keyword
https://read.qxmd.com/read/38491176/improved-measurement-of-disease-progression-in-people-living-with-early-parkinson-s-disease-using-digital-health-technologies
#1
JOURNAL ARTICLE
Matthew D Czech, Darryl Badley, Liuqing Yang, Jie Shen, Michelle Crouthamel, Tairmae Kangarloo, E Ray Dorsey, Jamie L Adams, Josh D Cosman
BACKGROUND: Digital health technologies show promise for improving the measurement of Parkinson's disease in clinical research and trials. However, it is not clear whether digital measures demonstrate enhanced sensitivity to disease progression compared to traditional measurement approaches. METHODS: To this end, we develop a wearable sensor-based digital algorithm for deriving features of upper and lower-body bradykinesia and evaluate the sensitivity of digital measures to 1-year longitudinal progression using data from the WATCH-PD study, a multicenter, observational digital assessment study in participants with early, untreated Parkinson's disease...
March 15, 2024: Commun Med (Lond)
https://read.qxmd.com/read/38481467/towards-in-field-assessment-of-humeral-and-scapular-kinematics-a-comparison-between-laboratory-and-field-settings-using-inertial-sensors
#2
JOURNAL ARTICLE
Jackson Lordall, Opeyemi Vincent Akinluyi, Angelica E Lang
INTRODUCTION: Inertial measurement units allow for quantitative assessment of body motion in many environments. Determining the ability to measure upper limb motion with inertial measurement units, leveraging procedures traditionally used in the lab such as scapular calibration procedures and humeral axial rotation calculation, would expand the opportunities to assess upper limb function in externally valid environments. This study examined if humeral and scapular motion measured in different field settings is consistent with motion measured in a lab setting in similar tasks...
2024: Frontiers in sports and active living
https://read.qxmd.com/read/38475210/imus-can-estimate-hip-and-knee-range-of-motion-during-walking-tasks-but-are-not-sensitive-to-changes-in-load-or-grade
#3
JOURNAL ARTICLE
AuraLea Fain, Ayden McCarthy, Bradley C Nindl, Joel T Fuller, Jodie A Wills, Tim L A Doyle
The ability to estimate lower-extremity mechanics in real-world scenarios may untether biomechanics research from a laboratory environment. This is particularly important for military populations where outdoor ruck marches over variable terrain and the addition of external load are cited as leading causes of musculoskeletal injury As such, this study aimed to examine (1) the validity of a minimal IMU sensor system for quantifying lower-extremity kinematics during treadmill walking and running compared with optical motion capture (OMC) and (2) the sensitivity of this IMU system to kinematic changes induced by load, grade, or a combination of the two...
March 5, 2024: Sensors
https://read.qxmd.com/read/38475190/sensor-fusion-for-underwater-vehicle-navigation-compensating-misalignment-using-lie-theory
#4
JOURNAL ARTICLE
Da Bin Jeong, Nak Yong Ko
This paper presents a sensor fusion method for navigation of unmanned underwater vehicles. The method combines Lie theory into Kalman filter to estimate and compensate for the misalignment between the sensors: inertial navigation system and Doppler Velocity Log (DVL). In the process and measurement model equations, a 3-dimensional Euclidean group (SE(3)) and 3-sphere space (S3) are used to express the pose (position and attitude) and misalignment, respectively. SE(3) contains position and attitude transformation matrices, and S3 comprises unit quaternions...
March 3, 2024: Sensors
https://read.qxmd.com/read/38475162/breath-measurement-method-for-synchronized-reproduction-of-biological-tones-in-an-augmented-reality-auscultation-training-system
#5
JOURNAL ARTICLE
Yukiko Kono, Keiichiro Miura, Hajime Kasai, Shoichi Ito, Mayumi Asahina, Masahiro Tanabe, Yukihiro Nomura, Toshiya Nakaguchi
An educational augmented reality auscultation system (EARS) is proposed to enhance the reality of auscultation training using a simulated patient. The conventional EARS cannot accurately reproduce breath sounds according to the breathing of a simulated patient because the system instructs the breathing rhythm. In this study, we propose breath measurement methods that can be integrated into the chest piece of a stethoscope. We investigate methods using the thoracic variations and frequency characteristics of breath sounds...
March 1, 2024: Sensors
https://read.qxmd.com/read/38475148/intraoperative-angle-measurement-of-anatomical-structures-a-systematic-review
#6
REVIEW
João Cruz, Sérgio B Gonçalves, Manuel Cassiano Neves, Hugo Plácido Silva, Miguel Tavares Silva
Ensuring precise angle measurement during surgical correction of orientation-related deformities is crucial for optimal postoperative outcomes, yet there is a lack of an ideal commercial solution. Current measurement sensors and instrumentation have limitations that make their use context-specific, demanding a methodical evaluation of the field. A systematic review was carried out in March 2023. Studies reporting technologies and validation methods for intraoperative angular measurement of anatomical structures were analyzed...
March 1, 2024: Sensors
https://read.qxmd.com/read/38475055/inertial-measuring-system-to-evaluate-gait-parameters-and-dynamic-alignments-for-lower-limb-amputation-subjects
#7
JOURNAL ARTICLE
Shao-Li Han, Meng-Lin Cai, Min-Chun Pan
The study aims to construct an inertial measuring system for the application of amputee subjects wearing a prosthesis. A new computation scheme to process inertial data by installing seven wireless inertial sensors on the lower limbs was implemented and validated by comparing it with an optical motion capture system. We applied this system to amputees to verify its performance for gait analysis. The gait parameters are evaluated to objectively assess the amputees' prosthesis-wearing status. The Madgwick algorithm was used in the study to correct the angular velocity deviation using acceleration data and convert it to quaternion...
February 26, 2024: Sensors
https://read.qxmd.com/read/38475041/optimization-of-torque-control-model-for-quasi-direct-drive-knee-exoskeleton-robots-based-on-regression-forecasting
#8
JOURNAL ARTICLE
Yuxuan Xia, Wei Wei, Xichuan Lin, Jiaqian Li
The choice of torque curve in lower-limb enhanced exoskeleton robots is a key problem in the control of lower-limb exoskeleton robots. As a human-machine coupled system, mapping from sensor data to joint torque is complex and non-linear, making it difficult to accurately model using mathematical tools. In this research study, the knee torque data of an exoskeleton robot climbing up stairs were obtained using an optical motion-capture system and three-dimensional force-measuring tables, and the inertial measurement unit (IMU) data of the lower limbs of the exoskeleton robot were simultaneously collected...
February 26, 2024: Sensors
https://read.qxmd.com/read/38475017/adaptive-lifting-index-ali-for-real-time-instrumental-biomechanical-risk-assessment-concepts-mathematics-and-first-experimental-results
#9
JOURNAL ARTICLE
Alberto Ranavolo, Arash Ajoudani, Giorgia Chini, Marta Lorenzini, Tiwana Varrecchia
When performing lifting tasks at work, the Lifting Index ( LI ) is widely used to prevent work-related low-back disorders, but it presents criticalities pertaining to measurement accuracy and precision. Wearable sensor networks, such as sensorized insoles and inertial measurement units, could improve biomechanical risk assessment by enabling the computation of an adaptive LI ( aLI ) that changes over time in relation to the actual method of carrying out lifting. This study aims to illustrate the concepts and mathematics underlying aLI computation and compare aLI calculations in real-time using wearable sensors and force platforms with the LI estimated with the standard method used by ergonomists and occupational health and safety technicians...
February 24, 2024: Sensors
https://read.qxmd.com/read/38475012/impact-aware-foot-motion-reconstruction-and-ramp-stair-detection-using-one-foot-mounted-inertial-measurement-unit
#10
JOURNAL ARTICLE
Yisen Wang, Katherine H Fehr, Peter G Adamczyk
Motion reconstruction using wearable sensors enables broad opportunities for gait analysis outside laboratory environments. Inertial Measurement Unit (IMU)-based foot trajectory reconstruction is an essential component of estimating the foot motion and user position required for any related biomechanics metrics. However, limitations remain in the reconstruction quality due to well-known sensor noise and drift issues, and in some cases, limited sensor bandwidth and range. In this work, to reduce drift in the height direction and handle the impulsive velocity error at heel strike, we enhanced the integration reconstruction with a novel kinematic model that partitions integration velocity errors into estimates of acceleration bias and heel strike vertical velocity error...
February 24, 2024: Sensors
https://read.qxmd.com/read/38474989/relationship-of-knee-abduction-moment-to-trunk-and-lower-extremity-segment-acceleration-during-sport-specific-movements
#11
JOURNAL ARTICLE
Mitchell Ekdahl, Sophia Ulman, Lauren Butler
The knee abduction moment (KAM) has been identified as a significant predictor of anterior cruciate ligament (ACL) injury risk; however, the cost and time demands associated with collecting three-dimensional (3D) kinetic data have prompted the need for alternative solutions. Wearable inertial measurement units (IMUs) have been explored as a potential solution for quantitative on-field assessment of injury risk. Most previous work has focused on angular velocity data, which are highly susceptible to bias and noise relative to acceleration data...
February 23, 2024: Sensors
https://read.qxmd.com/read/38474980/biomechanical-effects-of-using-a-passive-exoskeleton-for-the-upper-limb-in-industrial-manufacturing-activities-a-pilot-study
#12
JOURNAL ARTICLE
Armando Coccia, Edda Maria Capodaglio, Federica Amitrano, Vittorio Gabba, Monica Panigazzi, Gaetano Pagano, Giovanni D'Addio
This study investigates the biomechanical impact of a passive Arm-Support Exoskeleton (ASE) on workers in wool textile processing. Eight workers, equipped with surface electrodes for electromyography (EMG) recording, performed three industrial tasks, with and without the exoskeleton. All tasks were performed in an upright stance involving repetitive upper limbs actions and overhead work, each presenting different physical demands in terms of cycle duration, load handling and percentage of cycle time with shoulder flexion over 80°...
February 23, 2024: Sensors
https://read.qxmd.com/read/38474963/a-clustering-based-approach-to-functional-and-biomechanical-parameters-recorded-with-a-pair-of-smart-eyeglasses-in-older-adults-in-order-to-determine-physical-performance-groups
#13
JOURNAL ARTICLE
Justine Hellec, Serge S Colson, Amyn Jaafar, Olivier Guérin, Frédéric Chorin
Falls and frailty status are often associated with a decline in physical capacity and multifactorial assessment is highly recommended. Based on the functional and biomechanical parameters measured during clinical tests with an accelerometer integrated into smart eyeglasses, the purpose was to characterize a population of older adults through an unsupervised analysis into different physical performance groups. A total of 84 participants (25 men and 59 women) over the age of sixty-five (age: 74.17 ± 5.80 years; height: 165...
February 22, 2024: Sensors
https://read.qxmd.com/read/38474914/the-impact-of-postures-and-moving-directions-in-fire-evacuation-in-a-low-visibility-environment
#14
JOURNAL ARTICLE
Jingjing Yan, Gengen He, Anahid Basiri, Craig Hancock, Siegfried K Yeboah
Walking speed is a significant aspect of evacuation efficiency, and this speed varies during fire emergencies due to individual physical abilities. However, in evacuations, it is not always possible to keep an upright posture, hence atypical postures, such as stoop walking or crawling, may be required for survival. In this study, a novel 3D passive vision-aided inertial system (3D PVINS) for indoor positioning was used to track the movement of 20 volunteers during an evacuation in a low visibility environment...
February 21, 2024: Sensors
https://read.qxmd.com/read/38456810/hybrid-soft-rigid-active-prosthetics-laboratory-exercise-for-hands-on-biomechanical-and-biomedical-engineering-education
#15
JOURNAL ARTICLE
Run Ze Gao, Peter Lee, Aravind Ravi, Carolyn Ren, Clark R Dickerson, James Tung
This paper introduces an hands-on laboratory exercise focused on assembling and testing a hybrid soft-rigid active finger prosthetic for biomechanical and biomedical engineering education. This hands-on laboratory activity focuses on the design of a myoelectric finger prosthesis, integrating mechanical, electrical, sensor (i.e., inertial measurement units, electromyography), pneumatics, and embedded software concepts. We expose students to a hybrid soft-rigid robotic system, offering a flexible, modifiable lab activity that can be tailored to instructors' needs and curriculum requirements...
March 8, 2024: Journal of Biomechanical Engineering
https://read.qxmd.com/read/38455383/design-simulation-and-testing-of-a-tunable-mems-multi-threshold-inertial-switch
#16
JOURNAL ARTICLE
Qiu Xu, Rodrigo T Rocha, Yousef Algoos, Eric Feron, Mohammad I Younis
This paper presents a tunable multi-threshold micro-electromechanical inertial switch with adjustable threshold capability. The demonstrated device combines the advantages of accelerometers in providing quantitative acceleration measurements and g-threshold switches in saving power when in the inactive state upon experiencing acceleration below the thresholds. The designed proof-of-concept device with two thresholds consists of a cantilever microbeam and two stationary electrodes placed at different positions in the sensing direction...
2024: Microsystems & Nanoengineering
https://read.qxmd.com/read/38449788/robust-human-locomotion-and-localization-activity-recognition-over-multisensory
#17
JOURNAL ARTICLE
Danyal Khan, Mohammed Alonazi, Maha Abdelhaq, Naif Al Mudawi, Asaad Algarni, Ahmad Jalal, Hui Liu
Human activity recognition (HAR) plays a pivotal role in various domains, including healthcare, sports, robotics, and security. With the growing popularity of wearable devices, particularly Inertial Measurement Units (IMUs) and Ambient sensors, researchers and engineers have sought to take advantage of these advances to accurately and efficiently detect and classify human activities. This research paper presents an advanced methodology for human activity and localization recognition, utilizing smartphone IMU, Ambient, GPS, and Audio sensor data from two public benchmark datasets: the Opportunity dataset and the Extrasensory dataset...
2024: Frontiers in Physiology
https://read.qxmd.com/read/38446782/an-affordable-and-immersive-virtual-reality-based-exercise-therapy-in-forward-head-posture
#18
JOURNAL ARTICLE
Afsoon Asadzadeh, Zahra Salahzadeh, Taha Samad-Soltani, Peyman Rezaei-Hachesu
Forward Head Posture (FHP) is one of the most commonly occurring musculoskeletal abnormalities. Despite exercise therapy being an effective approach for FHP treatment, it can be long, monotonous, and tedious. Virtual reality (VR) can be used as an innovative solution to address these challenges. We designed an affordable and immersive VR-based exercise therapy (VRET) system for FHP correction. The VRET contents (i.e., exercises and VR scenarios) were determined by physiotherapists and game designers at the focus group meetings...
2024: PloS One
https://read.qxmd.com/read/38446111/kinematic-analysis-of-preparation-for-transferring-from-wheelchair-to-bed
#19
JOURNAL ARTICLE
Hikaru Kondo, Soichiro Koyama, Yohei Otaka, Nobuhiro Kumazawa, Shotaro Furuzawa, Yoshikiyo Kanada, Shigeo Tanabe
This study aimed to clarify the kinematics, particularly of the shoulder and hip joints, during preparation for manual wheelchair-to-bed transfer (i.e. when flipping up the arm and foot supports). This cross-sectional study included 32 able-bodied individuals. The kinematics of the shoulder and hip joints when the arm and foot supports were flipped up of manual wheelchair, were evaluated using a markerless inertial sensor-based motion capture system. We found that flipping the arm support upwards involved a large amount of abduction, internal and external rotation, flexion, and extension at the shoulder joint, whereas flipping the foot support upwards involved a large amount of flexion at the hip joint...
March 6, 2024: Assistive Technology: the Official Journal of RESNA
https://read.qxmd.com/read/38442043/an-opensim-based-closed-loop-biomechanical-wrist-model-for-subject-specific-pathological-tremor-simulation
#20
JOURNAL ARTICLE
Wellington C Pinheiro, Henrique B Ferraz, Maria Claudia F Castro, Luciano L Menegaldo
OBJECTIVE: A pathological tremor (PT) is an involuntary rhythmic movement of varying frequency and amplitude that affects voluntary motion, thus compromising individuals' independence. A comprehensive model incorporating PT's physiological and biomechanical aspects can enhance our understanding of the disorder and provide valuable insights for therapeutic approaches. This study aims to build a biomechanical model of pathological tremors using OpenSim's realistic musculoskeletal representation of the human wrist with two degrees of freedom...
March 5, 2024: IEEE Transactions on Neural Systems and Rehabilitation Engineering
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