularis oculi muscle and corrugator supercilii muscle indices
were higher in the older age group than in the young group.
Conclusions: Eyebrows are maintained by the dynamic balance of frontalis,
corrugator supercilii, and orbicularis oculi muscles, and various combinations
of motor recruitment of these muscles determine the eyebrow position and
shape. For youthful eyebrows, attenuation of the depressor muscle may restore
the muscle balance in treatments for eyebrow rejuvenation. (Plast. Reconstr.
Surg. 133: 455e, 2014.)
Department
Dept. of Plastic Surgery (성형외과학)
Dept. of Rehabilitation Medicine (재활의학)
Institute for Medical Science (의과학연구소)
Publisher
School of Medicine
Citation
Sangho Yun et al. (2014). Changes of eyebrow muscle activity with aging: functional analysis revealed by electromyography. Plastic and Reconstructive Surgery, 133(4), 455e–463e. doi: 10.1097/PRS.0000000000000052
Type
Article
ISSN
0032-1052
DOI
10.1097/PRS.0000000000000052
URI
https://kumel.medlib.dsmc.or.kr/handle/2015.oak/33676
Appears in Collections:
1. School of Medicine (의과대학) > Dept. of Plastic Surgery (성형외과학)
1. School of Medicine (의과대학) > Dept. of Rehabilitation Medicine (재활의학)
3. Research Institutues (연구소) > Institute for Medical Science (의과학연구소)
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