1
|
Glanville J, Bates KT, Brown D, Potts D, Curran J, Fichera S. Evaluation of a cadaveric wrist motion simulator using marker-based X-ray reconstruction of moving morphology. PeerJ 2024; 12:e17179. [PMID: 38803578 PMCID: PMC11129696 DOI: 10.7717/peerj.17179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 04/05/2024] [Indexed: 05/29/2024] Open
Abstract
Surgical intervention is a common option for the treatment of wrist joint arthritis and traumatic wrist injury. Whether this surgery is arthrodesis or a motion preserving procedure such as arthroplasty, wrist joint biomechanics are inevitably altered. To evaluate effects of surgery on parameters such as range of motion, efficiency and carpal kinematics, repeatable and controlled motion of cadaveric specimens is required. This study describes the development of a device that enables cadaveric wrist motion to be simulated before and after motion preserving surgery in a highly controlled manner. The simulator achieves joint motion through the application of predetermined displacements to the five major tendons of the wrist, and records tendon forces. A pilot experiment using six wrists aimed to evaluate its accuracy and reproducibility. Biplanar X-ray videoradiography (BPVR) and X-Ray Reconstruction of Moving Morphology (XROMM) were used to measure overall wrist angles before and after total wrist arthroplasty. The simulator was able to produce flexion, extension, radioulnar deviation, dart thrower's motion and circumduction within previously reported functional ranges of motion. Pre- and post-surgical wrist angles did not significantly differ. Intra-specimen motion trials were repeatable; root mean square errors between individual trials and average wrist angle and tendon force profiles were below 1° and 2 N respectively. Inter-specimen variation was higher, likely due to anatomical variation and lack of wrist position feedback. In conclusion, combining repeatable intra-specimen cadaveric motion simulation with BPVR and XROMM can be used to determine potential effects of motion preserving surgeries on wrist range of motion and biomechanics.
Collapse
Affiliation(s)
- Joanna Glanville
- School of Engineering, University of Liverpool, Liverpool, Merseyside, United Kingdom
- Department of Musculoskeletal & Ageing Science, University of Liverpool, Liverpool, Merseyside, United Kingdom
| | - Karl T. Bates
- Department of Musculoskeletal & Ageing Science, University of Liverpool, Liverpool, Merseyside, United Kingdom
| | - Daniel Brown
- Liverpool Orthopaedic and Trauma Service, Liverpool University Hospitals, Liverpool, Merseyside, United Kingdom
| | - Daniel Potts
- School of Engineering, University of Liverpool, Liverpool, Merseyside, United Kingdom
| | - John Curran
- School of Engineering, University of Liverpool, Liverpool, Merseyside, United Kingdom
| | - Sebastiano Fichera
- School of Engineering, University of Liverpool, Liverpool, Merseyside, United Kingdom
| |
Collapse
|
2
|
Mohseni M, Zargarzadeh S, Arjmand N. Multi-task artificial neural networks and their extrapolation capabilities to predict full-body 3D human posture during one- and two-handed load-handling activities. J Biomech 2024; 162:111884. [PMID: 38043495 DOI: 10.1016/j.jbiomech.2023.111884] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 11/20/2023] [Accepted: 11/23/2023] [Indexed: 12/05/2023]
Abstract
Machine-learning based human posture-prediction tools can potentially be robust alternatives to motion capture measurements. Existing posture-prediction approaches are confined to two-handed load-handling activities performed at heights below 120 cm from the floor and to predicting a limited number of body-joint coordinates/angles. Moreover, the extrapolating power of these tools beyond the range of the input dataset they were trained for (e.g., for underweight, overweight, or left-handed individuals) has not been investigated. In this study, we trained/validated/tested two posture-prediction (for full-body joint coordinates and angles) artificial neural networks (ANNs) using both 70%/15%/15% random-hold-out and leave-one-subject-out methods, based on a comprehensive kinematic dataset of forty-one full-body skin markers collected from twenty right-handed normal-weight (BMI = 18-26 kg/m2) subjects. Subjects performed 204 one- and two-handed unloaded activities at different vertical (0 to 180 cm from the floor) and horizontal (up to 60 cm lateral and/or anterior) destinations. Subsequently, the extrapolation capability of the trained/validated/tested ANNs was evaluated using data collected from fifteen additional subjects (unseen by the ANNs); three individuals in five groups: underweight, overweight, obese, left-handed individuals, and subjects with a hand-load. Results indicated that the ANNs predicted body joint coordinates and angles during various activities with errors of ∼ 25 mm and ∼ 10°, respectively; considerable improvements when compared to previous posture-prediction ANNs. Extrapolation errors of our ANNs generally remained within the error range of existing ANNs with obesity and being left-handed having, respectively, the most and least compromising effects on their accuracy. These easy-to-use ANNs appear, therefore, to be robust alternatives to common posture-measurement approaches.
Collapse
Affiliation(s)
- Mahdi Mohseni
- Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran
| | - Sadra Zargarzadeh
- Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran
| | - Navid Arjmand
- Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran.
| |
Collapse
|
3
|
Chen Z, Mat Jais IS, Teng SL, McGrouther DA. Understanding the biomechanics of the forearm during the dart thrower's motion. J Hand Surg Eur Vol 2023; 48:757-761. [PMID: 37066631 DOI: 10.1177/17531934231166351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/18/2023]
Abstract
This study investigated the contribution of different forearm muscles, namely the flexor carpi ulnaris, extensor carpi radialis longus and brevis, extensor carpi ulnaris and flexor carpi radialis, during the dart thrower's motion. Thirteen healthy participants were recruited. The forearm muscle activation patterns during the dart thrower's motion were measured using surface electromyography. The average root mean square for the extensor carpi ulnaris was found to be the highest during the dart thrower's motion. Muscle activations during the dart thrower's motion were heterogeneous among the participants. The results suggest the rehabilitation protocol for patients with wrist injuries should be reconsidered.
Collapse
Affiliation(s)
- Zhiqing Chen
- Occupational Therapy Department, Singapore General Hospital, Singapore
| | | | - Shi Lei Teng
- Research Office (Biomechanics Lab), Singapore General Hospital, Singapore
| | | |
Collapse
|
4
|
Robinson PG, Carson HJ, Richards J, Murray A, Duckworth AD, Campbell D. What differences exist between the lead and trail wrist in extensor carpi ulnaris activity and golf swing joint kinematics in sub-elite golfers? J Sports Sci 2023; 41:1596-1604. [PMID: 37983261 DOI: 10.1080/02640414.2023.2285121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Accepted: 11/11/2023] [Indexed: 11/22/2023]
Abstract
This study assessed the lead and trail arm peak and average extensor carpi ulnaris (ECU) muscle activity in association with tri-planar angular velocities of the lead and trail wrists during the golf swing. Fifteen sub-elite, male right-handed golfers (Mage = 34.7 years ±13.3, Mhandicap = 1.5 ± 2.2) were recruited to execute five shots each with their pitching wedge, 7-iron and driver clubs in an indoor golf simulator. Surface electromyography (EMG) sensors were placed over the ECU muscle belly and inertial measurement unit sensors were placed bi-laterally on the distal forearm and dorsum of the hand. There was a statistically greater recruitment of the trail ECU muscle during the downswing (p < 0.001) for all clubs. The lead ECU muscle was recruited more during the backswing (p < 0.001) and follow through (p < 0.024) phases. There were statistically different tri-planar movement patterns between the lead and trail wrist throughout all three phases of the golf swing. No significant relationships were found between downswing EMG data and clubhead kinematics at impact. In conclusion, differing wrist kinematics and associated muscle activity may contribute to the asymmetrical injury pattern seen clinically.
Collapse
Affiliation(s)
- Patrick G Robinson
- Edinburgh Orthopaedics, Royal Infirmary of Edinburgh, UK
- European Tour Health and Performance Institute, Virginia, UK
| | - Howie J Carson
- Human Performance Science Research Group, Institute for Sport, Physical Education and Health Sciences, Moray House School of Education and Sport, The University of Edinburgh, Edinburgh, UK
| | - Jim Richards
- Allied Health Research unit, Faculty of Allied Health and Wellbeing, University of Central Lancashire, Preston, UK
| | - Andrew Murray
- European Tour Health and Performance Institute, Virginia, UK
- Medical Commission, International Golf Federation, Lausanne, Switzerland
- UK Collaborating Centre for Illness and Injury Prevention in Sport - International Olympic Committee Research Centre, University of Edinburgh, UK
| | - Andrew D Duckworth
- Edinburgh Orthopaedics, Royal Infirmary of Edinburgh, UK
- UK Collaborating Centre for Illness and Injury Prevention in Sport - International Olympic Committee Research Centre, University of Edinburgh, UK
- Usher Institute, University of Edinburgh, Edinburgh, UK
| | - Doug Campbell
- European Tour Health and Performance Institute, Virginia, UK
- Spire Leeds Hospital, Leeds, UK
| |
Collapse
|
5
|
Sulkar HJ, Knighton TW, Amoafo L, Aliaj K, Kolz CW, Zhang Y, Hermans T, Henninger HB. In Vitro Simulation of Shoulder Motion Driven by Three-Dimensional Scapular and Humeral Kinematics. J Biomech Eng 2022; 144:051008. [PMID: 34817051 PMCID: PMC8822462 DOI: 10.1115/1.4053099] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 11/12/2021] [Indexed: 11/08/2022]
Abstract
In vitro simulation of three-dimensional (3D) shoulder motion using in vivo kinematics obtained from human subjects allows investigation of clinical conditions in the context of physiologically relevant biomechanics. Herein, we present a framework for laboratory simulation of subject-specific kinematics that combines individual 3D scapular and humeral control in cadavers. The objectives were to: (1) robotically simulate seven healthy subject-specific 3D scapulothoracic and glenohumeral kinematic trajectories in six cadavers, (2) characterize system performance using kinematic orientation accuracy and repeatability, and muscle force repeatability metrics, and (3) analyze effects of input kinematics and cadaver specimen variability. Using an industrial robot to orient the scapula range of motion (ROM), errors with repeatability of ±0.1 mm and <0.5 deg were achieved. Using a custom robot and a trajectory prediction algorithm to orient the humerus relative to the scapula, orientation accuracy for glenohumeral elevation, plane of elevation, and axial rotation of <3 deg mean absolute error (MAE) was achieved. Kinematic accuracy was not affected by varying input kinematics or cadaver specimens. Muscle forces over five repeated setups showed variability typically <33% relative to the overall simulations. Varying cadaver specimens and subject-specific human motions showed effects on muscle forces, illustrating that the system was capable of differentiating changes in forces due to input conditions. The anterior and middle deltoid, specifically, showed notable variations in patterns across the ROM that were affected by subject-specific motion. This machine provides a platform for future laboratory studies to investigate shoulder biomechanics and consider the impacts of variable input kinematics from populations of interest, as they can significantly impact study outputs and resultant conclusions.
Collapse
Affiliation(s)
- Hema J. Sulkar
- Department of Orthopaedics, University of Utah, Salt Lake City, UT 84108; Department of Biomedical Engineering, University of Utah, Salt Lake City, UT 84112
| | - Tyler W. Knighton
- Department of Orthopaedics, University of Utah, Salt Lake City, UT 84108; Department of Mechanical Engineering, University of Utah, Salt Lake City, UT 84112
| | - Linda Amoafo
- Department of Epidemiology, University of Utah, Salt Lake City, UT 84132
| | - Klevis Aliaj
- Department of Orthopaedics, University of Utah, Salt Lake City, UT 84108; Department of Biomedical Engineering, University of Utah, Salt Lake City, UT 84112
| | - Christopher W. Kolz
- Department of Orthopaedics, University of Utah, Salt Lake City, UT 84108; Department of Biomedical Engineering, University of Utah, Salt Lake City, UT 84112
| | - Yue Zhang
- Department of Epidemiology, University of Utah, Salt Lake City, UT 84132
| | - Tucker Hermans
- Department of Mechanical Engineering, University of Utah, Salt Lake City, UT 84112; Robotics Center and School of Computing, University of Utah, Salt Lake City, UT 84112
| | - Heath B. Henninger
- Department of Orthopaedics, University of Utah, Salt Lake City, UT 84108; Department of Biomedical Engineering, University of Utah, Salt Lake City, UT 84112; Department of Mechanical Engineering, University of Utah, Salt Lake City, UT 84112
| |
Collapse
|
6
|
Razavian RS, Dreyfuss D, Katakura M, Horwitz MD, Kedgley AE. An in vitro hand simulator for simultaneous control of hand and wrist movements. IEEE Trans Biomed Eng 2021; 69:975-982. [PMID: 34495828 DOI: 10.1109/tbme.2021.3110893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A human hand is a complex biomechanical system, in which bones, ligaments, and musculotendon units dynamically interact to produce seemingly simple motions. A new physiological hand simulator has been developed, in which electromechanical actuators apply load to the tendons of extrinsic hand and wrist muscles to recreate movements in cadaveric specimens in a biofidelic way. This novel simulator simultaneously and independently controls the movements of the wrist (flexion/extension and radio-ulnar deviation) and flexion/extension of the fingers and thumb. Control of these four degrees of freedom (DOF) is made possible by actuating eleven extrinsic muscles of the hand. The coupled dynamics of the wrist, fingers, and thumb, and the over-actuated nature of the human musculoskeletal system make feedback control of hand movements challenging. Two control algorithms were developed and tested. The optimal controller relies on an optimization algorithm to calculate the required tendon tensions using the collective error in all DOFs, and the action-based controller loads the tendons solely based on their actions on the controlled DOFs (e.g., activating all flexors if a flexing moment is required). Both controllers resulted in hand movements with small errors from the reference trajectories (<3.4); however, the optimal controller achieved this with 16% lower total force. Owing to its simpler structure, the action-based controller was extended to enable feedback control of grip force. This simulator has been shown to be a highly repeatable tool (<0.25 N and <0.2 variations in force and kinematics, respectively) for in vitro analyses of human hand biomechanics.
Collapse
|
7
|
Padmore CE, Chan AHW, Langohr GDG, Johnson JA, Suh N. The Effect of Forearm Position on Wrist Joint Biomechanics. J Hand Surg Am 2021; 46:425.e1-425.e10. [PMID: 33303325 DOI: 10.1016/j.jhsa.2020.10.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 08/02/2020] [Accepted: 10/14/2020] [Indexed: 02/02/2023]
Abstract
PURPOSE All active motion wrist joint simulators have been designed to simulate physiologic wrist motion; however, a main difference among them is the orientation of the forearm (horizontal or vertical with respect to gravity). Moreover, the effect of forearm orientation on experimental results has yet to be quantified, but it may be an important variable. Thus, the purpose of this study was to determine the effect of forearm orientation on wrist kinematics and contact mechanics. METHODS Eight cadaveric upper limbs were cycled through a flexion-extension motion using an active motion wrist simulator. Motion trials were performed in 3 forearm orientations (gravity-neutral, gravity-flexion, and gravity-extension). A computed tomography-based joint congruency technique was used to examine radiocarpal joint contact and joint contact centroid translation in the 3 tested orientations. RESULTS At full wrist extension and wrist flexion, radioscaphoid contact area was greatest in the gravity-extension orientation. Radiolunate contact area was similar among all 3 forearm orientations. The radioscaphoid contact centroid was consistent among the 3 tested positions with the wrist in neutral wrist position. In contrast, the radioscaphoid contact centroid translated radially in the gravity-neutral position relative to the gravity-flexion position in extreme extension. There were no differences in radiolunate centroid contact position in the 3 forearm orientations. CONCLUSIONS This study demonstrates that forearm orientation affects contact mechanics and end-range carpal kinematics. Future biomechanical studies should report forearm orientation and discuss the implication of the forearm orientation used on the experimental results. CLINICAL RELEVANCE This study provides evidence that the wrist joint is sensitive to forearm positions consistent with activities of daily living and rehabilitation protocols.
Collapse
Affiliation(s)
- Clare E Padmore
- Department of Biomedical Engineering, Roth-McFarlane Hand and Upper Limb Centre, St. Joseph's Health Care Western University, London, Ontario, Canada
| | - Andrea H W Chan
- Division of Plastics, University Health Network University of Toronto, Toronto, Ontario, Canada; Division of Orthopaedic Surgery, Toronto Western Hospital Hand Clinic, University Health Network University of Toronto, Toronto, Ontario, Canada
| | - G Daniel G Langohr
- Department of Mechanical and Materials Engineering, Western University, London, Ontario, Canada
| | - James A Johnson
- Department of Mechanical and Materials Engineering, Roth-McFarlane Hand and Upper Limb Centre, St. Joseph's Health Care Western University, London, Ontario, Canada
| | - Nina Suh
- Division of Orthopaedic Surgery, Roth-McFarlane Hand and Upper Limb Centre, St. Joseph's Health Care Western University, London, Ontario, Canada; Department of Biomedical Engineering, Roth-McFarlane Hand and Upper Limb Centre, St. Joseph's Health Care Western University, London, Ontario, Canada.
| |
Collapse
|
8
|
Shah DS, Horwitz MD, Kedgley AE. Extensor retinaculum excision does not affect wrist tendon forces: a cadaveric simulator study. J Hand Surg Eur Vol 2020; 45:986-988. [PMID: 32507003 PMCID: PMC7583437 DOI: 10.1177/1753193420928781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Darshan S. Shah
- Department of Bioengineering, Imperial College London, London, UK
| | - Maxim D. Horwitz
- Department of Hand Surgery, Chelsea and Westminster Hospital, London, UK
| | - Angela E. Kedgley
- Department of Bioengineering, Imperial College London, London, UK, Twitter handles: @akedgley, @maximhorwitz
| |
Collapse
|
9
|
Shah DS, Middleton C, Gurdezi S, Horwitz MD, Kedgley AE. The Effect of Surgical Treatments for Trapeziometacarpal Osteoarthritis on Wrist Biomechanics: A Cadaver Study. J Hand Surg Am 2020; 45:389-398. [PMID: 31733980 PMCID: PMC7198980 DOI: 10.1016/j.jhsa.2019.10.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/01/2018] [Revised: 07/06/2019] [Accepted: 10/01/2019] [Indexed: 02/02/2023]
Abstract
PURPOSE Studies have shown the effects of surgical treatments for trapeziometacarpal osteoarthritis on thumb biomechanics; however, the biomechanical effects on the wrist have not been reported. This study aimed to quantify alterations in wrist muscle forces following trapeziectomy with or without ligament reconstruction and replacement. METHODS A validated physiological wrist simulator replicated cyclic wrist motions in cadaveric specimens by applying tensile loads to 6 muscles. Muscle forces required to move the intact wrist were compared with those required after performing trapeziectomy, suture suspension arthroplasty, prosthetic replacement, and ligament reconstruction with tendon interposition (LRTI). RESULTS Trapeziectomy required higher abductor pollicis longus forces in flexion and higher flexor carpi radialis forces coupled with lower extensor carpi ulnaris forces in radial deviation. Of the 3 surgical reconstructions tested post-trapeziectomy, wrist muscle forces following LRTI were closest to those observed in the intact case throughout the range of all simulated motions. CONCLUSIONS This study shows that wrist biomechanics were significantly altered following trapeziectomy, and of the reconstructions tested, LRTI most closely resembled the intact biomechanics in this cadaveric model. CLINICAL RELEVANCE Trapeziectomy, as a standalone procedure in the treatment of trapeziometacarpal osteoarthritis, may result in the formation of a potentially unfilled trapezial gap, leading to higher wrist muscle forces. This biomechanical alteration could be associated with clinically important outcomes, such as pain and/or joint instability.
Collapse
Affiliation(s)
- Darshan S. Shah
- Department of Bioengineering, Imperial College London, London, United Kingdom
| | - Claire Middleton
- Department of Hand Surgery, Chelsea and Westminster Hospital, London, United Kingdom
| | - Sabahat Gurdezi
- Department of Hand Surgery, Chelsea and Westminster Hospital, London, United Kingdom
| | - Maxim D. Horwitz
- Department of Hand Surgery, Chelsea and Westminster Hospital, London, United Kingdom
| | - Angela E. Kedgley
- Department of Bioengineering, Imperial College London, London, United Kingdom,Corresponding author: Angela E. Kedgley, MS. PhD, Department of Bioengineering, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom.
| |
Collapse
|
10
|
Cheng Y, Li G, Li J, Sun Y, Jiang G, Zeng F, Zhao H, Chen D. Visualization of activated muscle area based on sEMG. JOURNAL OF INTELLIGENT & FUZZY SYSTEMS 2020. [DOI: 10.3233/jifs-179549] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Yangwei Cheng
- Key Laboratory of Metallurgical Equipment and Control of Ministry of Education, Wuhan University of Science and Technology, Wuhan, China
| | - Gongfa Li
- Key Laboratory of Metallurgical Equipment and Control of Ministry of Education, Wuhan University of Science and Technology, Wuhan, China
- Institute of Precision Manufacturing, Wuhan University of Science and Technology, Wuhan, China
- Research Center for Biomimetic Robot and Intelligent Measurement and Control, Wuhan University of Science and Technology, Wuhan, China
| | - Jiahan Li
- Key Laboratory of Metallurgical Equipment and Control of Ministry of Education, Wuhan University of Science and Technology, Wuhan, China
| | - Ying Sun
- Key Laboratory of Metallurgical Equipment and Control of Ministry of Education, Wuhan University of Science and Technology, Wuhan, China
- Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering, Wuhan University of Science and Technology, Wuhan, China
| | - Guozhang Jiang
- Key Laboratory of Metallurgical Equipment and Control of Ministry of Education, Wuhan University of Science and Technology, Wuhan, China
- Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering, Wuhan University of Science and Technology, Wuhan, China
| | - Fei Zeng
- Key Laboratory of Metallurgical Equipment and Control of Ministry of Education, Wuhan University of Science and Technology, Wuhan, China
- Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering, Wuhan University of Science and Technology, Wuhan, China
| | - Haoyi Zhao
- Key Laboratory of Metallurgical Equipment and Control of Ministry of Education, Wuhan University of Science and Technology, Wuhan, China
| | - Disi Chen
- School of Computing, University of Portsmouth, Portsmouth PO1 3HE, UK
| |
Collapse
|
11
|
A Multifunctional Wearable Device with a Graphene/Silver Nanowire Nanocomposite for Highly Sensitive Strain Sensing and Drug Delivery. C — JOURNAL OF CARBON RESEARCH 2019. [DOI: 10.3390/c5020017] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Advances in wearable, highly sensitive and multifunctional strain sensors open up new opportunities for the development of wearable human interface devices for various applications such as health monitoring, smart robotics and wearable therapy. Herein, we present a simple and cost-effective method to fabricate a multifunctional strain sensor consisting of a skin-mountable dry adhesive substrate, a robust sensing component and a transdermal drug delivery system. The sensor has high piezoresisitivity to monitor real-time signals from finger bending to ulnar pulse. A transdermal drug delivery system consisting of polylactic-co-glycolic acid nanoparticles and a chitosan matrix is integrated into the sensor and is able to release the nanoparticles into the stratum corneum at a depth of ~60 µm. Our approach to the design of multifunctional strain sensors will lead to the development of cost-effective and well-integrated multifunctional wearable devices.
Collapse
|
12
|
Shah DS, Middleton C, Gurdezi S, Horwitz MD, Kedgley AE. Alterations to wrist tendon forces following flexor carpi radialis or ulnaris sacrifice: a cadaveric simulator study. J Hand Surg Eur Vol 2018; 43:886-888. [PMID: 29950135 PMCID: PMC6139988 DOI: 10.1177/1753193418783176] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Darshan S. Shah
- Department of Bioengineering, Imperial College London, London, UK
| | - Claire Middleton
- Department of Hand Surgery, Chelsea and Westminster Hospital, London, UK
| | - Sabahat Gurdezi
- Department of Hand Surgery, Chelsea and Westminster Hospital, London, UK
| | - Maxim D. Horwitz
- Department of Hand Surgery, Chelsea and Westminster Hospital, London, UK
| | | |
Collapse
|
13
|
Lu SC, Vereecke EE, Synek A, Pahr DH, Kivell TL. A novel experimental design for the measurement of metacarpal bone loading and deformation and fingertip force. PeerJ 2018; 6:e5480. [PMID: 30221084 PMCID: PMC6138040 DOI: 10.7717/peerj.5480] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Accepted: 07/30/2018] [Indexed: 12/15/2022] Open
Abstract
Background Musculoskeletal and finite element modelling are often used to predict joint loading and bone strength within the human hand, but there is a lack of in vitro evidence of the force and strain experienced by hand bones. Methods This study presents a novel experimental setup that allows the positioning of a cadaveric digit in a variety of postures with the measurement of force and strain experienced by the third metacarpal. The setup allows for the measurement of fingertip force as well. We tested this experimental setup using three cadaveric human third digits in which the flexor tendons were loaded in two tendon pathways: (1) parallel to the metacarpal bone shaft, with bowstringing; (2) a semi-physiological condition in which the tendons were positioned closer to the bone shaft. Results There is substantial variation in metacarpal net force, metacarpal strain and fingertip force between the two tendon pathways. The net force acting on the metacarpal bone is oriented palmarly in the parallel tendon condition, causing tension along the dorsum of the metacarpal shaft, while the force increases and is oriented dorsally in the semi-physiological condition, causing compression of the dorsal metacarpal shaft. Fingertip force is also greater in the semi-physiological condition, implying a more efficient grip function. Inter-individual variation is observed in the radioulnar orientation of the force experienced by the metacarpal bone, the fingertip force, and the strain patterns on the metacarpal shaft. Conclusion This study demonstrates a new method for measuring force and strain experienced by the metacarpal, and fingertip force in cadaveric digits that can, in turn, inform computation models. Inter-individual variation in loads experienced by the third digit suggest that there are differences in joint contact and/or internal bone structure across individuals that are important to consider in clinical and evolutionary contexts.
Collapse
Affiliation(s)
- Szu-Ching Lu
- Animal Postcranial Evolution Lab, Skeletal Biology Research Centre, School of Anthropology and Conservation, University of Kent, Canterbury, UK
| | - Evie E Vereecke
- Department of Development and Regeneration, University of Leuven, Kortrijk, Belgium
| | - Alexander Synek
- Institute of Lightweight Design and Structural Biomechanics, Vienna University of Technology, Vienna, Austria
| | - Dieter H Pahr
- Institute of Lightweight Design and Structural Biomechanics, Vienna University of Technology, Vienna, Austria.,Department of Anatomy and Biomechanics, Karl Landsteiner Private University of Health Sciences, Krems an der Donau, Austria
| | - Tracy L Kivell
- Animal Postcranial Evolution Lab, Skeletal Biology Research Centre, School of Anthropology and Conservation, University of Kent, Canterbury, UK.,Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany
| |
Collapse
|
14
|
Shah DS, Middleton C, Gurdezi S, Horwitz MD, Kedgley AE. The importance of abductor pollicis longus in wrist motions: A physiological wrist simulator study. J Biomech 2018; 77:218-222. [PMID: 30054091 PMCID: PMC6085116 DOI: 10.1016/j.jbiomech.2018.07.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Revised: 07/01/2018] [Accepted: 07/04/2018] [Indexed: 11/29/2022]
Abstract
The abductor pollicis longus (APL) is one of the primary radial deviators of the wrist, owing to its insertion at the base of the first metacarpal and its large moment arm about the radioulnar deviation axis. Although it plays a vital role in surgical reconstructions of the wrist and hand, it is often neglected while simulating wrist motions in vitro. The aim of this study was to observe the effects of the absence of APL on the distribution of muscle forces during wrist motions. A validated physiological wrist simulator was used to replicate cyclic planar and complex wrist motions in cadaveric specimens by applying tensile loads to six wrist muscles - flexor carpi radialis (FCR), flexor carpi ulnaris, extensor carpi radialis longus (ECRL), extensor carpi radialis brevis, extensor carpi ulnaris (ECU) and APL. Resultant muscle forces for active wrist motions with and without actuating the APL were compared. The absence of APL resulted in higher forces in FCR and ECRL - the synergists of APL - and lower forces in ECU - the antagonist of APL. The altered distribution of wrist muscle forces observed in the absence of active APL control could significantly alter the efficacy of in vitro experiments conducted on wrist simulators, in particular when investigating those surgical reconstructions or rehabilitation of the wrist heavily reliant on the APL, such as treatments for basal thumb osteoarthritis.
Collapse
Affiliation(s)
- Darshan S Shah
- Department of Bioengineering, Imperial College London, London, United Kingdom.
| | - Claire Middleton
- Department of Hand Surgery, Chelsea and Westminster Hospital, London, United Kingdom.
| | - Sabahat Gurdezi
- Department of Hand Surgery, Chelsea and Westminster Hospital, London, United Kingdom
| | - Maxim D Horwitz
- Department of Hand Surgery, Chelsea and Westminster Hospital, London, United Kingdom.
| | - Angela E Kedgley
- Department of Bioengineering, Imperial College London, London, United Kingdom.
| |
Collapse
|
15
|
Wrist tendon moment arms: Quantification by imaging and experimental techniques. J Biomech 2018; 68:136-140. [PMID: 29306550 PMCID: PMC5793998 DOI: 10.1016/j.jbiomech.2017.12.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 12/13/2017] [Accepted: 12/17/2017] [Indexed: 11/25/2022]
Abstract
Subject-specific musculoskeletal models require accurate values of muscle moment arms. The aim of this study was to compare moment arms of wrist tendons obtained from non-invasive magnetic resonance imaging (MRI) to those obtained from an in vitro experimental approach. MRI was performed on ten upper limb cadaveric specimens to obtain the centrelines for the flexor carpi radialis (FCR), flexor carpi ulnaris (FCU), extensor carpi radialis longus (ECRL), extensor carpi radialis brevis (ECRB), extensor carpi ulnaris (ECU), and abductor pollicis longus (APL) tendons. From these, the anatomical moment arms about each of the flexion-extension (FE) and radioulnar deviation (RUD) axes of the wrist were calculated. Specimens were mounted on a physiologic wrist simulator to obtain functional measurements of the moment arms using the tendon excursion method. No differences were observed between anatomical and functional values of the FE and RUD moment arms of FCR, ECRL and ECRB, and the RUD moment arm of ECU (p > .075). Scaling the anatomical moment arms relative to ECRB in FE and ECU in RUD reduced differences in the FE moment arm of FCU and the RUD moment arm of APL to less than 15% (p > .139). However, differences persisted in moment arms of FCU in RUD, and ECU and APL in FE (p < .008). This study shows that while measurements of moment arms of wrist tendons using imaging do not always conform to values obtained using in vitro experimental approaches, a stricter protocol could result in the acquisition of subject-specific moment arms to personalise musculoskeletal models.
Collapse
|
16
|
Importance of Consistent Datasets in Musculoskeletal Modelling: A Study of the Hand and Wrist. Ann Biomed Eng 2017; 46:71-85. [PMID: 28971327 PMCID: PMC5754461 DOI: 10.1007/s10439-017-1936-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 09/20/2017] [Indexed: 11/15/2022]
Abstract
Hand musculoskeletal models provide a valuable insight into the loads withstood by the upper limb; however, their development remains challenging because there are few datasets describing both the musculoskeletal geometry and muscle morphology from the elbow to the finger tips. Clinical imaging, optical motion capture and microscopy were used to create a dataset from a single specimen. Subsequently, a musculoskeletal model of the wrist was developed based on these data to estimate muscle tensions and to demonstrate the potential of the provided parameters. Tendon excursions and moment arms predicted by this model were in agreement with previously reported experimental data. When simulating a flexion–extension motion, muscle forces reached 90 N among extensors and a co-contraction of flexors, amounting to 62.6 N, was estimated by the model. Two alternative musculoskeletal models were also created based on anatomical data available in the literature to illustrate the effect of combining incomplete datasets. Compared to the initial model, the intensities and load sharing of the muscles estimated by the two alternative models differed by up to 180% for a single muscle. This confirms the importance of using a single source of anatomical data when developing such models.
Collapse
|