Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 35 for “"Myoelectric"”.
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Classification of finger gestures from myoelectric signals
Electromyographic signals may provide an important new class of user interface for consumer electronics. In order to make such interfaces effective, it will be crucial to map EMG signals to user gestures in real time. The mapping from signals to gestures will vary from user to user, so it must be …
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Simultaneous Multi-Joint Myoelectric Control of Transradial Prostheses
… coordinated manner. Commercially available myoelectric control algorithms are unintuitive, allow only a single degree of freedom to be operated at a time, and typically require some type of a mode switch to transition between operating the various functions of the system. Pattern …
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An intelligent prosthetic hand using hybrid actuation and myoelectric control
… Alloy (SMA) actuation and controlled by only two myoelectric sensors. A prosthesis as a tool makes no pretence of trying to replace the lost limb physiologically but it works as an aid to help provide some of the lost functions and is an interchangeable device worn and used as needed. Much …
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Surface myoelectric signal analysis and enhancement for improved prosthesis control
… techniques are presented in the field of myoelectric control. Specifically, algorithms for activity detection, noise identification and noise reduction are introduced, evaluated and discussed. The ultimate aim has been to develop algorithms to improve the performance of prosthetic control …
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POWER SPECTRAL ANALYSIS OF SURFACE MYOELECTRIC SIGNALS DURING DYNAMIC CONTRACTIONS
The stochastic nature of surface myoelectric signals (MES) requires the use of power spectral analysis for effective characterisation. Spectral changes during different types of muscular activity are monitored using spectral parameters like mean power frequency, ratios of powers in several …
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Development of a Myoelectric Detection Circuit Platform for Computer Interface Applications
… inputs. One of these novel sensor systems is the myoelectric detection circuit, which can measure electromyographic (EMG) signals produced by contracting muscles through specialized electrodes, and convert the signals into a usable form through an analog circuit. With the goal of making a …
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Three velocity modulated myoelectric A/K prosthesis controllers ; initial subject evaluation
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1982.
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Finger force capability: measurement and prediction using anthropometric and myoelectric measures
Hand and finger force data are used in many settings, including industrial design and indicating progress during rehabilitation. The application of appropriate work design principles, during the design of tools and workstations that involve the use of the hand and fingers, may minimize upper …
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Frequency Interception and Manipulation Vulnerabilities in Myoelectric-Computer Interface Signal Transmission
Neural interface systems such as myoelectric-computer interfaces (MCIs) and brain-computer interfaces (BCIs) assist patients with motor impairments due to injury or neurodegenerative conditions. Neural interface research has focused on device accuracy and usability while neglecting to …
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Development of a low-cost high-impact resistant compliant myoelectric prosthetic hand
… sensory substitution, when compared to standard myoelectric prostheses that lack these features, improves grasping of delicate objects like an eggshell and a cup of water both with and without visual feedback. Our hand is easily integrated into standard sockets, facilitating long-term testing of …
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Effects of training methods on classification on surface electromyographic signals for myoelectric control
Myoelectric devices, devices which use the electric signals from human muscles as a control scheme, have shown promise in their potential to aid in human movement augmentation and assistance for those that have suffered injury. Previous studies involving myoelectric devices and the classification …
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The Effects of Progressive Relaxation and Myoelectric Feedback on Respiratory Resistance in Bronchial Asthmatics
<p>For the individual with bronchial asthma, an asthmatic attack can be a life threatening experience. A theory of bronchial asthma as a conditioned response has been recently proposed by several investigators. It was suggested that this conditioned response may be modified by lowering the arousal …
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The effect of socket design on the reliability of EMG signal transduction in trans-radial myoelectric prostheses
Background: The majority of trans-radial myoelectric prosthesis users experience some level of difficulty and disruption in the control of their prosthesis everyday (1). Previous studies by Head (1) and Chadwell et al. (2) have suggested that the fit and/or design of the socket could be a …
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Relationships between lumbar inter-vertebral kinematics and paraspinal myoelectric activity during sagittal flexion: a quantitative fluoroscopy and surface electromyography study
… understanding of normal lumbar kinematic and myoelectric behaviour, will assist in the interpretation of what is abnormal in terms of inter-vertebral spinal mechanics. Methods. Contemporaneous lumbar sEMG and QF motion sequences were recorded during controlled active flexion of 60° in 20 males …
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EMG as a control parameter in lower limb prosthetics : surface vs. implanted electrodes
… system and capitalise upon its enormous ability. Myoelectric sensors are one method of achieving that by providing the prosthesis with information about the amputees’ intentions through voluntary and involuntary control. The feasibility of using myoelectric signals, recorded with surface and …
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The reality of myoelectric prostheses : how do EMG skill, unpredictability of prosthesis response, and delays impact on user functionality and everyday prosthesis use?
Myoelectric prostheses are designed to provide cosmesis and a degree of upper limb functionality for people with upper limb absence. However, self-reported rejection rates remain stubbornly high, with control of the prosthesis being commonly cited as one of the primary reasons. This observation may …
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EMG control of prosthetic ankle plantar flexion
… paper presents a hybrid controller that adds myoelectric control functionality to an existing intrinsic controller. The system employs input from both mechanical sensors on the ankle as well as myoelectric signals from gastrocnemius muscle of the user. This control scheme lets the user to …
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Novel Methods for Recording and Analysing High-Density EMG Signals of the Hand & Forearm
… in the human body. These potentials, called myoelectric activity, can be registered and analysed using non-invasive recording electrodes in a technique known as surface electromyography (sEMG). Key information about the muscles can then be extracted from EMG signals using signal processing …
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Mechanisms for enabling closed-loop upper limb sensorimotor prosthetic control
Myoelectric upper limb prostheses are limited in their ability to provide sensory feedback to a user. The lack of sensory feedback forces prosthesis users to rely on visual feedback alone in manipulating objects, and often leads to abandonment of the prosthesis in favor of the user's unimpaired …
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