scholarly journals Knee Muscle Torque and H:Q Ratio Changes before ACL Surgery and after Rehabilitation

2018 ◽  
Vol 2 (81) ◽  
Author(s):  
Dovilė Parulytė ◽  
Nerijus Masiulis ◽  
Vaida Aleknavičiūtė ◽  
Rima Solianik ◽  
Gintarė Dargevičiūtė ◽  
...  
Keyword(s):  
Knee Joint ◽  
Muscle Activation ◽  
Neuromuscular Control ◽  
Strength Loss ◽  
Quadriceps Femoris ◽  
Knee Extensors ◽  
Muscle Torque ◽  
Acl Surgery ◽  
H:Q Ratio ◽  
Femoris Muscle

Research background and hypothesis. Anterior cruciate ligament (ACL) of the knee joint is often quite a fragile structure of the knee. After the rupture of ACL neuromuscular control worsens and sensorimotor system breaks down (Risberg et al., 2007), muscle activation is poor and muscle strength decreases (Croce, Miller, 2006). Some authors have reported greater strength loss in quadriceps femoris than in hamstring femoris muscle (Busch-Joseph et al., 2001; Neeter et al., 2006), therefore we hypothesized that strength loss in knee extensors may affect hamstring/quadriceps torque (H:Q) ratio. Research aim of this study was to investigate knee extensors and fl exors isometric and dynamic torque and H:Q ratio alterations before ACL surgery and after rehabilitation.Research methods. Ten volunteers with ACL ruptured knee where tested before surgery and after rehabilitation. Isokinetic dynamometer was used for this testing. Maximal isometric torque was performed during fl exion and extension at 90°, 60º knee angles. Dynamic torque was performed at 30, 180, 300º/s angular velocities.Research results. Results of this study show that after rehabilitation isometric and dynamic torque of the involved leg decreased. Isometric fl exion and extension torque of the uninjured leg was greater than that of the injured leg, but after rehabilitation the extension torque of the injured leg was lower than that before surgery. Discussion and conclusions. Before ACL surgery and after rehabilitation quadriceps femoris muscle torque of the uninjured leg was more affected than hamstring femoris muscle torque. After rehabilitation H:Q ratio of the injured leg was not dependent on angular velocity and knee joint angle.Keywords: maximal voluntary torque, muscle balance, muscle contraction.

scholarly journals Estimation of quadriceps femoris muscle dysfunction in the early period after surgery of the knee joint using shear-wave elastography

2018 ◽  
Vol 4 (1) ◽  
pp. e000381 ◽  
Author(s):  
Makoto Kawai ◽  
Keigo Taniguchi ◽  
Tomoyuki Suzuki ◽  
Masaki Katayose
Keyword(s):  
Shear Modulus ◽  
Knee Joint ◽  
Patient Group ◽  
Quadriceps Femoris ◽  
Control Group ◽  
Muscle Dysfunction ◽  
Shear Moduli ◽  
Quadriceps Femoris Muscle ◽  
Contraction Ratio ◽  
Femoris Muscle

ObjectivesOrthopaedic surgery of the knee joint results in functional deterioration of the quadriceps femoris muscle. However, little is known about quadriceps femoris muscle dysfunction in the early postsurgical period. Therefore, we examined the stiffness of the quadriceps femoris muscle in the early postsurgical period.MethodsSeven patients and seven healthy controls performed quadriceps contraction exercises. In resting and contraction conditions, the shear modulus, muscle thickness and pennation angle were measured for the vastus medialis (VM), vastus lateralis (VL) and the rectus femoris (RF) using ultrasound elastography.ResultsThe shear moduli of the VM, VL and RF in the control group did not significantly interact, while the shear moduli in the patient group did show a significant interaction. In the resting condition, there was no difference between the unaffected and affected sides in the patient group, but the shear moduli of the VM and VL in the contraction condition was significantly lower on the affected side than the unaffected side.The contraction ratios between muscles by limbs did not significantly interact. However, there were main effects due to muscle and limb factors. The VM and VL had a significantly higher contraction ratio than the RF, and the control and unaffected limbs had a higher contraction ratio than the affected limb.ConclusionThe results demonstrated a decrease in muscle stiffness during contraction in patients with quadriceps femoris dysfunction. Measurement of the shear modulus has potential as a new evaluation index and with high sensitivity to decreases in muscle contraction.

Arthrokinetic Reflex of the Knee

1956 ◽  
Vol 184 (2) ◽  
pp. 433-437 ◽  
Author(s):  
Leonard A. Cohen ◽  
Manfred L. Cohen
Keyword(s):  
Knee Joint ◽  
Full Range ◽  
Nervous Activity ◽  
Quadriceps Femoris ◽  
General Function ◽  
Joint Movement ◽  
Semitendinosus Muscle ◽  
Quadriceps Femoris Muscle ◽  
Flexion Extension ◽  
Femoris Muscle

The knee joint of decerebrate cats was rotated through a full range of flexion-extension movements. The tensions of quadriceps femoris muscle and semitendinosus muscle were recorded and the responses of these muscles to joint movement were studied. The medial and posterior articular nerves were later sectioned and control records were taken. Flexion of the knee decreased the tension of quadriceps femoris but increased that of semitendinosus. Re-extension of the knee restored both tensions to their resting values. Data were obtained which showed that these responses were reflex in nature. Since the knee joint reflex is basically a slow adapting movement reflex, the name ‘arthrokinetic reflex’ seems appropriate. The activity of the arthrokinetic reflex indicates that its general function is to coordinate knee movement with other nervous activity in thigh muscles. In addition to this, the arthrokinetic reflex of the knee appears to have specific orientation toward dealing with the powerful stretch reflex of the quadriceps femoris muscle.

QUADRICEPS FEMORIS MUSCLE ACTIVATION DURING KNEE EXTENSION EXERCISE

2003 ◽  
Vol 35 (Supplement 1) ◽  
pp. S263 ◽  
Author(s):  
D M. Pincivero ◽  
K McCarthy ◽  
R M. Campy ◽  
Y Salfetnikov ◽  
A J. Coelho
Keyword(s):  
Muscle Activation ◽  
Knee Extension ◽  
Quadriceps Femoris ◽  
Quadriceps Femoris Muscle ◽  
Knee Extension Exercise ◽  
Femoris Muscle

A New Method for the Determination of the Characteristic Shape of an Isokinetic Quadriceps Femoris Muscle Torque Curve

1992 ◽  
Vol 72 (8) ◽  
pp. 585-592 ◽  
Author(s):  
Leslie Afzali ◽  
Fumi Kuwabara ◽  
James Zachazewski ◽  
Phyllis Browne ◽  
Bonnie Robinson
Keyword(s):  
Quadriceps Femoris ◽  
New Method ◽  
Quadriceps Femoris Muscle ◽  
Characteristic Shape ◽  
Muscle Torque ◽  
Torque Curve ◽  
Femoris Muscle

scholarly journals Function of the Distal Part of the Vastus Medialis Muscle as a Generator of Knee Extension Twitch Torque

2020 ◽  
Vol 5 (4) ◽  
pp. 98
Author(s):  
Yoshitsugu Tanino ◽  
Takaki Yoshida ◽  
Wataru Yamazaki ◽  
Yuki Fukumoto ◽  
Tetsuya Nakao ◽  
...  
Keyword(s):  
Knee Joint ◽  
Distal Part ◽  
Knee Extension ◽  
Quadriceps Femoris ◽  
Joint Torque ◽  
Vastus Medialis ◽  
Knee Angle ◽  
Quadriceps Femoris Muscle ◽  
Significant Difference ◽  
Femoris Muscle

The distal part of the vastus medialis (VM) (VM obliquus: VMO) muscle acts as the medial stabilizer of the patella. However, it has been known to facilitate VMO contraction during training of the quadriceps femoris muscle in knee joint rehabilitation. This study aimed to examine the contribution degree of VMO as a knee joint extension torque generator. Sixteen healthy male volunteers participated in this study. Electrical muscle stimulation (EMS) was performed on VMO at 60° knee angle for 20 min to induce muscle fatigue. Knee extension twitch torques (TT) at 90° and 30° knee angle evoked by femoral nerve stimulation were measured before and after EMS. Although each TT at 90° and 30° knee angle significantly decreased after EMS, the decreased TT rate in both joint angles showed no significant difference. Our results show that VMO might contribute to the generation of the knee joint torque at the same level in the range from flexion to extension. Therefore, it was suggested that the facilitating the neural drive for VMO is important during the quadriceps femoris muscle strengthening exercise.

scholarly journals Bi-modal recovery of quadriceps femoris muscle function after sustained maximum voluntary contraction at different muscle length

Medicina ◽  
2008 ◽  
Vol 44 (10) ◽  
pp. 782 ◽  
Author(s):  
Albertas Skurvydas ◽  
Nerijus Masiulis ◽  
Aleksas Stanislovaitis ◽  
Sigitas Kamandulis
Keyword(s):  
Knee Joint ◽  
Time Course ◽  
Maximum Voluntary Contraction ◽  
Muscle Length ◽  
Quadriceps Femoris ◽  
Voluntary Contraction ◽  
Posttetanic Potentiation ◽  
Quadriceps Femoris Muscle ◽  
Generating Capacity ◽  
Femoris Muscle

The aim of this study was to test the hypothesis that contractility of quadriceps femoris muscle during a 15-min period after a sustained maximum voluntary contraction for 1 min is determined by the interaction of posttetanic potentiation, metabolic fatigue, and nonmetabolic fatigue. Eleven healthy untrained men (age, 22.9±1.8 years; body weight, 77.5±5.2 kg) performed isometric 1-min maximum voluntary contraction at long (90° in knee joint) and short (135° in knee joint) muscle length at two different occasions. Contractility of quadriceps femoris muscle was monitored via the evoked contractions at 1, 10, 20, and 50 Hz and maximum voluntary contraction at short and long muscle length on both occasions. Force generating capacity was reduced immediately after 1-min maximum voluntary contraction at short and long muscle length, and then a bi-modal time-course of recovery was observed which consisted of (1) rapid recovery of all measured indexes at 3 min and (2) divergence in the changes of forces at low and high stimulation frequencies, as well as maximal voluntary contraction force at 7 and 15 min after exercising. The decline in force immediately after 1-min isometric load was caused by metabolic and nonmetabolic fatigue; however, factors related to the metabolic fatigue were prevalent. As the effect of metabolic fatigue was diminishing and posttetanic potentiation was still present, force generation capacity recovered at 3 minutes after exercising. Further dynamics of contractility can be explained by the fading influence of posttetanic potentiation and dominant effect of nonmetabolic fatigue.

scholarly journals Effects of Length on the Catchlike Property of Human Quadriceps Femoris Muscle

1999 ◽  
Vol 79 (8) ◽  
pp. 738-748 ◽  
Author(s):  
Samuel CK Lee ◽  
Michelle L Gerdom ◽  
Stuart A Binder-Macleod
Keyword(s):  
Skeletal Muscle ◽  
Electrical Stimulation ◽  
Knee Joint ◽  
Quadriceps Femoris ◽  
Constant Frequency ◽  
Quadriceps Femoris Muscle ◽  
Force Time ◽  
Activation Conditions ◽  
Quadriceps Femoris Muscles ◽  
Femoris Muscle

Abstract Background and Purpose. Recent reports have suggested that electrical stimulation trains that take advantage of the catchlike property of skeletal muscle can produce higher forces from skeletal muscle than traditionally used constant-frequency trains. This study investigated the effects of catchlike-inducing trains on human quadriceps femoris muscles while the knee joint was held at 15 degrees of flexion. Subjects and Methods. Subjects (N=12) were tested with constant-frequency trains that had interpulse intervals ranging from 10 to 160 milliseconds and comparable catchlike-inducing trains. Data were collected during the control condition (1 train every 10 seconds) and during repetitive contractions (1 train per second). Results. During control and repetitive activation conditions, catchlike-inducing trains produced approximately 5% to 110% greater peak forces than comparable constant-frequency trains, depending on the frequencies being compared. Total forces produced (ie, force-time integrals) were increased up to 59% and 49% during the control and repetitive activation conditions, respectively. Conclusion and Discussion. These results support earlier findings that catchlike-inducing trains may be advantageous in functional electrical stimulation applications.

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