Kinematic Comparison on Lower Limb Kicking Action of Fetuses in Different Gestational Weeks: A Pilot Study

The fetal movements during different gestational weeks are essential for normal musculoskeletal development. The kinematic characteristics of fetuses with small differences in gestational weeks may be different and important. Ultrasonographic videos of fetal kicking action and plantarflexion action were collected from three healthy pregnant women (24, 27, and 30 gestational weeks) with normal fetal development. The kinematic characteristics, including angular range and angular velocity, were analyzed. These kinematic parameters were measured using simi motion. The final knee angle was found to decrease with progressive gestational weeks. Compared with 24 w, the knee joint angle at 27 w and 30 w was significantly reduced at the end of a kick-type movement (p < 0.01). Except for the mean angular velocity of the knee joint, there were no significant differences in the other conditions. The value at 30 w for mean angular velocity was significantly higher than that at 24 w (p = 0.02). In the ankle joint, no significant differences were observed between different conditions. Therefore, we can conclude that there was no significant difference in the kinematic characteristics of the ankle joint for small gestational age gaps, but there was a significant difference in the knee joint. As the gestation weeks increase, the range of kicking motion tends to decrease. The reason may be that with the increase of gestational weeks, fetal lower limb musculoskeletal development is gradually enhanced; the slower growth rate indicates that development reaches a peak level in weeks 24 to 30.

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INFLUENCE OF FOOT INSOLE ON THE GAIT PERFORMANCE IN SUBJECTS WITH FLAT FOOT DISORDER

Journal of Mechanics in Medicine and Biology ◽

10.1142/s0219519419500507 ◽

2019 ◽

Vol 19 (06) ◽

pp. 1950050

Author(s):

M. T. KARIMI ◽

R. B. TAHMASEBI ◽

B. SATVATI ◽

F. FATOYE

Keyword(s):

Range Of Motion ◽

Ankle Joint ◽

Lower Limb ◽

Walking Speed ◽

Force Plate ◽

Flat Foot ◽

Gait Performance ◽

Positive Effects ◽

Significant Difference ◽

Foot Disorder

Flat foot is the most common foot disorder that influences the alignment of the lower limb structure. It is controversial whether the use of foot insole influences kinetic and kinematic of the leg or not. Therefore, this study investigated the influence of foot insole on the gait performance in subjects with flat foot disorder. A group of flat foot subject was recruited into this study (the number of subjects was 15). The motion of the leg joints was determined using the Qualysis motion analysis system. Moreover, the force applied on the lower limb was recorded by a Kistler force plate. The range of motion of the lower limb joints, the moments applied on the lower limb joints and force transmitted through the leg were the parameters used in this study. The difference between these parameters during walking with and without insole was evaluated using the paired [Formula: see text]-test. Significant value was set at [Formula: see text]. There was no significant difference between the range of motion of ankle joint while walking with and without insole. However, the medial directed force applied on the leg decreased significantly [Formula: see text]. The use of foot insole did not influence the moments transmitted through the hip and knee joints. The walking speed of the subjects improved while walking with foot insole. Use of foot insole influenced the magnitude of the force applied on the leg and the adductor moment of ankle joint due to its influence on foot alignment. As the walking speed of the improved subjects follows the use of insole, it can be concluded that it may have a positive effects on the performance of flat foot subjects.

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Efficacy of intrathecal midazolam on enhancing analgesic effect of fentanyl in patients undergoing lower limb surgery

Biomedical Research and Therapy ◽

10.15419/bmrat.v5i10.487 ◽

2018 ◽

Vol 5 (10) ◽

pp. 2726-2732

Author(s):

Masoum Khoshfetrat ◽

Sima Davarpanah ◽

Aliakbar Keykha

Keyword(s):

Nerve Block ◽

Lower Limb ◽

Analgesic Effect ◽

Synergistic Effects ◽

Sensory Nerve ◽

Study Groups ◽

The Third ◽

Significant Difference ◽

Lower Limb Surgery ◽

The Mean

Background: Co-administration of drugs with synergistic effects is considered as one of the methods to increase the effectiveness of intrathecal anesthesia and to reduce the need for injectable analgesics. The purpose of this study was to investigate the efficacy of intrathecal midazolam on enhancing the analgesic effect of fentanyl in patients undergoing lower limb surgery. Materials: The present double-blinded clinical trial was conducted on 90 candidate patients undergoing lower limb orthopedic surgery in 2017 at Khatam-Al-Anbiya Hospital in the city of Zahedan, Iran. To this end, the patients were selected via convenience sampling method and then randomly divided into three groups. Afterwards, 3 cc of 0.5% hyperbaric Marcaine was injected intrathecally in the first group, 3 cc of Marcaine + 25 ug of fentanyl was administered to the second group, and 3 cc of Marcaine + 25 ug of fentanyl + 1 mg of midazolam was administered to the third group (the final volume of all three syringes was brought up to 3.7 cc with normal saline). The duration of sensory nerve block and those of motor block and analgesia, as well as changes in vital signs, were then measured in these groups. Moreover, the data were analyzed using SPSS Statistics (Version 22.0) through Chi-square test and one-way analysis of variance (ANOVA). Results: The mean age and gender distribution of the patients in the three study groups did not differ significantly. The mean duration of sensory nerve block was equal to 98.6+/-11.1 min in the first group, 142.2+/-12.4 min in the second group, and 174.3+/-10.9 min in the third group; all showed a statistically significant difference (P=0.0001, P=0.001, P=0.000).The mean duration of analgesia was also reported to be 204.43+/-0.3 min in the first group, 323.62+/-7.4 min in the second group, and 526.22+/-0.9 min in the third group, indicating a statistically significant difference between the three study groups (P=0.0001, P=0.000, P=000). Conclusion: The results of this study demonstrated that adding midazolam to intrathecal fentanyl could significantly increase the duration of sensory nerve block and that of post-operative analgesia.

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Results of Arthroscopic Synovectomy for Treatment of Synovial Lipomatosis (Lipoma Arborescens) of the Knee

The Journal of Knee Surgery ◽

10.1055/s-0037-1604440 ◽

2017 ◽

Vol 31 (06) ◽

pp. 536-540 ◽

Cited By ~ 4

Author(s):

Melih Malkoc ◽

Özgur Korkmaz

Keyword(s):

Knee Joint ◽

Inflammatory Cells ◽

Knee Joints ◽

Lipoma Arborescens ◽

Arthroscopic Synovectomy ◽

Tumor Pathology ◽

Significant Difference ◽

The Mean ◽

Synovial Lipomatosis

AbstractSynovial lipomatosis (SL; lipoma arborescens) is a tumor-like condition with villous proliferation of the synovium. The exact etiology of SL is still unknown. The knee is the most commonly involved part. The goal of this retrospective study was to report the results of arthroscopic synovectomy in patients with SL in their knee joints as well as to emphasize the importance of considering this pathology when treating patients with recurrent knee joint effusions. In total, 21 patients (8 females and 13 males) were evaluated retrospectively from May 2009 to July 2014. The mean follow-up period was 29.13 (range, 12–61) months. The mean duration of compliance was 22.76 (range, 7–61) months. All patients were evaluated by Knee Society score pre- and postoperatively. The mean preoperative and last follow-up Knee Society scores were 67.82 and 88.23 points, respectively. There was a significant difference between the preoperative and postoperative Knee Society scores (p = 0.0001). Histopathological examinations showed that the subsynovial layer exhibited diffuse replacement by mature fat cells that had formed villous projections. In addition, infiltration of mononuclear inflammatory cells was observed at different stages. SL is a nondestructive and benign tumor pathology of the knee joint without a clearly identified etiology. The main difficulty in diagnosis is lack of clinical practice.

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Design of wireless device to measure plantar pressure and gait analysis

Journal of Innovations in Engineering Education ◽

10.3126/jiee.v2i1.36669 ◽

2019 ◽

Vol 2 (1) ◽

pp. 174-181

Author(s):

Mahendra Khatri ◽

Sambardhan Dabadi ◽

Sandeep Kumar Shrestha ◽

Saugat Acharya ◽

Sudip Tamang ◽

...

Keyword(s):

Hip Joint ◽

Lower Limb ◽

Plantar Pressure ◽

Walking Speed ◽

Pressure Sensors ◽

The Body ◽

Joint Movement ◽

Significant Difference ◽

Mean Pressure ◽

The Mean

Foot plantar pressure is the pressure field that acts between the plantar region of the foot and supporting ground. The pressure exerted on the variable region of the foot can be determined using discrete pressure sensors. Information obtained from these sensors is useful in the measurement of gait and posture for diagnosing various problems associated with a lower limb, footwear design, and sports biomechanics. This project is aimed to design a portable in-shoe plantar pressure and gyroscope-based gait angle measurement system. Six Force Sensitive Resistor (FSR) placed in the sole (hallux, 1st, 5th metatarsal, midfoot lateral, midfoot medial and heel respectively) detects the plantar pressure and gyroscope placed at the ankle, knee and hip help measure the orientation and angle of joint movement during various phases of gait. The study among 16 male and 16 female subjects illustrated the significant pressure variation (p<0.0001, t=5.17 with α=95%). Similarly, there was a significant difference in pressure between normal and fast walking speed (p<0.0001, t=5.88) with mean values of 353Kpa and 426Kpa respectively. The mean pressure value for slow walking speed was 423Kpa while there was no significant variation between slow and normal walking speeds (p=0.62, t=1.98). Plantar pressure increased linearly with an increase in the body weight of a person as well. The mean pressure for the 45-50 age group was 313.25Kpa and that for 70-75 was 449Kpa. The study among 10 diabetics and 10 non-diabetic subjects illustrated significantly higher pressure on 1st and 5th metatarsal on diabetic subjects (p=0.0207 and t=2.536). The movement of ankle, knee and hip joint is visualized using the 3D model of a lower limb through processing software. The study illustrated the range of ankle joint movement between -60(dorsiflexion) to 200(plantarflexion), for knee joint was 00 to 300 (flexion) and that for hip joint was -50(extension) to 400(flexion). There was a significant difference in angular values for all three joints while climbing up and down the staircase as compared to walk in a level surface.

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Comparison between isobaric levobupivacaine 0.5% and hyperbaric bupivacaine 0.5% in spinal anesthesia in lower limb surgeries and lower abdominal surgeries in adult patients

International Journal of Research in Medical Sciences ◽

10.18203/2320-6012.ijrms20210417 ◽

2021 ◽

Vol 9 (2) ◽

pp. 418

Author(s):

Preeti Parashar ◽

Anisha Singh ◽

Manoj Kumar Sharma ◽

Dipak L. Raval

Keyword(s):

Blood Pressure ◽

Lower Limb ◽

Motor Block ◽

Total Duration ◽

Sensory Block ◽

Hyperbaric Bupivacaine ◽

Significant Difference ◽

The Mean ◽

Group B ◽

Mean Time

Background: The aim of our study was to compare sensory and motor block characteristics and hemodynamic changes following intrathecal hyperbaric bupivacaine (0.5%) and isobaric levobupivacaine (0.5%) in elective lower limb and lower abdominal surgeries.Methods: 60 patients of either sex, aged 18-60 years, ASA grade I or II scheduled for elective lower abdominal and lower limb surgeries were randomized into two groups, group B (n=30) and group L (n=30) and received either 3 ml of intrathecal hyperbaric bupivacaine or isobaric levobupivacaine intrathecally.Results: The mean time of onset of sensory block at shin of tibia in both the groups was comparable i.e. levobupivacaine (1.19±0.2 minutes) and bupivacaine (1.1+0.2 minutes). The mean time for total duration of sensory block was 211.1±8.2 minutes in group L, while 193.13±13.7 minutes in group B. Time for total duration of motor block in group L was 198.76±8.428 minutes and in group B was 182.6±13.989 minutes. Statistically significant difference was observed in total duration of sensory and motor block in both levobupivaciane and bupivacaine group (p<0.0001). Patients in group L were hemodynamically more stable with significantly less decrease in pulse rate, systolic blood pressure and diastolic blood pressure as compared to group B.Conclusions: We observed that 0.5% isobaric levobupivacaine provided better hemodynamic stability, longer duration of sensory and motor block as compared to bupivacaine.

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Anatomical Study of Saphenous Nerve and Great Saphenous Vein Using a Peripheral Vein Illumination Device and Ultrasonography

Foot & Ankle Orthopaedics ◽

10.1177/2473011419s00327 ◽

2019 ◽

Vol 4 (4) ◽

pp. 2473011419S0032

Author(s):

Yuki Ota ◽

Tomoyuki Nakasa ◽

Yasunari Ikuta ◽

Yusuke Tsuyuguchi ◽

Munekazu Kanemitsu ◽

...

Keyword(s):

Knee Joint ◽

Nerve Block ◽

Saphenous Vein ◽

Near Infrared ◽

Imaging System ◽

External Rotation ◽

Saphenous Nerve ◽

Skin Marker ◽

Significant Difference ◽

The Mean

Category: Ankle, Basic Sciences/Biologics Introduction/Purpose: Usefulness of ultrasonographic guided saphenous nerve block is well known for perioperative pain management of foot and ankle surgery. However, in some cases it may be impossible to identify the saphenous nerve, especially women or obese patients, so successful rate of ultrasonographic guided saphenous nerve block was reported 70 to 80%. Previous reports demonstrated that the saphenous nerve is running adjacent to the greater saphenous vein, which suggests that the greater saphenous vein can be an indicator to identify the saphenous nerve. The purpose of this study was to examine anatomical relationship between the saphenous nerve and the greater saphenous vein which is depicted using the near-infrared (NIR) vascular imaging system, the Vein Viewer Flex®. Methods: Thirty legs as 15 healthy subjects (13 males, 2 females) were included in this study. Average age was 34.2 ± 3.2 years old. In a supine position, the knee joint was flexed 60 degrees with mild flexion, abduction, and external rotation of the hip joint, and the greater saphenous vein was depicted using the Vein Viewer Flex® on the skin of the lower extremity. The vein visualized as a green light was then marked using the skin marker. (Figure 1). After marking the greater saphenous vein, the greater saphenous vein and saphenous nerve were identified under ultrasonography at 5 cm distal from the medial knee joint space (Figure 2). The distance between the greater saphenous vein which was marked using the Vein Viewer Flex® and the saphenous nerve was measured in the ultrasonography images. The circumference of the leg (COL) was also measured. Results: The course of the greater saphenous vein could be depicted by the Vein Viewer Flex® in all cases, and it was confirmed by ultrasonography. It was confirmed that the saphenous nerve was located under the sartorius fascia and it was running posteromedially in parallel of the greater saphenous vein. The mean distance from the saphenous nerve and the greater saphenous vein was 7.9 ± 2.7 mm. There was no significant difference between left and right legs (right: 7.9±2.8 mm, left: 8.0±3.0 mm, P=0.95). The mean COL was 34.2 ± 1.9 mm, and there was a moderate positive correlation (r = 0.45). Conclusion: This study revealed that the saphenous nerve is running in parallel of the greater saphenous vein which can be depicted by the Vein Viewer Flex®. Ultrasonography after depicting greater saphenous vein enabled to confirm the saphenous nerve with certainly and noninvasive. These findings suggested that the combination of the Vein Viewer Flex® and ultrasonography enables the saphenous nerve block to be more reliable procedure even the saphenous nerve is hardly identified by the ultrasonography.

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Changes in Coronal Alignment of the Knee Joint after Supramalleolar Osteotomy

BioMed Research International ◽

10.1155/2021/6664279 ◽

2021 ◽

Vol 2021 ◽

pp. 1-8

Author(s):

Dong-Il Chun ◽

Jahyung Kim ◽

Sung Hun Won ◽

Jaeho Cho ◽

Jeongku Ha ◽

...

Keyword(s):

Logistic Regression ◽

Knee Joint ◽

Ankle Joint ◽

Lower Limb ◽

Varus Deformity ◽

Limb Alignment ◽

Coronal Alignment ◽

Lower Limb Alignment ◽

Radiographic Parameters ◽

Supramalleolar Osteotomy

Background. Assessing knee joint orientation changes after SMO may help clinical advancement in managing patients with ipsilateral ankle and knee joint arthritis. However, knee joint changes after supramalleolar osteotomy (SMO) have not been reported. We investigated changes in coronal alignment of the knee joint after SMO. Methods. In this multicentre study, from January 2014 to December 2018, 47 ankles with varus osteoarthritis treated with SMO were retrospectively identified. Ankle joint changes were assessed using the tibiotalar angle, talar tilt angle, and lateral distal tibial angle (LDTA); knee joint changes using the medial proximal tibial angle (MPTA), medial and lateral joint space widths (mJSW and lJSW, respectively), and medial and lateral joint line convergence angles (JLCA); and lower limb alignment changes using mechanical axis deviation angle (MADA) and the hip-knee-ankle (HKA) angle measured on full-length anteroposterior radiographs of the lower extremity. Correlation analysis and binary logistic regression analysis were performed. Results. Postoperatively, LDTA ( p < 0.001 ) and tibiotalar angle ( p < 0.001 ) significantly changed, indicating meaningful improvement in the ankle joint varus deformity. Regarding the knee joint changes, JLCA significantly changed into valgus direction ( p = 0.044 ). As for lower limb alignment changes, MADA significantly decreased ( p < 0.001 ), whereas the HKA angle significantly increased ( p < 0.001 ). In univariate and multivariate logistic regression analyses, changes in the MADA ( p < 0.001 ) and the HKA angle ( p < 0.001 ) were significantly correlated with the correction angle. Conclusions. SMO remarkably improves ankle joint varus deformity, followed by significant lower limb alignment changes. Despite meaningful changes in JLCA, the relationship between the amount of osteotomy near the ankle joint and improvement in knee joint radiographic parameters was not significant. Radiographic parameters of the knee joint would less likely be changed following SMO.

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Assessment of Ankle Joint Proprioception in Cricket Players

International Journal of Health Sciences and Research ◽

10.52403/ijhsr.20211025 ◽

2021 ◽

Vol 11 (10) ◽

pp. 196-201

Author(s):

Dhruti Mawani ◽

Mayuri Ghumatkar ◽

Ajay Kumar

Keyword(s):

Ankle Joint ◽

Balance Control ◽

Ankle Injuries ◽

Proprioceptive Information ◽

Limb Injuries ◽

Significant Difference ◽

Reproduction Test ◽

The Mean ◽

Clinically Significant ◽

Ankle Proprioception

Background and Aims: Superior balance ability is necessary to achieve the highest competitive level and avoid lower limb injuries. Balance control improvement is one of the most important goals in sports and exercise. Better the balance, better is the performance. Proprioception plays an important role in balance control and ankle proprioception is arguably the most important. Cricket is an evolving sport and it the ankle-foot complex in the only part that comes in contact with the ground which further leads to ankle injuries. Ankle proprioception is altered by sport related injuries or fatigue all of which subsequently leads to altered balance mobility. Ankle injuries often leads to disruption of muscles and tendons with associated damage to inherent mechanoreceptors which detrimentally alters the quality of proprioceptive information required for balance control. This study consists of an assessment of ankle joint proprioception in cricket players using an active to active reproduction test. Methodology: An observational study was conducted among 40 cricket players. Ankle proprioception was assessed using an active to active reproduction test. The mean difference between both the positions were then calculated. Results: The result of this study showed a clinically significant difference in both ankle plantarflexion and ankle dorsiflexion. The results also showed that right sided movements were affected in subjects who are right sided dominant and the same was there for left sided dominant subjects. The mean errors in Right PF and Left PF was 4.15º and 1.75º respectively which signifies that Right PF is affected in cricket players. The mean errors in Right DF and Left DF was 2.825º and 2.025º respectively which signifies that Right DF is more affected than that of Left DF. Conclusion: The ankle proprioception was affected in majority of the individuals. A clinically significant increase is noted in Right PF, Right DF and Left DF. Right plantarflexion was affected more than that of left plantarflexion and right dorsiflexion was affected more than that of left dorsiflexion. Hence, right sided dominant people showed affection in right sided movements and those who were left sided dominant showed affection in left sided movements. These results thus signify that the players are at mild risk of having ankle injuries because ankle proprioception is associated with ankle injuries which then indirectly affects the performance of the player. Key words: Ankle proprioception, Cricket Players, Balance, Active to Active reproduction test.

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Study on the Kinematic characteristics of different level jumpers squatting and jumping under different ground

10.21203/rs.3.rs-506133/v1 ◽

2021 ◽

Author(s):

Hua Hewen

Keyword(s):

Angular Velocity ◽

Ankle Joint ◽

High Speed ◽

Angular Displacement ◽

Group Analysis ◽

Great Influence ◽

Force Platform ◽

Elastic Coefficient ◽

Significant Difference ◽

Different Levels

Abstract Objective: The purpose of this study is to compare the kinematic differences of different level jumping athletes in the process of squatting on different ground, and to reveal the biomechanical mechanism of the effect of squatting on different ground on training effect.Methods: The subjects were 11 first-class and above jumping athletes (excellent group) and 11 second-class athletes (ordinary group). The kinematic data were photographed by SONYDCRHC52E high-speed camera with a sampling frequency of 50 frames per second, and the data were analyzed by SIMI-Motion three-dimensional motion analysis system. The subjects squatted and jumped on four kinds of ground (force platform, balance pad, gymnastics pad and sand) with their hands on their hips.Results: In the intra-group analysis, it was found that the athletes of different levels squatted and jumped on four different kinds of ground, but there was no significant difference only on the balance pad and gymnastics mat (excellent group p=0.344, ordinary group p=1). In the inter-group analysis, it was found that there were significant differences between different levels of athletes in balance pad (p=0.043) and sand (p=0.02). In the buffering stage of squatting jump, there was no significant difference in the buffering angle displacement of lower limb joints of different athletes on different ground. In the stage of pedal and extension, the angular displacement of ankle on the middle platform of the excellent group was significantly different from that of the balance pad (p=0.014), gymnastics pad (p=0.017) and sand (p=0.013), but in the ordinary group, the ankle angular displacement of the middle platform was only significantly different from that of the gymnastics pad (p= 0.048) and sand (p=0.017), but not significantly different from that of the balance pad (p=0.166). The maximum angular velocity of hip joint of athletes of different levels was significantly different among different ground groups. The maximum angular velocity of ankle joint of common group was significantly different in force platform and sand (p=0.032), gymnastics mat and sand (p=0.008), but there was no significant difference in balance pad.Conclusion: Different places have great influence on the ordinary group, and on the ground with lower elastic coefficient, the maximum angular velocity of the ankle joint in the ordinary group is much smaller than that in the excellent group, which indicates that the rapid contractile ability of ankle muscles in the ordinary group is poor on the ground with low elastic coefficient. When squatting and jumping on the ground with lower elastic coefficient, the excellent group has better body control and coordination and lower joint energy loss, which makes the jumping effect better, while the ordinary group squats and jumps on the ground with low elastic coefficient and unstable ground. the jumping effect is poor.

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Changes in Muscle Strategies During Landing Task in Subjects With and Without Knee Genu Varum

Journal of Modern Rehabilitation ◽

10.18502/jmr.v14i2.7708 ◽

2021 ◽

Author(s):

Mahboobeh Azizi ◽

Khosrow Khademi ◽

Mehri Ghasemi ◽

Alireza Akbarzadegan

Keyword(s):

Motor Control ◽

Knee Joint ◽

Lower Limb ◽

Healthy Subjects ◽

Muscle Activation ◽

Control Strategies ◽

Trunk Muscles ◽

Genu Varum ◽

Significant Difference ◽

Offset Time

Introduction: Onset and offset activation of lower limb and trunk muscles may change the knee with genu varum during landing. These motor control strategies can be different from those in healthy subjects and contribute to more injuries in lower extremities. This study aimed to compare the delay time of the onset activity of the abdominal and lower limb muscles in the specific landing task. Materials and Methods: Ten females with genu varum deformity and ten females with normal knee participated in this case-control study. Genu varum deformity was measured by a camera capturing goniometer. The subjects were informed to land by preferred lower limb from a table (30 cm high) on a force plate. Vertical Ground Reaction Force (VGRF) was measured to clarify the onset of the landing task. Surface Electromyography (sEMG) of transverse abdominal/int. oblique (TA/IO), Vastus Medialis (VM), Vastus Lateralis (VL), Lateral Gastrocnemius (LG), and medial gastrocnemius (MG) muscles were recorded during landing. The difference between the onset activity of the above muscles and onset of VGRF was calculated as delay times and compared between muscles and between two groups. Also, the offset of activities and the intensity of muscle activation (normalized RMS) were compared between the two groups. Results: Lower limb and trunk muscles showed significantly different onset of activities in the genu varum group (P<0.05), whereas there was no significant difference in the onset of muscle activities in the healthy group. Results indicated significant differences between two groups in TA/IO, LG, and MG muscles and the genu varum group had longer delay time for motor control strategy (especially ankle strategy) in the landing task. Offset time of all muscles in the genu varum and healthy subjects had a significant difference between muscles, especially in gastrocnemius muscles (P<0.05). Also, there were significant changes between the two groups in LG and MG muscles (P<0.05). Normalized muscle activities (nRMS) generally indicated an increase in muscle activation of genu varum subjects (TA/IO, LG, MG) compared with the normal subjects (P<0.05). Conclusion: Motor control strategies in landing task is different in the genu varum group due to changes in biomechanics and properties of the knee joint. This variation may be due to changes in proprioception afferent pathways around the knee joint. An increase in muscle activation, delay, and offset time of muscle activities in these subjects, indicated that an increase in the degree of freedom may change motor control strategies. Internal anticipation and postural adjustment of the landing task in these subjects need more motor unit recruitment (an increase in nRMS). This deformity in the knee joint might affect some activities and possibly cause knee changes such as osteoarthritis.

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