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https://www.readbyqxmd.com/read/28814053/mobio-a-5-dof-trans-humeral-robotic-prosthesis
#1
R Achintha M Abayasiri, D G Kanishka Madusanka, N M P Arachchige, A T S Silva, R A R C Gopura
In this paper, a 5 DOF trans-humeral robotic prosthesis: MoBio is proposed. MoBio includes 2 DOF at wrist which is rare in other trans-humeral prostheses. Through anthropometric features MoBio prosthetic arm can achieve elbow flexion/extension, forearm supination/pronation, wrist radial/ulnar deviation, wrist flexion/extension and compound motion of thumb and index finger. An EMG based control method which uses EMG signals of the biceps brachii and triceps brachii, is used with a motion switching mechanism to control the prosthesis...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813980/human-mimetic-forearm-mechanism-towards-bionic-arm
#2
Minsang Seo, Hogyun Kim, Youngjin Choi
The paper presents a mechanical forearm mechanism to extend the pronation and supination (P/S) movement of the trans-radial amputee when he/she is able to conduct the P/S motion partially with his/her remaining forearm. The P/S motions of the existing prostheses and robotic arms developed till now are completely different from those of the human. When we are to develop the robotic prostheses for the amputees, two important issues should be considered such as cosmetic issue to look like normal arm and motion harmony issue between robotic prosthesis and the amputated living arm...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813887/the-effects-of-age-and-amplitude-on-wrist-proprioceptive-acuity
#3
Francesca Marini, Charmayne M L Hughes, Pietro Morasso, Lorenzo Masia
This study examined wrist proprioception in a cross-sectional sample of 44 children aged between 8-to 14-years and a control group of 10 neurologically and physically healthy adults. Using a 3-degrees of freedom robotic device, participants performed an ipsilateral joint position matching task in which target amplitude (40% or 80% functional range of motion [fRoM]) and degrees-of-freedom (Flexion/Extension [FE], Radial/Ulnar deviation [RUD], Pronation/Supination [PS]) were manipulated. Results indicated that proprioceptive function became more accurate and consistent over the developmental spectrum, but that the ability to utilize proprioceptive feedback did not reach adult levels till the age of 10-11 years...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28807512/non-linear-finite-element-model-to-assess-the-effect-of-tendon-forces-on-the-foot-ankle-complex
#4
Enrique Morales-Orcajo, Thales R Souza, Javier Bayod, Estevam Barbosa de Las Casas
A three-dimensional foot finite element model with actual geometry and non-linear behavior of tendons is presented. The model is intended for analysis of the lower limb tendon forces effect in the inner foot structure. The geometry of the model was obtained from computational tomographies and magnetic resonance images. Tendon tissue was characterized with the first order Ogden material model based on experimental data from human foot tendons. Kinetic data was employed to set the load conditions. After model validation, a force sensitivity study of the five major foot extrinsic tendons was conducted to evaluate the function of each tendon...
August 11, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28807347/dorsoradial-instability-of-the-thumb-metacarpophalangeal-joint-a-biomechanical-investigation
#5
Byung-Sung Kim, Alex Doermann, Michelle McGarry, Masaki Akeda, Hansel Ihn, Thay Q Lee
PURPOSE: To define the role of the dorsal capsule and associated dorsal fibrocartilage (DFC) and their interactions with the radial collateral ligament (RCL) as a thumb metacarpophalangeal (MCP) joint stabilizer. METHODS: Eight cadaveric thumbs were mounted onto a custom jig with 20 N of muscle load applied. The thumb position in space was digitized to measure ulnar-radial, pronation-supination, and volar-dorsal laxity at 0°, 30°, and 60° MCP joint flexion. Serial sectioning was performed and measurements were repeated for the intact state, proper RCL insufficiency, proper and accessory (complete) RCL insufficiency, complete RCL with 50% DFC (radial) insufficiency, and complete RCL with complete DFC insufficiency...
August 11, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28803901/the-cubital-tunnel-syndrome-caused-by-the-intraneural-or-extraneural-ganglion-cysts-case-report-and-review-of-the-literature
#6
Wen Kai Chang, Yong Ping Li, Deng Feng Zhang, Bing Sheng Liang
Cubital tunnel syndrome is the second most common nerve compression syndrome in peripheral nerve compression disease. Although potential ulnar nerve entrapment can occur at multiple points along its course, such as the arcade of struthers, the medial intermuscular septum, the medial epicondyle, the cubital tunnel, and the deep flexor pronator aponeurosis, the most common site of entrapment is the cubital tunnel. However, cubital tunnel syndrome could also be caused by the occupying masses along the course of ulnar nerve, such as intraneural or extraneural ganglia...
July 6, 2017: Journal of Plastic, Reconstructive & Aesthetic Surgery: JPRAS
https://www.readbyqxmd.com/read/28774254/can-physical-examination-create-a-stener-lesion
#7
Manesha Lankachandra, John P Eggers, James W Bogener, Richard L Hutchison
BACKGROUND: The purpose of this study is to determine whether a Stener lesion can be created while testing stability of the ulnar collateral ligament (UCL) of the thumb. Testing was performed in a manner that reproduced clinical examination. METHODS: Six fresh frozen hand and forearm specimens underwent sequential sectioning of the accessory UCL, the proper UCL, and the ulnar sagittal band. Measurements of radial deviation of the metacarpophalangeal (MCP) joint were taken with the thumb in neutral rotation, pronation and supination, both with 0 degrees and with 30 degrees of flexion of the MCP joint...
September 2017: Journal of Hand Surgery Asian-Pacific Volume
https://www.readbyqxmd.com/read/28770510/the-posterior-bundle-of-the-elbow-medial-collateral-ligament-biomechanical-study-and-proposal-for-a-new-reconstruction-surgical-technique
#8
A Sard, E Dutto, R Rotini, S Vanni, S Pastorelli, B Battiston
BACKGROUND: The medial collateral ligament (MCL) is one of the primary elbows stabilizers. It is composed of an anterior bundle (AB), a posterior bundle (PB) and a transverse bundle. In elbow dislocations, until today MCL reconstruction has addressed the AB only. The purpose of this paper is to understand the biomechanical role of the PB of the MCL and to propose a new surgical technique for the simultaneous reconstruction of the anterior and posterior bundles, preventing the risk of recurrent posterior dislocation or posteromedial rotational instability (PMRI)...
August 2, 2017: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/28759830/forearm-nonunion-caused-by-hyperparathyroidism-with-7-years-follow-up-a-case-report
#9
Mayuko Kinoshita, Kiyohito Naito, Kentaro Aritomi, Yoichi Sugiyama, Nana Nagura, Kenji Goto, Yoshiyuki Iwase, Kazuo Kaneko
INTRODUCTION: We report a patient who developed nonunion of both bones of the forearm associated with hyperparathyroidism (HPT). PRESENTATION OF CASE: The patient was a 71-year-old female who previously fell and hit her left hand on the ground. At 2 years after injury the patient visited our hospital, since she became aware of instability of the left forearm without an inducer due to nonunion of the radioulnar diaphysis. The patient was surgically treated to acquire forearm support...
2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28759532/wrist-resistance-training-improves-motor-control-and-strength
#10
Edward Chu, You-Sin Kim, Genevieve Hill, Yoon Hyuk Kim, Chang Kook Kim, Jae Kun Shim
The aim of the present study was to investigate the effects of a 6-week direction specific resistance training program on isometric torque control and isokinetic torque strength of the wrist joint. Nineteen subjects were randomly assigned to either the wrist training group (n=9) or the control group (n=10). The training group performed wrist exercises in six directions (flexion, extension, pronation, supination, radial deviation, and ulnar deviation) while the control group did not. Data were collected on the isometric torque control, one-repetition maximum (1-RM) strength, and isokinetic maximum torque (angular velocity of 60°/s wrist movements) before and after six weeks of resistance training and at two-week intervals during training...
July 28, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28756509/glenohumeral-and-scapulohumeral-kinematic-analysis-of-patients-with-traumatic-anterior-instability-wearing-a-shoulder-brace-a-prospective-laboratory-study
#11
F Dellabiancia, I Parel, M V Filippi, G Porcellini, G Merolla
PURPOSE: To assess the effectiveness of a novel glenohumeral joint immobilizer, the S2 Shoulder Stabilizer(®), by evaluating shoulder kinematics with a stereophotogrammetry system. METHODS: Participants in this prospective laboratory study were recruited from patients with anterior traumatic instability awaiting arthroscopic glenohumeral stabilization. Glenohumeral and scapulohumeral kinematic data (arm abduction-adduction and internal-external rotation, and scapular pronation-retraction and mediolateral rotation) were collected twice, without and with the brace, using a VICON™ motion capture system, and processed with MATLAB(®) software...
July 29, 2017: Musculoskeletal Surgery
https://www.readbyqxmd.com/read/28754335/reliability-assessment-of-measuring-active-wrist-pronation-and-supination-range-of-motion-with-a-smartphone
#12
C Santos, N Pauchard, A Guilloteau
This study aimed to improve clinical examination techniques by determining the reliability of different methods to evaluate forearm movements. Two methods using the iPhone™ 5 and its gyroscope application (alone [I5] or attached to a selfie stick [ISS]) were compared with two conventional measurement devices (a plastic goniometer with a hand-held pencil [HHP] and a bubble goniometer [BG]) to evaluate the active range of movement (AROM) of the wrist during pronation and supination. Two independent groups of subjects took part in this prospective single-center diagnostic study: 20 healthy subjects and 20 patients...
July 25, 2017: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/28753234/manipulative-interventions-for-reducing-pulled-elbow-in-young-children
#13
REVIEW
Marjolein Krul, Johannes C van der Wouden, Emma J Kruithof, Lisette Wa van Suijlekom-Smit, Bart W Koes
BACKGROUND: Pulled elbow (nursemaid's elbow) is a common injury in young children. It often results from a sudden pull on the arm, usually by an adult or taller person, which pulls the radius through the annular ligament, resulting in subluxation (partial dislocation) of the radial head. It can also be caused by a fall or twist. The child experiences sudden acute pain and loss of function in the affected arm. Pulled elbow is usually treated by manual reduction of the subluxed radial head...
July 28, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28745437/vascularized-ulnar-periosteal-pedicled-flap-for-forearm-reconstruction-anatomical-study-and-a-case-report
#14
Barrera-Ochoa Sergi, Velez Roberto, Rodriguez-Baeza Alfonso, De Bergua-Domingo Josep Maria, Knörr Jorge, Soldado Francisco
PURPOSE: Through an anatomical review, the aim of this study is to define the ulnar periosteal branches of the posterior interosseous vessels (PIV). In addition, we report the clinical utility of a vascularized ulnar periosteal pedicled flap (VUPPF), supplied by the investigated PIV, in a complex case of radial nonunion. METHODS: Ten upper limbs latex colored from fresh human cadavers were used. Branches of the PIV were dissected under 2.5× loupe magnification, noting the periosteal, muscular, and cutaneous branches arising distal to the interosseous recurrent artery...
July 26, 2017: Microsurgery
https://www.readbyqxmd.com/read/28742605/predictors-of-the-biomechanical-effects-of-customized-foot-orthoses-in-adults-with-flat-arched-feet
#15
John B Arnold, Thomas May, Christopher Bishop
OBJECTIVE: To determine the potential presence and characteristics of biomechanical responders to customized foot orthoses during walking in adults with flat-arched feet. DESIGN: Experimental, repeated-measures. SETTING: University clinic and laboratory. PARTICIPANTS: Eighteen symptom-free adults with flat-arched feet. INTERVENTIONS: Customized foot orthoses. MAIN OUTCOME MEASURES: In-shoe foot biomechanics were measured during walking with and without customized foot orthoses using 3D analysis...
July 21, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28736099/selective-anterior-interosseous-nerve-conduction-study-coaxial-needle-versus-surface-electrode-recordings
#16
Paul Seror
OBJECTIVES: The aim is to determine which method provides the most selective motor nerve conduction of the anterior interosseous nerve (AIN), when the stimulation cannot be restricted to this nerve. METHODS: The AIN was stimulated at the elbow, along with the whole median nerve. The motor action potential (MAP) of the AIN was recorded with 2 different methods: 1 - a coaxial needle inserted in the pronator quadratus muscle (PQ); 2 - a pair of surface electrodes fixed on the PQ...
July 20, 2017: Neurophysiologie Clinique, Clinical Neurophysiology
https://www.readbyqxmd.com/read/28734536/evaluation-of-functional-outcome-after-nonsurgical-management-of-terrible-triad-injuries-of-the-elbow
#17
Farid Najd Mazhar, Davod Jafari, Alireza Mirzaei
BACKGROUND: Terrible triad (TT) is one of the severe injuries of the elbow that generally requires surgery. Nonsurgical treatment has recently been applied in selected cases of TT injury. Evaluation of the results of this treatment was the main aim of this study. METHODS: In a prospective cohort study, 10 patients with a mean follow-up of 30.6 months were evaluated. The inclusion criteria included a congruent joint after closed reduction, no indication for surgery of the coronoid and radial head fractures, no block in supination and pronation up to 60°, no intra-articular fragments, and a free and stable joint with ulnohumeral extension up to a minimum of 45°...
August 2017: Journal of Shoulder and Elbow Surgery
https://www.readbyqxmd.com/read/28725505/long-volar-plating-for-metadiaphyseal-fractures-of-distal-radius-study-comparing-minimally-invasive-plate-osteosynthesis-versus-conventional-approach
#18
Emilie Pire, Juan José Hidalgo Diaz, Santiago Salazar Botero, Sybille Facca, Philippe A Liverneaux
Background  Minimally invasive plate osteosynthesis (MIPO) has been used in wrist surgery for several years. The purpose of this retrospective study was to compare clinical and radiologic outcomes of MIPO technique with those of a conventional approach in the treatment of metadiaphyseal distal radius fracture by long volar plating. Materials and Methods  Our series consisted of 32 fractures in 31 patients, mean age 63.9 years, including 16 men and 15 women. MIPO technique was used in 15 wrists (group 1) and conventional approach (> 60 mm of skin incision) in 17 wrists (group 2)...
August 2017: Journal of Wrist Surgery
https://www.readbyqxmd.com/read/28719548/forearm-pronation-osteotomy-for-supination-contracture-secondary-to-obstetrical-brachial-plexus-palsy-a-retrospective-cohort-study
#19
Aharon Z Gladstein, Brant Sachleben, Emily S Ho, Alison Anthony, Howard M Clarke, Sevan Hopyan
BACKGROUND: Obstetrical brachial plexus palsy can lead to fixed forearm supination contracture. Fixed supination may lead to functional deficits as the affected hand cannot be positioned optimally for activities on a desk such as writing and typing, or for using tools including utensils, which require a neutral or pronated forearm. Forearm pronation osteotomy has been used to address this problem, although the functional benefit over nonoperative management has not been clearly defined...
July 17, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28718329/assessment-of-forearm-rotational-control-using-4-upper-extremity-immobilization-constructs
#20
Ayesha M Rahman, Nicole Montero-Lopez, Richard M Hinds, Michael Gottschalk, Eitan Melamed, John T Capo
BACKGROUND: Forearm immobilization techniques are commonly used to manage distal radius, scaphoid, and metacarpal fractures. The purpose of our study was to compare the degree of rotational immobilization provided by a sugar-tong splint (STS), short arm cast (SAC), Munster cast (MC), and long arm cast (LAC) at the level of the distal radioulnar joint (DRUJ), carpus, and metacarpals. METHODS: Seven cadaveric upper extremity specimens were mounted to a custom jig with the ulnohumeral joint fixated in 90° of flexion...
February 1, 2017: Hand: Official Journal of the American Association for Hand Surgery
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