Strength and cross-sectional area of knee extensor muscles in children

1994 ◽  
Vol 68 (5) ◽  
pp. 402-405 ◽  
Author(s):  
H. Kanehisa ◽  
S. Ikegawa ◽  
N. Tsunoda ◽  
T. Fukunaga
Keyword(s):  
Knee Extensor ◽  
Cross Sectional Area ◽  
Sectional Area ◽  
Cross Sectional ◽  
Extensor Muscles ◽  
Knee Extensor Muscles

The Preoperative Cross-sectional Area of the Deep Cervical Extensor Muscles Does Not Predict Loss of Lordosis After Cervical Laminoplasty

2021 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Jinping Liu ◽  
Rong Xie ◽  
Huibing Ruan ◽  
Joshua Rivera ◽  
Bo Li ◽  
...  
Keyword(s):  
Cross Sectional Area ◽  
Cervical Laminoplasty ◽  
Sectional Area ◽  
Cross Sectional ◽  
Extensor Muscles

Cross-sectional area and mean echogenicity of shoulder and elbow tendons in adult German Shepherd dogs

2013 ◽  
Vol 26 (05) ◽  
pp. 366-371 ◽  
Author(s):  
G. Loprete ◽  
V. Musella ◽  
D. Britti ◽  
J. M. Vilar ◽  
G. Spinella
Keyword(s):  
Cross Sectional Area ◽  
Sectional Area ◽  
Triceps Brachii ◽  
German Shepherd ◽  
Cross Sectional ◽  
Extensor Muscles ◽  
Flexor Carpi Ulnaris ◽  
Triceps Brachii Muscle ◽  
The Cross ◽  
Distal Tendon

SummaryThe aim of this study was to describe the cross-sectional area and mean echogenicity of the main tendons of the shoulder and elbow joints in adult German Shepherd dogs and to determine the effects of sex, weight, and age on these parameters. No previous publications in the veterinary literature have reported information regarding quantitative ultrasonographic tendon measurements in dogs.Thirty German Shepherd dogs were examined: 13 males and 17 females. The cross-sectional area was significantly higher in males than in females (p <0.05) for the distal tendon of the triceps brachii muscle and the tendons of the flexor carpi ulnaris and common digital extensor muscles. The influence of sex on mean echogenicity was not significant. According to age, mean echogenicity was higher in older dogs, while the cross-sectional areas were similar in the two groups. Cross-sectional area and mean echogenicity of the tendons showed a direct increase with an increase in body weight. The data gained from this study can help support the clinician to discriminate between normal and pathological conditions.

Comparison of the isometric cervical extension strength and a cross-sectional area of neck extensor muscles in college wrestlers and judo athletes

2001 ◽  
Vol 84 (6) ◽  
pp. 487-491 ◽  
Author(s):  
Kaoru Tsuyama ◽  
Yosuke Yamamoto ◽  
Hideo Fujimoto ◽  
Takumi Adachi ◽  
Koichi Nakazato ◽  
...  
Keyword(s):  
Cross Sectional Area ◽  
Sectional Area ◽  
Cross Sectional ◽  
Extensor Muscles ◽  
Judo Athletes

Sex-based differences in skeletal muscle function and morphology with short-term limb immobilization

2005 ◽  
Vol 99 (3) ◽  
pp. 1085-1092 ◽  
Author(s):  
Nobuo Yasuda ◽  
Elisa I. Glover ◽  
Stuart M. Phillips ◽  
Robert J. Isfort ◽  
Mark A. Tarnopolsky
Keyword(s):  
Muscle Strength ◽  
Lean Mass ◽  
Muscle Function ◽  
Knee Extensor ◽  
Quadriceps Femoris ◽  
Cross Sectional Area ◽  
Sectional Area ◽  
Short Term ◽  
Cross Sectional ◽  
Time Points

The purpose of this study was to determine the effects of short-term (14-day) unilateral leg immobilization using a simple knee brace (60° flexion)- or crutch-mediated model on muscle function and morphology in men (M, n = 13) and women (W, n = 14). Isometric and isokinetic (concentric-slow, 0.52 rad/s and fast, 5.24 rad/s) knee extensor peak torque was determined at three time points (Pre, Day-2, and Day-14). At the same time points, magnetic resonance imaging was used to measure the cross-sectional area of the quadriceps femoris and dual-energy X-ray absorptiometry scanning was used to calculate leg lean mass. Muscle biopsies were taken from vastus lateralis at Pre and Day-14 for myosin ATPase and myosin heavy chain analysis. Women showed greater decreases (Pre vs. Day-14) compared with men in specific strength (N/cm2) for isometric [M = 3.1 ± 13.3, W = 17.1 ± 15.9%; P = 0.055 (mean ± SD)] and concentric-slow (M = 4.7 ± 11.3, W = 16.6 ± 18.4%; P < 0.05) contractions. There were no immobilization-induced sex-specific differences in the decrease in quadriceps femoris cross-sectional area (M = 5.7 ± 5.0, W = 5.9 ± 5.2%) or leg lean mass (M = 3.7 ± 4.2, W = 2.7 ± 2.8%). There were no fiber-type transformations, and the decreases in type I (M = 4.8 ± 5.0, W = 5.9 ± 3.4%), IIa (M = 7.9 ± 9.9, W = 8.8 ± 8.0%), and IIx (M = 10.7 ± 10.8, W = 10.8 ± 12.1%) fiber areas were similar between sexes. These findings indicate that immobilization-induced loss of knee extensor muscle strength is greater in women compared with men despite a similar extent of atrophy at the myofiber and whole muscle levels after 14 days of unilateral leg immobilization. Furthermore, we have described an effective and safe knee immobilization method that results in reductions in quadriceps muscle strength and size.

Sign in / Sign up

Export Citation Format

Share Document