Medical Journal of the Islamic Republic Of Iran
مجله پزشکی جمهوری اسلامی ایران
Med J Islam Repub Iran
Medical Sciences
http://mjiri.iums.ac.ir
2
journal2
1016-1430
2251-6840
8
10.18869/mjiri
14
8888
13
en
jalali
1384
11
1
gregorian
2006
2
1
19
4
online
1
fulltext
en
VASTUS MEDIALIS OBLIQUE AND VASTUS LATERALISACTIVITIES RATIO ON SELECTED DEGREES OF RANGE OF MOTION IN OPEN AND CLOSED KINETIC CHAIN DURING ISOMETRIC CONTRACTION
Surgery
Surgery
Original Research: Clinical Science
Original Research: Clinical Science
Background: The purpose of this study was to investigate the ratio of Electromyography
(EM G) activities of the vastus medialis obliqus (VMO) and vastus lateralis
(VL) within seven angles of knee joint range of motion using isometric contraction in
open kinetic chain (OK C) and closed kinetic chain (CKC).
Methods: The dominant knees of 44 healthy female subjects (mean age: 24.84
with range: 20-30 years old) were analyzed. Surface electrode pairs were attached
over the VMO and VL by using Basmajian methods. The EMG biofeedback data was
collected while the subject performed isometric contraction on isometric and squat
exercise within 7 degrees (0° to 90°) with 15° intervals of knee flexion angle.
Results: Paired T-test andANOVA were performed between variables. Results
demonstrated that in this study there are significant differences: I) between OKC and
CKC exercise in 0°, 15°, and 30° ofknee flexion, II) between all angles in CKC
except: 0-15°,0-30°, 0-45°, 15-30°, 60-75°, and 75-90°, and III) between 15-60°,
30-60°, 45-60°, and 60-90° in OKC (p<O.OOl).
As a result in OKC and CKC respectively, 60° and 15° angles ofknee flexion
were most sufficient positions (i.e. increased VMONL activities ratios), -15° and 90°
ofknee flexion were the most insufficient positions and arc of movement between 45-
750 and 0-30° was considered as the most sufficient arc of movement.
Conclusion: As the result of this research and biomechanical and neuro-physiological
viewpoints, emphasized in the literature, our recommendations are: in early
phase or in early sessions of treatment of patellofemoral joint dysfunction, treatment
exercise done in CKC & sufficient position and after progression of the patient's condition,
OKC exercises could also be considered.
Patellofemoral Joint, Closed Kinetic Chain, Open Kinetic Chain, Electromyography
323
327
http://mjiri.iums.ac.ir/browse.php?a_code=A-10-298-15&slc_lang=en&sid=1
H
FARAHINI
20031947532846003197
20031947532846003197
No
GR
SHAH HUSSEINI
20031947532846003198
20031947532846003198
No
MJ
SHATERZADEH
20031947532846003199
20031947532846003199
No
I
EBRAHIMI TAKAMJANI
takamjan@tums.ac.ir
20031947532846003200
20031947532846003200
Yes
School of Rehabilitation, Tehran University of Medical Sciences and Health Services, Tehran, Iran
MS
GHASEMI
20031947532846003201
20031947532846003201
No