PROPORTIONAL MYOELECTRIC CONTROL Meaning and
Definition
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Proportional myoelectric control refers to a method used in the design and operation of prosthetic devices that allows for the control of movements based on the electrical signals generated by the muscles of the residual limb. It involves the use of surface electromyography (EMG) sensors placed on the skin surface to detect and measure the electrical activity produced during muscular contraction.
In this type of control, the amplitude of the EMG signals is directly proportional to the extent and intensity of muscle contraction, which enables a more accurate and intuitive control of the prosthetic limb. The myoelectric signals are amplified, filtered, and processed by a complex algorithm or a microprocessor, which then translates them into specific movements of the prosthetic limb, such as opening or closing the hand or bending or extending the elbow.
The proportional myoelectric control system offers several advantages over other control methods, particularly in terms of the smoothness and precision of movements. It allows for a more natural and fluid control, since the degree of muscle contraction determines the speed and force applied to the prosthetic limb. This can greatly improve the user's ability to perform a variety of daily tasks, as they can modulate their muscle contraction to achieve the desired level of movement.
Overall, proportional myoelectric control represents a significant advancement in prosthetic technology, offering individuals with limb loss more refined and intuitive control over their prosthetic devices, thus enhancing their independence and quality of life.
