scholarly journals Arch-Support Induced Changes in Foot-Ankle Coordination in Young Males with Flatfoot during Unplanned Gait Termination

2021 ◽  
Vol 10 (23) ◽  
pp. 5539
Author(s):  
Xuanzhen Cen ◽  
Lidong Gao ◽  
Meimei Yang ◽  
Minjun Liang ◽  
István Bíró ◽  
...  
Keyword(s):  
Statistical Parametric Mapping ◽  
Frontal Plane ◽  
Metatarsophalangeal Joint ◽  
Coordination Pattern ◽  
Long Term Effects ◽  
Gait Termination ◽  
Joint Coordination ◽  
One Dimensional ◽  
Significant Difference ◽  
Arch Support

Objective: The efficacy of arch orthoses in posture adjustment and joint coordination improvement during steady-state gait is well documented; however, the biomechanical changes of gait sub-tasks caused by arch support (AS), especially during gait termination, are poorly understood. Hence, this study aimed to investigate how the acute arch-supporting intervention affects foot–ankle coordination and coordination variability (CV) in individuals with flatfoot during unplanned gait termination (UGT). Methods: Twenty-five male patients with flatfoot were selected as subjects participated in this AS manipulation study. A motion capture system was used for the collection of the metatarsophalangeal joint (MPJ) and ankle kinematics during UGT. MPJ-Ankle coordination and CV were quantified using an optimized vector coding technique during the three sub-phases of UGT. A paired-sample t-test from the one-dimensional statistical parametric mapping of one-dimensional was applied to examine the data significance. Results: Significant differences for the joint kinematics between non-arch-support (NAS) and AS were exhibited only in the MPJ transverse plane during the middle and later periods of UGT (p = 0.04–0.026). Frontal plane MPJ-ankle coordination under AS during stimulus delay significantly decreased from 177.16 ± 27.41° to 157.75 ± 32.54° compared with under NAS (p = 0.026); however, the coordination pattern had not changed. Moreover, no significant difference was found in the coupling angle variability between NAS and AS in three planes during sub-phases of UGT (all p > 0.5). Conclusions: The detailed intrinsic characteristic of AS induced acute changes in lower extremity segment coordination in patients with mild flatfoot has been recorded. This dataset on foot-ankle coordination characteristics during UGT is essential for explaining foot function and injury prediction concerning AS manipulation. Further studies are expected to reflect lower limb inter-joint coordination during gait termination through the long-term effects of AS orthoses.

scholarly journals Effect of UCBL and Medial Longitudinal Arch Support in Balance and Functional Performance in Bilateral Flexible Flat Feet in Patients Aged Between 16 And 20 Years

2021 ◽  
Vol 4 (2) ◽  
Keyword(s):  
Center Of Pressure ◽  
Statistical Significance ◽  
Drop Out ◽  
Random Allocation ◽  
Tibial Rotation ◽  
Long Term Effects ◽  
Functional Parameters ◽  
Flat Feet ◽  
Significant Difference ◽  
Arch Support

Purpose: Moulded foot orthoses have been shown to be successful in treating such injuries and reducing the symptoms by realigning the foot anatomy, controlling excessive pronation and reducing internal tibial rotation. Numerous prophylactics or therapeutic devices, such as motion control shoe, orthoses, orthotic devices, inserts and others, have emerged to limit the pronation range during running. In evaluating the effect of these devices to control pronation during running, orthopaedics and biomechanics researchers often investigate the rearfoot kinematics, or to be specific, the calcaneal motion in respect to the talus bone. Previous researches showed that the effects are still unclear however some orthotic inserts are useful in relieving heel and plantar fasciitis pain. The purpose of this study is to identify among UCBL and Medial Arch Support which is a better prescription option for Pes planus. Materials and Method: An incidental simple randomised sample of 30 participants (30 Bilateral Flexible Flat Feet) were recruited for the study with age range from 16 to 20 years. There were 21 male and 9 female patients in the study. There was no drop out during the study. Participants were allocated to two groups by random allocation based on the fitment of UCBL and arch support (UCBL prescribed for Group A and Medial arch support prescribed for Group B). Pre and post interventional tests- balance and functional parameters was taken before the fitment of orthosis and after four-week of usage of the prescribed orthotic treatment and the said pre and post interventional data was analysed for statistical significance. Result: One-way ANOVA test shows a significant difference between groups at p<0.000. Posttest between the parameters (Berg balance and TUG) shows that UCBL has a high statistical significance than medial arch support in improving balance and functional parameters at p<0.000 at t value -6.942. Conclusion: A comparison of balance and functional parameter results in the tested orthoses indicated that the UCBL orthosis significantly increased the stability of people with flexible flatfoot, and it has improved balance and functional parameters in total among those with flatfeet. It seems that creating mobility in the midfoot area of the foot orthosis may cause a balance disturbance in patients with flatfoot. It is recommended that other balance parameters such as sway of the center of pressure and the long-term effects of orthoses may also be investigated.

scholarly journals Comparison of Transverse Plane Tibial and Frontal Plane Rearfoot Motion and Movement Coordination Between Runners With Medial Tibial Stress Syndrome and Healthy Controls

2020 ◽  
Vol 36 (6) ◽  
pp. 375-380
Author(s):  
Ben Langley ◽  
Nick Knight ◽  
Stewart C. Morrison
Keyword(s):  
Stance Phase ◽  
Statistical Parametric Mapping ◽  
Frontal Plane ◽  
Transverse Plane ◽  
Medial Tibial Stress Syndrome ◽  
Coordination Pattern ◽  
Healthy Controls ◽  
Movement Coordination ◽  
Stress Syndrome ◽  
Rearfoot Motion

Medial tibial stress syndrome (MTSS) is a common running-related injury. Alterations in movement patterns and movement coordination patterns have been linked to the development of overuse injuries. The aim of this study was to compare transverse plane tibial and frontal plane rearfoot motion and the coordination of these movements between runners with MTSS and healthy controls. A total of 10 recreational runners with MTSS and 10 healthy controls ran at 11 km/h on a treadmill. A 3-camera motion analysis system operating at 200 Hz was used to calculate tibia and rearfoot motion. Stance phase motion patterns were compared between groups using multivariate analysis, specifically, Hotelling T2 test with statistical parametric mapping. A modified vector coding technique was used to classify the coordination of transverse plane tibial and frontal plane rearfoot motion. The frequency of each coordination pattern displayed by each group was compared using independent samples t tests. Individuals with MTSS displayed significantly (P = .037, d = 1.00) more antiphase coordination (tibial internal rotation with rearfoot inversion) despite no significant (P > .05) differences in stance phase kinematics. The increased antiphase movement may increase the torsional stress placed upon the medial aspect of the tibia, contributing to the development of MTSS.

scholarly journals A biomechanical comparison of the jerk, back jerk, vertical jump and jump squat

2021 ◽  
Author(s):  
Jiatian Liu
Keyword(s):  
Peak Power ◽  
Muscle Activation ◽  
Vertical Jump ◽  
Gluteus Maximus ◽  
Rectus Femoris ◽  
Sport Performance ◽  
Peak Force ◽  
Coordination Pattern ◽  
Joint Coordination ◽  
Significant Difference

AbstractAlthough weightlifting exercises and their pulling and catching derivatives have been well studied, less is known about the group of weightlifting overhead pressing derivatives (WOPDs). There were two purposes of the present study. Above all, it was to compare WOPDs (i.e. jerk and back jerk) with jump squat in enhancing sport performance such as vertical jump in the perspective of biomechanics. Furthermore, it was to gain a better understanding of the biomechanical difference between jerk and back jerk. The study compared the kinetics, kinematics, and muscle activation of the jerk, back jerk, vertical jump and jump squat. Ground reaction forces, joint angle data and electromyography were collected from 20 track and field athletes while they performed the four movements. The joint coordination pattern and EMG characters of the jump squat were more similar to those of the vertical jump. WOPDs, especially jerk, exhibited less similarity with vertical jump in joint coordination, as well as the subsequent peak activation. The electromyography data demonstrated significant differences in rectus femoris and gluteus maximus in the relative timing of peak activations and the maximum activation. Jump squat was greater in peak force (2211N) than jerk (P < .005), greater peak power (4749W) than jerk and back jerk (P < .001) and no significant difference with WOPDs in rate of force development. Back jerk produced a greater peak force (2223 N), peak power (3767W) and eccentric RFD (15965 N·s−1) than jerk (2061N)(P < .001) (3364W)(P < .05) (12280 N·s−1)(P < .01)and the opposite in concentric RFD that jerk (7702 N·s−1) was greater than back jerk (5972 N·s−1)(P < .05). We can conclude that for runner and jumpers, jump squat was better for improving vertical jump than WOPDs and back jerk is better than jerk in power training.

scholarly journals Treatment of End-Stage Hallux Rigidus and Impact of Arthrodesis versus Arthroplasty on Patient Reported Outcomes

2017 ◽  
Vol 2 (3) ◽  
pp. 2473011417S0001
Author(s):  
Monique Chambers ◽  
MaCalus Hogan ◽  
Dukens LaBaze
Keyword(s):  
Patient Reported Outcomes ◽  
Surgical Intervention ◽  
Metatarsophalangeal Joint ◽  
Hallux Rigidus ◽  
First Metatarsophalangeal Joint ◽  
Significant Difference ◽  
Patient Reported ◽  
Outcome Scores ◽  
Vas Scores ◽  
End Stage

Category: Bunion, Midfoot/Forefoot Introduction/Purpose: Hallux rigidus is a degenerative disease of the first metatarsophalangeal joint. Severe, end-stage hallux rigidus can become debilitating with surgical intervention becoming necessary once conservative measures and shoe modifications have failed. Joint salvage procedures include metatarsal phalangeal (MTP) arthrodesis and MTP arthroplasty. The purpose of this study was to assess for differences in patient reported outcomes in two cohorts who underwent fusion or joint reconstruction. Methods: This study was a retrospective review of prospectively collected data of 385 patients from an academic medical institution. Patients who underwent surgical intervention from July 2015 to November 2016 were identified based on CPT codes for MTP arthrodesis (28750) and arthroplasty (28293). We extracted outcome scores including SF12-M, SF12-P, FAAM, and VAS scores. Exclusion criteria included poly-trauma, revision procedures, and lack of pre and post-operative outcome scores. Mann- Whitney t-test was performed using GraphPad Prism version 7.0b for Mac to compare procedure groups, with significance define by a p-value of 0.05. Results: A total of eighteen patients met the inclusion criteria, with 6 who underwent arthroplasty and 12 arthrodesis. The average age was 63.7 amongst the cohort, with a total of 16 female and 2 males. Patients who underwent arthrodesis had better outcomes across all parameters. When comparing preoperative and postoperative scores, arthrodesis patients showed greater improvement of SF12-M (arthrodesis 9 vs arthroplasty -2, p=0.05), and SF12-P (9 vs -16, respectively p=0.05) scores. Arthroplasty patients were more likely to have a decrease in their SF-12 scores. VAS scores and FAAM scores showed no statistical difference between the two cohorts. Postoperative VAS scores were worse in 33% of arthroplasty patients despite surgical intervention, compared to 10% of arthrodesis patients. Conclusion: Our results suggests that both procedures provide a statistically significant difference in pain with several patients having a Global Rate of Change that is “very much better”. However, fusion of the metatarsophalangeal joint results in improved pain and functional outcomes for patients with severe hallux rigidus. These findings are consistent with current reports in the literature, which are mostly case series reports. Larger studies are needed to provide appropriate power and better support the findings of this study.

scholarly journals Transitional Cell Carcinomas of the Urinary Tract in a Colony of Beagle Dogs

1989 ◽  
Vol 26 (6) ◽  
pp. 455-461 ◽  
Author(s):  
K. J. Nikula ◽  
S. A. Benjamin ◽  
G. M. Angleton ◽  
A. C. Lee
Keyword(s):  
Urinary Tract ◽  
Transitional Cell ◽  
Clinical Signs ◽  
Conclusive Evidence ◽  
Whole Body ◽  
Beagle Dogs ◽  
Long Term Effects ◽  
Significant Difference ◽  
Microscopic Features

Gross and light microscopic features of transitional cell carcinomas (TCC) of the urinary tract were examined in Beagle dogs used for the study of the long-term effects of low-dose, whole-body, 60Co gamma radiation. Thirty-eight cases of TCC occurred among 990 dogs that were from 0 to 14 years of age. There was no conclusive evidence of a radiation effect. The 38 TCC were equally divided between male and female dogs, but there was a significant difference in the sex distribution of urethra-origin TCC. Eleven males had a primary urethral TCC compared to only two females. There was no significant difference between the urethra-origin and bladder-origin TCCs in the number of tumors that caused clinical signs, metastasized, or that contributed to the death of the dog. All cases of urethral TCC in male dogs occurred in the prostatic urethra. The majority of these cases were not recognized to be neoplasms at gross necropsy, but microscopic examination revealed the TCC. Our findings differ from previous reports stating that TCC occurs more frequently in female than male dogs, and they especially differ from reports claiming that urethra-origin TCC is predominately a disease of female dogs.

Insulin Glargine and Risk of Cancer: A Meta-Analysis

2012 ◽  
Vol 27 (3) ◽  
pp. 241-246 ◽  
Author(s):  
Xinli Du ◽  
Rihua Zhang ◽  
Yi Xue ◽  
Dong Li ◽  
Jinmei Cai ◽  
...  
Keyword(s):  
Insulin Glargine ◽  
Fixed Effects ◽  
Meta Analysis ◽  
Long Term Effects ◽  
Open Label ◽  
Cancer Occurrence ◽  
Pubmed Database ◽  
Significant Difference ◽  
The Us ◽  
Risk Of Cancer

Aims Recently, more and more attention has been drawn on the long-term effects of insulin glargine. Here we strived to estimate the association of cancer occurrence with the use of insulin glargine. Methods We searched all the publications regarding the association between cancer occurrence and the use of insulin glargine using the US National Library of Medicine's PubMed database. Data were independently extracted and analyzed using random or fixed effects meta-analysis depending upon the degree of heterogeneity. Results Seven cohort studies were included in the meta-analysis. Cancer occurrence had no significant difference in glargine-treated patients compared to patients treated with other insulins (RR=0.86, 95% CI=0.69–1.07, p=0.17, Pheterogeneity <0.00001). In our subgroup analysis, glargine, compared to other insulins, did not increase the risk of breast cancer (RR=1.14, 95% CI=0.65–2.02, p=0.65, Pheterogeneity=0.002), prostate cancer (RR=1.00, 95% CI=0.79–1.26, p=0.99, Pheterogeneity=0.78), pancreatic cancer (RR=0.57, 95% CI=0.14–2.35, p=0.44, Pheterogeneity=0.0002) and gastrointestinal cancer (RR=0.80, heterogeneity 95% CI=0.62–1.02, p=0.07, Pheterogeneity=0.86). Conclusions This meta-analysis of open-label studies does not support an increased cancer risk in patients treated with insulin glargine. The result provides confidence for the development of insulin glargine, but needs confirmation by further clinical studies.

scholarly journals Lower-Limb Joint Coordination Pattern in Obese Subjects

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Alberto Ranavolo ◽  
Lorenzo M. Donini ◽  
Silvia Mari ◽  
Mariano Serrao ◽  
Alessio Silvetti ◽  
...  
Keyword(s):  
Lower Limb ◽  
Control Group ◽  
Coordination Pattern ◽  
Obese People ◽  
Joint Coordination ◽  
Increased Risk ◽  
Risk Of Falls ◽  
Coupling Parameters ◽  
Obese Subjects ◽  
Time Distance

The coordinative pattern is an important feature of locomotion that has been studied in a number of pathologies. It has been observed that adaptive changes in coordination patterns are due to both external and internal constraints. Obesity is characterized by the presence of excess mass at pelvis and lower-limb areas, causing mechanical constraints that central nervous system could manage modifying the physiological interjoint coupling relationships. Since an altered coordination pattern may induce joint diseases and falls risk, the aim of this study was to analyze whether and how coordination during walking is affected by obesity. We evaluated interjoint coordination during walking in 25 obese subjects as well as in a control group. The time-distance parameters and joint kinematics were also measured. When compared with the control group, obese people displayed a substantial similarity in joint kinematic parameters and some differences in the time-distance and in the coupling parameters. Obese subjects revealed higher values in stride-to-stride intrasubjects variability in interjoint coupling parameters, whereas the coordinative mean pattern was unaltered. The increased variability in the coupling parameters is associated with an increased risk of falls and thus should be taken into account when designing treatments aimed at restoring a normal locomotion pattern.

scholarly journals ASSESSMENT OF PRESURGICAL NASOALVEOLAR MOULDING (PNAM) IN UNILATERAL CLEFT LIP AND PALATE

2020 ◽  
Vol 4 (11) ◽  
Author(s):  
Santosh Kumar
Keyword(s):  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Intervention Group ◽  
Control Group ◽  
Width Ratio ◽  
Long Term Effects ◽  
Important Indicator ◽  
Medical College ◽  
Significant Difference ◽  
Nasoalveolar Molding

Background: Midface symmetry is an important indicator of success of complete unilateral cleft lip and palate (CUCLP) treatment. There is little literature on the long-term effects of Presurgical Nasoalveolar Molding (PNAM) on Midface symmetry in children treated for CUCLP. Material and Methods: This case-control study was carried out in the Department of Burn and Plastic Surgery at Government Medical College and Hospital, Bettiah, Bihar, India from may 2018 to Dec 2019. Complete unilateral CL+P patients had basilar and frontal photographs at two time points: (1) initial (2) postsurgical. 30 nasal molding patients and 20 control patients were included. Presurgical nasal molding was performed prior to primary lip repair in intervention group. No nasal molding was performed in control group. Results: A statistically significant difference was found for postsurgical nostril height-width ratio (P< .05). No other statistically significant differences were found. Conclusion: Nasal molding and surgery resulted in more symmetrical nostril height-width ratios than surgery alone. Alar groove ratios were not statistically significantly different between groups perhaps because application of nasal molding was not early enough; postsurgical nasal splints were not utilized; overcorrection was not performed for nasal molding

scholarly journals Особенности расчета и исследования вольт-эрстедной характеристики анизотропного магниторезистивного датчика

2021 ◽  
Vol 47 (10) ◽  
pp. 19
Author(s):  
В.В. Амеличев ◽  
Д.А. Жуков ◽  
С.И. Касаткин ◽  
Д.В. Костюк ◽  
О.П. Поляков ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Theoretical Calculation ◽  
Supply Voltage ◽  
Magnetization Distribution ◽  
Theoretical Studies ◽  
Magnetic Field Sensors ◽  
One Dimensional ◽  
Significant Difference ◽  
Current Value ◽  
Experimental And Theoretical Studies

The results of experimental and theoretical studies of the influence of the current value on the characteristics of anisotropic magnetoresistive magnetic field sensors based on FeNiCo alloy with a "barber-polе" structure are presented. A significant difference was found between the volt-oersted characteristics of the forward and reverse strokes with an increase in the intrinsic current caused by the input supply voltage at sufficiently high external magnetic fields. A theoretical calculation of the volt-oersted characteristic was carried out within the framework of the model of one-dimensional heterogeneity of the magnetization distribution, which coincides with the experimental curves of the forward path.

scholarly journals A kinematics analysis of the lower limb during running with different sports shoes

2018 ◽  
Vol 233 (1) ◽  
pp. 46-52
Author(s):  
Lin Fu ◽  
Yaodong Gu ◽  
Qichang Mei ◽  
Julien S Baker ◽  
Justin Fernandez
Keyword(s):  
Lower Limb ◽  
External Rotation ◽  
Statistical Significance ◽  
Frontal Plane ◽  
3D Motion Analysis ◽  
Significant Difference ◽  
Running Shoes ◽  
Knee Abduction ◽  
Analysis System ◽  
Sports Shoes

The study aimed to investigate the differences in lower limb joint angles during running with three different sports shoes: basketball shoes, football shoes, and running shoes. Fifteen male subjects (age: 25 ± 2.2 years, height: 1.79 ± 0.05 m, and mass: 70.8 ± 3.4 kg) were asked to run on a treadmill at their preferred running speed. The Vicon 3D motion analysis system was used to capture the kinematics of the lower extremity during running. A one-way analysis of variance was used to determine whether any statistical significance existed between the three types of shoes (α < 0.05). Significant differences existed in the lower limb joints between the three sports shoes, particularly at the knee joint. Running shoes presented more knee flexion than basketball shoes and football shoes. In the frontal plane, basketball shoes showed less knee abduction than running shoes and football shoes. No significant difference occurred in ankle external rotation between basketball shoes and football shoes, and both of them presented greater range of motion of the ankle and knee than running shoes.

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