scholarly journals Mobile Applications in Evaluations of Knee Joint Kinematics: A Pilot Study

Sensors ◽  
2019 ◽  
Vol 19 (17) ◽  
pp. 3675 ◽  
Author(s):  
Lisiński ◽  
Wareńczak ◽  
Hejdysz ◽  
Sip ◽  
Gośliński ◽  
...  
Keyword(s):  
Knee Joint ◽  
Mobile Devices ◽  
Home Environment ◽  
Mobile Applications ◽  
Inertial Sensors ◽  
Qualitative And Quantitative ◽  
Study Results ◽  
Left Lower Limb ◽  
Knee Joint Kinematics ◽  
The Right

Because medical professionals lack the means to monitor exercises performed by patients in their home environment directly, there is a strong case for introducing technological solutions into this domain. They include methods that use wireless inertial sensors, which emit signals recorded and processed by special applications that work with mobile devices. This paper’s aim is (a) to evaluate whether such sensors are suitable for qualitative and quantitative motion analysis, and (b) to determine the repeatability of results over a few recordings. Knee joint activity was analysed using a system of inertial sensors connected through a Wi-Fi network to mobile devices. The tested individuals did eight different activities, all of which engaged the knee joint. Each excercise was repeated three times. Study results did not reveal any statistically significant differences between the three measurements for most of the studied parameters. Furthermore, in almost every case, there were no statistically significant differences between the results of the right and left lower limb (p > 0.05). This study shows that easy use and repeatability of results combined with the feature of quantitative and qualitative analysis make the examined method useful for functional evaluations of the knee joint.

A Perspective of Adoption of Mobile Applications in Rural India

2014 ◽  
Vol 5 (1) ◽  
pp. 62-77
Author(s):  
Debasish Roy
Keyword(s):  
Mobile Applications ◽  
Strong Influence ◽  
Success Factors ◽  
Positive Impact ◽  
Ease Of Use ◽  
Perceived Usefulness ◽  
Rural People ◽  
Bank Account ◽  
Study Results ◽  
The Right

Rural mobile application are designed for various purposes, ranging from reaching information regarding government schemes, agricultural best practices, market prices, fishing zones and weather forecasts, to facilitating money transfer, opening and operating a bank account for saving money and to receive money directly to the bank account for various government schemes and subsidies. This paper examines the critical success factors and inhibitors that affect adoption of the mobile applications and the effect on continued usage. A questionnaire survey was done to gather data for this study. Results indicate that last mile barriers act as inhibitors to adoption. Adoption behavior of rural people do not exhibit a correlation with the ease of use of the application. Social influence has a strong influence on adoption behavior, which will enable policy makers and practitioners to evolve the right penetration strategy. Perceived usefulness has a strong influence on adoption. The results reiterate the increasing positive impact of rural mobile applications on day to day working of rural people.

CHARACTERISTICS OF FRICTION RIDGE SKIN OF THE FINGERS IN ELDERLY WOMEN

2020 ◽  
pp. 69-74
Author(s):  
А. А. Романенко ◽  
С. Н. Деревцова
Keyword(s):  
Elderly Women ◽  
The Elderly ◽  
Left Hand ◽  
Qualitative And Quantitative ◽  
Hardware Complex ◽  
Study Results ◽  
Left And Right ◽  
Bilateral Differences ◽  
The Right ◽  
Quantitative Indicators

Цель - изучение качественных и количественных показателей папиллярных узоров дистальных фаланг пальцев рук у женщин пожилого возраста. Материал и методы. С помощью аппаратно-программного комплекса (АПК) «Малахит» определены типы кожного узора (дуга, радиальная петля, ульнарная петля и завиток), распространенность каждого типа на пальцах правой и левой руки, симметричность на гомологичных пальцах у 169 женщин пожилого возраста. Составлены формулы распределения для каждого типа узора на пальцах обеих рук. Статистический анализ результатов обследования проведен с использованием пакета прикладных программ SPSS 22.0. Результаты. Чаще регистрировались ульнарные петли, вторую группу по распространенности составили завитковые узоры, радиальные петли и дуги вошли в группу наиболее редких узоров. Выявлены статистически значимые билатеральные различия в распространенности завитковых и дуговых узоров на пальцах правой и левой кисти: наибольшее количество завитков зарегистрировано на пальцах правой кисти, дуговых узоров - на пальцах левой кисти. Чаще всего симметричные узоры регистрировали на V пальцах, значимо реже на II пальцах. Выводы. Изученные признаки папиллярных узоров являются маркерами, характеризующими особенности рельефа гребешковой кожи на дистальных фалангах пальцев рук у женщин пожилого возраста. Objective - to study the qualitative and quantitative indicators of papillary patterns of the elderly women distal phalanges. Material and methods. Papillary patterns were studied with the help of the «Malachite» software-hardware complex. Types of friction ridge patterns (arc, radial and ulnar loops, whorl) were determined; the prevalence of each type of pattern on all fingers of the right and left hands and the symmetry of friction ridge patterns on homologous fingers were studied in 169 elderly women. Formulas for each type of pattern on the fingers of both hands were developed. Statistical analysis of the study results was performed using the SPSS 22.0 software Results. The ulnar loops were recorded most frequently; the second most frequently found were whorls and radial loops, and radial loops and arcs were the rarest patterns. Statistically significant bilateral differences were found in the prevalence of whorls and arcs on fingers of left and right hands: the largest number of whorls was recorded on the fingers of the right hand, the largest number of arcs - on the fingers of the left hand. The symmetrical patterns were most frequently found on the fifth fingers, and significantly less frequent - on the second fingers. Conclusions. The studied features of skin patterns are markers that are characteristic for the ridged skin of the distal phalanges of elderly women.

scholarly journals IMU-Based Effects Assessment of the Use of Foot Orthoses in the Stance Phase during Running and Asymmetry between Extremities

Sensors ◽  
2021 ◽  
Vol 21 (9) ◽  
pp. 3277
Author(s):  
Juan Luis Florenciano Restoy ◽  
Jordi Solé-Casals ◽  
Xantal Borràs-Boix
Keyword(s):  
Contact Time ◽  
Stance Phase ◽  
Inertial Sensors ◽  
Sagittal Plane ◽  
Plantar Flexion ◽  
Foot Orthoses ◽  
Foot Kinematics ◽  
Running Injuries ◽  
The Right ◽  
Movement Differences

The objectives of this study were to determine the amplitude of movement differences and asymmetries between feet during the stance phase and to evaluate the effects of foot orthoses (FOs) on foot kinematics in the stance phase during running. In total, 40 males were recruited (age: 43.0 ± 13.8 years, weight: 72.0 ± 5.5 kg, height: 175.5 ± 7.0 cm). Participants ran on a running treadmill at 2.5 m/s using their own footwear, with and without the FOs. Two inertial sensors fixed on the instep of each of the participant’s footwear were used. Amplitude of movement along each axis, contact time and number of steps were considered in the analysis. The results indicate that the movement in the sagittal plane is symmetric, but that it is not in the frontal and transverse planes. The right foot displayed more degrees of movement amplitude than the left foot although these differences are only significant in the abduction case. When FOs are used, a decrease in amplitude of movement in the three axes is observed, except for the dorsi-plantar flexion in the left foot and both feet combined. The contact time and the total step time show a significant increase when FOs are used, but the number of steps is not altered, suggesting that FOs do not interfere in running technique. The reduction in the amplitude of movement would indicate that FOs could be used as a preventive tool. The FOs do not influence the asymmetry of the amplitude of movement observed between feet, and this risk factor is maintained. IMU devices are useful tools to detect risk factors related to running injuries. With its use, even more personalized FOs could be manufactured.

Movement direction impacts knee joint kinematics during elliptical exercise at varying incline angles

The Knee ◽  
2021 ◽  
Vol 29 ◽  
pp. 201-207
Author(s):  
Erik T. Hummer ◽  
Eryn N. Murphy ◽  
David N. Suprak ◽  
Lorrie R. Brilla ◽  
Jun G. San Juan
Keyword(s):  
Knee Joint ◽  
Joint Kinematics ◽  
Movement Direction ◽  
Knee Joint Kinematics

In Vivo Tracking of the Human Patella Using Cine Phase Contrast Magnetic Resonance Imaging

1999 ◽  
Vol 121 (6) ◽  
pp. 650-656 ◽  
Author(s):  
F. T. Sheehan ◽  
F. E. Zajac ◽  
J. E. Drace
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Knee Joint ◽  
Phase Contrast ◽  
Three Dimensional ◽  
Resonance Imaging ◽  
Contrast Magnetic Resonance ◽  
Knee Joint Kinematics ◽  
Cine Phase Contrast

Improper patellar tracking is often considered to be the cause of patellar-femoral pain. Unfortunately, our knowledge of patellar-femoral-tibial (knee) joint kinematics is severely limited due to a lack of three-dimensional, noninvasive, in vivo measurement techniques. This study presents the first large-scale, dynamic, three-dimensional, noninvasive, in vivo study of nonimpaired knee joint kinematics during volitional leg extensions. Cine-phase contrast magnetic resonance imaging was used to measure the velocity profiles of the patella, femur, and tibia in 18 unimpaired knees during leg extensions, resisted by a 34 N weight. Bone displacements were calculated through integration and then converted into three-dimensional orientation angles. We found that the patella displaced laterally, superiorly, and anteriorly as the knee extended. Further, patellar flexion lagged knee flexion, patellar tilt was variable, and patellar rotation was fairly constant throughout extension.

Neuropsychological Assessment of a Case of Early Right Hemiplegia: Qualitative and Quantitative Analysis

1984 ◽  
Vol 59 (3) ◽  
pp. 1007-1010 ◽  
Author(s):  
Daniela Brizzolara ◽  
Anna Maria Chilosi ◽  
Gianni Luigi De Nobili ◽  
Giovanni Ferretti
Keyword(s):  
Quantitative Analysis ◽  
Neuropsychological Assessment ◽  
Normal Development ◽  
Right Hemisphere ◽  
Qualitative And Quantitative Analysis ◽  
Qualitative And Quantitative ◽  
Perceptual Skills ◽  
Left Brain ◽  
Linguistic Functions ◽  
The Right

Evidence for normal development of linguistic but poor visuo-perceptual skills has been obtained with the neuropsychological assessment of a case of early left-brain injury. Data suggest the transfer of linguistic functions from the left to the right hemisphere at the expense of visuo-perceptual capacities for which the right hemisphere is potentially specialized.

scholarly journals The role of intra-articular neuronal CCR2 receptors in knee joint pain associated with experimental osteoarthritis in mice

2021 ◽  
Vol 23 (1) ◽  
Author(s):  
Shingo Ishihara ◽  
Alia M. Obeidat ◽  
David L. Wokosin ◽  
Dongjun Ren ◽  
Richard J. Miller ◽  
...  
Keyword(s):  
Knee Joint ◽  
Sensory Neuron ◽  
Sensory Neurons ◽  
Direct Stimulation ◽  
Sensory Afferents ◽  
Neuronal Marker ◽  
The Right ◽  
Experimental Osteoarthritis ◽  
In Vivo Calcium Imaging

Abstract Background C–C chemokine receptor 2 (CCR2) signaling plays a key role in pain associated with experimental murine osteoarthritis (OA) after destabilization of the medial meniscus (DMM). Here, we aimed to assess if CCR2 expressed by intra-articular sensory neurons contributes to knee hyperalgesia in the early stages of the model. Methods DMM surgery was performed in the right knee of 10-week-old male wild-type (WT), Ccr2 null, or Ccr2RFP C57BL/6 mice. Knee hyperalgesia was measured using a Pressure Application Measurement device. CCR2 receptor antagonist (CCR2RA) was injected systemically (i.p.) or intra-articularly (i.a.) at different times after DMM to test its ability to reverse knee hyperalgesia. In vivo Ca2+ imaging of the dorsal root ganglion (DRG) was performed to assess sensory neuron responses to CCL2 injected into the knee joint cavity. CCL2 protein in the knee was measured by ELISA. Ccr2RFP mice and immunohistochemical staining for the pan-neuronal marker, protein gene product 9.5 (PGP9.5), or the sensory neuron marker, calcitonin gene-related peptide (CGRP), were used to visualize the location of CCR2 on intra-articular afferents. Results WT, but not Ccr2 null, mice displayed knee hyperalgesia 2–16 weeks after DMM. CCR2RA administered i.p. alleviated established hyperalgesia in WT mice 4 and 8 weeks after surgery. Intra-articular injection of CCL2 excited sensory neurons in the L4-DRG, as determined by in vivo calcium imaging; responses to CCL2 increased in mice 20 weeks after DMM. CCL2, but not vehicle, injected i.a. rapidly caused transient knee hyperalgesia in naïve WT, but not Ccr2 null, mice. Intra-articular CCR2RA injection also alleviated established hyperalgesia in WT mice 4 and 7 weeks after surgery. CCL2 protein was elevated in the knees of both WT and Ccr2 null mice 4 weeks after surgery. Co-expression of CCR2 and PGP9.5 as well as CCR2 and CGRP was observed in the lateral synovium of naïve mice; co-expression was also observed in the medial compartment of knees 8 weeks after DMM. Conclusions The findings suggest that CCL2-CCR2 signaling locally in the joint contributes to knee hyperalgesia in experimental OA, and it is in part mediated through direct stimulation of CCR2 expressed by intra-articular sensory afferents.

Specificity of using messengers by schoolchildren and students in mobile learning

Ergodesign ◽  
2021 ◽  
Vol 0 (3) ◽  
pp. 197-204
Author(s):  
Pavel Paderno ◽  
Elizaveta Stroeva
Keyword(s):  
High School ◽  
High School Students ◽  
Mobile Applications ◽  
Online Survey ◽  
Online Communication ◽  
School Students ◽  
Study Results ◽  
The Russian Federation ◽  
Goals And Objectives ◽  
Positive Effect

The aim of the work is to identify the functionality required by mobile messengers for convenient online communication between pupils and high school students. To achieve this aim, a survey of 116 questions was developed, which adjusted to the respondent’s answers and reduced its volume in order to avoid the respondents’ fatigue and to decrease the time spent on completing the survey. An online survey of students aged 16 to 24 living in different cities of the Russian Federation was carried out. Then the information obtained was processed, and possible relations between the analysis results were found. Based on the study results, recommendations were formed to improve messengers according to the students- users’ goals and objectives. Now messengers are created mainly for the widespread use. There are already more than a hundred of them, and therefore products need to stand out in order to be competitive. One of the ways to excel is to be narrowly focused, tailored to a specific audience. Since the functionality of the messenger directly affects its popularity, the introduction and refinement of the necessary functions will have a positive effect on the number of users. The analysis shows that developers of instant messengers can improve the efficiency of using messengers by the students and, possibly, reduce the number of installed mobile applications on their devices, and, consequently, decrease the number of competitors for their target audience.

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