Measuring the force perception in knee flexor/ extensor muscles in patients with anterior cruciate ligament injury and healthy subjects

Abstract

BACKGROUND: Force perception as a contributor to the neuromuscular control of the knee joint may be altered after anterior cruciate ligament (ACL) injury. OBJECTIVE: This study aimed to compare the force perception accuracy in the knee joints of patients with ACL injury and healthy subjects. METHODS: Twenty-six patients with ACL injury and 26 healthy subjects participated in this case-control study. Participants were asked to produce 50% of the maximum voluntary isometric contraction of the knee muscles as a target force and reproduce it in their limbs in flexion and extension directions. RESULTS: There were significant interactions between group and condition as well as group, condition, and limb in the force perception error respectively (P< 0.05). The highest amount of error was seen in the contralateral limb of the ACL injury group when the reference force was produced in the injured limb (P< 0.05). CONCLUSION: The findings revealed that the force perception accuracy in the knee flexor/extensor muscles of individuals with ACL injury is impaired. Moreover, error is most evident when the patient produces force in the injured limb and replicates it in the uninjured limb in both flexion and extension directions. Therefore, the rehabilitation programs should encompass neuromuscular training in both quadriceps and hamstrings after ACL injury.

Effect of Nursing in Operating Room Combined with Intraoperative Heat Preservation Intervention on Prevention of Incision Infection and Improvement of Hemodynamics in Patients with Anterior Cruciate Ligament Injury and Reconstruction under Knee Arthroscopy

“…ACL injury is one of the common knee joint injuries in clinic, accounting for about 80% of knee joint ligament injuries, mostly in sports injuries, and nonsports injuries account for 27.2% [14]. According to statistics, the annual incidence of ACL injury in the general population of the United States is 1 to 3 000, while the incidence of ACL injury in sports is even higher: 60/100000 for football players and 70/100000 for skiers [15]. The probability of ACL injury in female athletes is four times higher compared to men.…”

“…The prevalence rate of ACL injury in active service athletes in China is 0.43%, with the improvement of living standards and health concepts. As more people participate in physical exercise, the probability of ACL injury increases [15]. ACL is an important anatomical structure in the knee joint, which starts from the anterior medial side of the tibial intercondylar eminence and ends at the back of the lateral wall of the intercondylar fossa.…”

Effects of inhalation of the hydrogen-rich gas before sleep on fatigue recovery in healthy adults

“…Besides peripheral muscular strength, the performance of CMJ requires high degrees of motor unit recruitment and frequency of nerve pulse delivery. [27][28][29] One session of intaking hydrogen, which though can facilitate local ROS clearance promoting muscle fatigue recovery, may not induce signi cant improvements in CMJ performance, which depends upon multiple neurophysiological elements. Still, we observed that H 2 inhalation before sleep signi cantly improved the MVIC and muscle force perception.…”