scholarly journals Central Tendon Injury Impairs Regional Neuromuscular Activation of the Rectus Femoris Muscle

Sports ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 150
Author(s):  
Yoshiaki Kubo ◽  
Kohei Watanabe ◽  
Koichi Nakazato ◽  
Koji Koyama ◽  
Kenji Hiranuma
Keyword(s):  
Functional Role ◽  
Rectus Femoris ◽  
Tendon Injury ◽  
Proximal Region ◽  
Neuromuscular Activation ◽  
Injured Region ◽  
History Of ◽  
Hip Flexion ◽  
Rectus Femoris Muscle ◽  
Femoris Muscle

We aimed to uncover which rectus femoris strain injury types affect regional activation within the rectus femoris. The rectus femoris has a region-specific functional role; the proximal region of the rectus femoris contributes more than the middle and distal regions during hip flexion. Although a history of strain injury modifies the region-specific functional role within the rectus femoris, it was not obvious which rectus femoris strain injury types affect regional activation within it. We studied 12 soccer players with a history of rectus femoris strain injury. Injury data were obtained from a questionnaire survey and magnetic resonance imaging. To confirm the region-specific functional role of the rectus femoris, surface multichannel electromyographic signals were recorded. Accordingly, eight legs had a history of central tendon injury, four had a history of myofascial junction injury, and four had a healed strain injury. When the injury was limited to the central tendon, the region-specific functional role disappeared. The region-specific functional role was confirmed when the injury was outside the central part. The neuromuscular function was also inhibited when the longitudinal range of the injured region was long. Our findings suggest that a central tendon injury with a long injury length impairs regional neuromuscular activation of the rectus femoris muscle.

scholarly journals The Effect of a Previous Strain Injury on Regional Neuromuscular Activation Within the Rectus Femoris

2019 ◽  
Vol 66 (1) ◽  
pp. 89-97 ◽  
Author(s):  
Yoshiaki Kubo ◽  
Kohei Watanabe ◽  
Koichi Nakazato ◽  
Koji Koyama ◽  
Takayoshi Hakkaku ◽  
...  
Keyword(s):  
Functional Role ◽  
Rectus Femoris ◽  
Knee Extension ◽  
Proximal Region ◽  
Significant Difference ◽  
History Of ◽  
Magnetic Resonance Imaging Mri ◽  
Hip Flexion ◽  
Semg Signals

Abstract The rectus femoris (RF) has a region-specific functional role; that is, the proximal region of the RF contributes more than the middle and distal regions during hip flexion. This study aimed to investigate whether RF strain injury affected the region-specific functional role of the muscle. We studied seven soccer players with a history of unilateral RF strain injury. Injury data were obtained from a questionnaire survey and magnetic resonance imaging (MRI). Multichannel surface electromyographic (SEMG) signals were recorded from the proximal to distal regions of the RF with 24 electrodes during isometric knee extension and hip flexion. The SEMG signals of each channel during hip flexion were normalised by those during knee extension for the injured and non-injured RF (HF/KE), and compared among the proximal, middle, and distal regions. Six RF strain injuries showed a low signal area in MRI. There was no significant difference in muscle strength between the injured and non-injured RF. While the HF/KE in the proximal region was significantly higher than those in the middle and distal regions in the non-injured RF, a difference in the HF/KE was seen only between the proximal and distal regions of the injured RF. Furthermore, the HF/KE of the most proximal channel in the injured RF was significantly lower than that in the non-injured RF. However, there was no significant difference between injured and non-injured areas in the HF/KE. Our findings suggest that the region-specific functional role of the RF muscle is partly affected by RF strain injury.

Heterogeneous neuromuscular activation within human rectus femoris muscle during pedaling

2015 ◽  
Vol 52 (3) ◽  
pp. 404-411 ◽  
Author(s):  
Kohei Watanabe ◽  
Motoki Kouzaki ◽  
Toshio Moritani
Keyword(s):  
Rectus Femoris ◽  
Neuromuscular Activation ◽  
Rectus Femoris Muscle ◽  
Femoris Muscle

Effect of aging on region‐specific functional role and muscle geometry along human rectus femoris muscle

2017 ◽  
Vol 56 (5) ◽  
pp. 982-986 ◽  
Author(s):  
Kohei Watanabe ◽  
Motoki Kouzaki ◽  
Toshio Moritani
Keyword(s):  
Functional Role ◽  
Rectus Femoris ◽  
Muscle Geometry ◽  
Rectus Femoris Muscle ◽  
Femoris Muscle

scholarly journals Arthroscopic excision of heterotopic ossification in the rectus femoris muscle causing extra-articular anterior hip impingement

SICOT-J ◽  
2018 ◽  
Vol 4 ◽  
pp. 41 ◽  
Author(s):  
Naoki Nakano ◽  
Laughter Lisenda ◽  
Vikas Khanduja
Keyword(s):  
Heterotopic Ossification ◽  
Rectus Femoris ◽  
Range Of Movement ◽  
Left Groin ◽  
Large Lesion ◽  
Hip Impingement ◽  
Arthroscopic Excision ◽  
History Of ◽  
Rectus Femoris Muscle ◽  
Femoris Muscle

Subspine impingement is an extra-articular hip impingement syndrome that usually occurs when there is abnormal contact between an enlarged or malorientated anterior inferior iliac spine (AIIS) and the distal anterior femoral neck in straight flexion of the hip. We present the case of a 13-year-old boy with a history of left groin pain and loss of range of movement of the hip for over six months following an avulsion fracture of the AIIS during a game of rugby. He was diagnosed with subspine impingement secondary to a large lesion of heterotopic ossification in the rectus femoris; this was dissected and extracted from the muscle in toto arthroscopically. This case highlights the importance of heterotopic ossification after injury as an important cause for subspine impingement in the young adult hip. This is the first report and describes subspine impingement secondary to a large lesion of heterotopic ossification.

scholarly journals Electromyographic Analysis of Traditional and Nontraditional Abdominal Exercises: Implications for Rehabilitation and Training

2006 ◽  
Vol 86 (5) ◽  
pp. 656-671 ◽  
Author(s):  
Rafael F Escamilla ◽  
Eric Babb ◽  
Ryan DeWitt ◽  
Patrick Jew ◽  
Peter Kelleher ◽  
...  
Keyword(s):  
Muscle Activity ◽  
Latissimus Dorsi ◽  
Rectus Femoris ◽  
Rectus Abdominis ◽  
Oblique Muscle ◽  
Emg Activity ◽  
Internal Oblique ◽  
Rectus Femoris Muscle ◽  
Femoris Muscle ◽  
Roll Out

Abstract Background and Purpose. Performing nontraditional abdominal exercises with devices such as abdominal straps, the Power Wheel, and the Ab Revolutionizer has been suggested as a way to activate abdominal and extraneous (nonabdominal) musculature as effectively as more traditional abdominal exercises, such as the crunch and bent-knee sit-up. The purpose of this study was to test the effectiveness of traditional and nontraditional abdominal exercises in activating abdominal and extraneous musculature. Subjects. Twenty-one men and women who were healthy and between 23 and 43 years of age were recruited for this study. Methods. Surface electromyography (EMG) was used to assess muscle activity from the upper and lower rectus abdominis, external and internal oblique, rectus femoris, latissimus dorsi, and lumbar paraspinal muscles while each exercise was performed. The EMG data were normalized to maximum voluntary muscle contractions. Differences in muscle activity were assessed by a 1-way, repeated-measures analysis of variance. Results. Upper and lower rectus abdominis, internal oblique, and latissimus dorsi muscle EMG activity were highest for the Power Wheel (pike, knee-up, and roll-out), hanging knee-up with straps, and reverse crunch inclined 30 degrees. External oblique muscle EMG activity was highest for the Power Wheel (pike, knee-up, and roll-out) and hanging knee-up with straps. Rectus femoris muscle EMG activity was highest for the Power Wheel (pike and knee-up), reverse crunch inclined 30 degrees, and bent-knee sit-up. Lumbar paraspinal muscle EMG activity was low and similar among exercises. Discussion and Conclusion. The Power Wheel (pike, knee-up, and roll-out), hanging knee-up with straps, and reverse crunch inclined 30 degrees not only were the most effective exercises in activating abdominal musculature but also were the most effective in activating extraneous musculature. The relatively high rectus femoris muscle activity obtained with the Power Wheel (pike and knee-up), reverse crunch inclined 30 degrees, and bent-knee sit-up may be problematic for some people with low back problems.

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