Electrogoniometer for the Measurement of Human Elbow Joint Rotation

Since the electrogoniometric method has been justified for the measurement of lower extremity joint motion, a similar device is developed for the measurement of elbow joint and forearm rotations. In this design, the axis of forearm rotation coincides with the anatomical axis which eliminates the cross talk existing in the regular triaxial goniometer. Although the axis of abduction-adduction is still offset from the elbow joint, special linkage arrangement was used to obtain equivalent motion. Experimental method was used to validate the accuracy of the device and model simulation was performed to emphasize the importance of accurate placement of the instrument on test subjects. Application of the present apparatus to normal subjects was studied to illustrate the range of elbow motion required in performing normal activities of daily living. This device is currently used in the functional evaluation of patients with elbow and forearm problems.

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An Interface between an Exoskeletal Elbow Motion Assistance Robot and the Human Upper Arm

Journal of Robotics and Mechatronics ◽

10.20965/jrm.2002.p0439 ◽

2002 ◽

Vol 14 (5) ◽

pp. 439-452 ◽

Cited By ~ 5

Author(s):

Kazuo Kiguchi ◽

◽

Shingo Kariya ◽

Takakazu Bnaka ◽

Keigo Watanabe ◽

...

Keyword(s):

Surface Electromyography ◽

Elbow Joint ◽

Human Subject ◽

Angular Position ◽

Skin Surface ◽

Human Motion ◽

Daily Activities ◽

Joint Motion ◽

Upper Arm ◽

Elbow Motion

We have been developing exoskeletal motion assistance robots for human motion support to help physically weak persons. Since elbow motion is one of the simplest and most important motion in daily activities, we have developed a exoskeletal robot for human elbow motion assistance. In this system, the angular position and impedance of the exoskeletal robot are controlled by multiple fuzzy-neuro controllers. Skin surface electromyography (EMG) signals and wrist force by the human subject during elbow joint motion have been used as input information for the controller. Since the activation of working muscles tends to vary with the human subject's upper arm posture, we propose an interface that cancels out the effect of posture changes of the human subject's upper arm. Experimental results show the effectiveness of the proposed interface.

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Shoulder Joint Motion Analysis of Daily Living Activities Using a Global Coordinate System

The Japanese Journal of Rehabilitation Medicine ◽

10.2490/jjrmc.50.840 ◽

2013 ◽

Vol 50 (10) ◽

pp. 840-844

Author(s):

Yukiya INOUE ◽

Mayumi KIHARA ◽

Junko YOSHIMURA ◽

Naoki YOSHIDA ◽

Kenji MATSUMOTO ◽

...

Keyword(s):

Coordinate System ◽

Motion Analysis ◽

Shoulder Joint ◽

Daily Living ◽

Global Coordinate System ◽

Joint Motion ◽

Daily Living Activities

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The evaluation of elbow joint motion using bio-impedance signal

2017 14th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON) ◽

10.1109/ecticon.2017.8096223 ◽

2017 ◽

Author(s):

Liu RenHe ◽

Booncharoen Wongkittisuksa

Keyword(s):

Elbow Joint ◽

Joint Motion

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Tumoral Calcinosis: Case Report and Review

Journal of Health and Allied Sciences NU ◽

10.1055/s-0040-1714198 ◽

2020 ◽

Vol 10 (02) ◽

pp. 90-96

Author(s):

Piyush Vaghasiya ◽

Lathika Shetty ◽

Molahalli Shantharam Shetty ◽

Muthur Ajith Kumar

Keyword(s):

Case Report ◽

Calcium Phosphate ◽

Elbow Joint ◽

Daily Living ◽

Clinical Presentation ◽

Tumoral Calcinosis ◽

Radiological Imaging ◽

Left Elbow ◽

Calcium Deposits ◽

Reduced Mobility

AbstractTumoral calcinosis (TC) is an uncommon disorder characterized by the deposition of calcium phosphate in periarticular tissues. TC has been a controversial clinico-pathological entity first described in 1943. The calcium deposits are usually present in the large joints such as the hips and shoulders. Patients often present with localized swelling and reduced mobility around the involved joints which interfere with activities of daily living. A 12-year-old boy presented at our clinic with a painful swelling around his left elbow joint with 6-month duration over which the swellings progressively increased. Radiological imaging identified a soft tissue calcified mass present around both elbow joints. Excision and biopsy of the left elbow demonstrated a tumor consisting of myxoid material with multiple areas of calcification with a well-defined capsule. Microscopy confirmed typical features of TC. We present our case report due to unusual clinical presentation noted in this case.

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An overview and categorization of dynamic arm supports for people with decreased arm function

Prosthetics and Orthotics International ◽

10.1177/0309364613498538 ◽

2013 ◽

Vol 38 (4) ◽

pp. 287-302 ◽

Cited By ~ 31

Author(s):

Loek A Van der Heide ◽

Bob van Ninhuijs ◽

Arjen Bergsma ◽

Gert Jan Gelderblom ◽

Dick J van der Pijl ◽

...

Keyword(s):

Systematic Review ◽

Electrical Stimulation ◽

Daily Living ◽

Scientific Literature ◽

Product Information ◽

Low Complexity ◽

Assistive Devices ◽

Joint Motion ◽

Tremor Suppression ◽

Arm Function

Background:Assistive devices that augment arm function were already introduced during the polio era. Devices are still being developed, but a review has not been performed thus far.Objective:To create an overview and categorize assistive devices facilitating arm function in activities of daily living for people with decreased arm function.Study design:Literature review.Methods:A systematic review in three scientific literature databases. Conference proceedings, assistive technology databases, and references were searched and experts consulted. This resulted in a database of dynamic arm supports. Product information was added, and the devices were categorized.Results:A total of 104 dynamic arm supports were found. These could be categorized as nonactuated devices (N = 39), passively actuated devices (N = 24), actively actuated devices (N = 34), or devices using the functional electrical stimulation principle (N = 7). Functionality analysis resulted in second-level categorization: tremor suppression, facilitation of anti-gravity movement, and assistance of specific joint motion.Conclusion:All devices could be ordered in a categorization of low complexity. Many have been developed; most have disappeared and have been succeeded by similar devices. Limitations of the devices found mainly concern interfacing and the range of motion facilitated. Future devices could make use of whatever residual strength is available in the users’ arm for control.Clinical relevanceThe provided overview of devices in this article and the classification developed is relevant for practitioners seeking assistive solutions for their clients as it makes the range of developed solutions both accessible and comprehensible.

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Control System for an Elbow Joint Motion Simulator

Volume 9: Mechanical Systems and Control, Parts A, B, and C ◽

10.1115/imece2007-42806 ◽

2007 ◽

Author(s):

Patrick J. Schimoler ◽

Jeffrey S. Vipperman ◽

Laurel Kuxhaus ◽

Angela M. Flamm ◽

Daniel D. Budny ◽

...

Keyword(s):

Control System ◽

Elbow Joint ◽

Degrees Of Freedom ◽

Biceps Brachii ◽

Control Algorithms ◽

Joint Motion ◽

Motion Simulator ◽

Co Activation ◽

Flexion Extension ◽

The Many

The many muscles crossing the elbow joint allow for its motions to be created from different combinations of muscular activations. Muscles are strictly contractile elements and the joints they surround rely on varying loads from opposing antagonists for stability and movement. In designing a control system to actuate an elbow in a realistic manner, unidirectional, tendon-like actuation and muscle co-activation must be considered in order to successfully control the elbow’s two degrees of freedom. Also important is the multifunctionality of certain muscles, such as the biceps brachii, which create moments impacting both degrees of freedom: flexion / extension and pronation / supination. This paper seeks to develop and implement control algorithms on an elbow joint motion simulator that actuates cadaveric elbow specimens via four major muscles that cross the elbow joint. The algorithms were validated using an anatomically-realistic mechanical elbow. Clinically-meaningful results, such as the evaluation of radial head implants, can only be obtained under repeatable, realistic conditions; therefore, physiologic motions must be created by the application of appropriate loads. This is achieved by including load control on the muscles’ actuators as well as displacement control on both flexion / extension and supination / pronation.

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Accuracy and Precision of a Control System for an Elbow Joint Simulator

ASME 2008 Summer Bioengineering Conference, Parts A and B ◽

10.1115/sbc2008-192826 ◽

2008 ◽

Author(s):

Patrick J. Schimoler ◽

Jeffrey S. Vipperman ◽

Laurel Kuxhaus ◽

Daniel D. Budny ◽

Angela M. Flamm ◽

...

Keyword(s):

Control System ◽

Soft Tissue ◽

Radial Head ◽

Elbow Joint ◽

Joint Motion ◽

Joint Mechanics ◽

Scientific Investigations ◽

Accuracy And Precision ◽

Control Schemes ◽

Joint Implants

Joint motion simulators (JMS’s) have been developed for many applications enabling the repeatable testing of prostheses, scientific investigations of joint mechanics and the study of surgical procedures.[1–4] Although Morrey has reported that radial head implants have lower post-operative satisfaction than other joint implants[5] and Dunning has examined several issues with radial heads, many problems remain.[6] It is therefore beneficial to develop a simulator capable of evaluating radial head implants. A robust simulator can also provide the ability to test soft tissue strains at the elbow and compare control schemes that may elucidate the body’s means of controlling multiaxial multimuscle systems.

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Biomechanics of axial load transmission across the native human elbow

Shoulder & Elbow ◽

10.1177/1758573220961025 ◽

2020 ◽

pp. 175857322096102

Author(s):

Kaleb Smithson ◽

Jacob Smith ◽

William Hogue ◽

Erin Mannen ◽

Shahryar Ahmadi

Keyword(s):

Elbow Joint ◽

Elbow Flexion ◽

Upper Extremities ◽

Forearm Rotation ◽

Contact Areas ◽

Load Transmission ◽

Pressure Mapping ◽

Average Maximum ◽

Significant Difference ◽

Fresh Frozen

Background Elbow and forearm motion are thought to affect elbow load transmission, yet little empirical evidence exists to quantify the biomechanics. Methods Eight fresh-frozen human cadaver upper extremities were utilized. A 100 N axial force was applied across the elbow joint at elbow flexion angles of (0°, 30°, 60°, and 90°) and forearm rotation angles (0°, 45° supination, and 45° pronation). Pressure mapping sensors were placed in both the radiocapitellar and ulnotrochlear joints. Force distributions and contact areas were measured, and paired t-tests were used for comparison (p < 0.05). Results The average maximum loading percentage of the radiocapitellar and ulnotrochlear joint pressures were 57.8 ± 4.6% and 42.2 ± 4.6%, respectively. Elbow flexion angle and forearm rotation did not significantly affect the joint loading. There was no significant difference between the contact areas of each joint, although ulnotrochlear and radiocapitellar joints demonstrated an inverse relationship. Conclusion Our study is the only one to date to comprehensively evaluate loading mechanics throughout both functional elbow flexion and forearm rotation across both articulations. The load sharing ratio across the radiocapitellar and ulnotrochlear joints was 58%:42%, agreeing with previously reported ratios with limited parameters. A relationship may be present between increasing radiocapitellar and decreasing ulnotrochlear contact areas as elbow flexion increases.

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