Abstract
People’s working capability is badly affected when they suffer an amputated arm. Artificial replacements with prosthetic devices to get a satisfactory level of performance for essential functions with the currently available prosthetic technology are very difficult. Myoelectric arm prostheses are becoming popular because they are operated by a natural contraction of intact muscles. Hence, SEMG based artificial arm was fabricated. The system consists of different electronic and mechanical assemblies for operation of hand utilizing microcontroller in order to have minimum signal loss during its processing. With the help of relay switching connected to low power DC motor, system is capable of opening and closing of grip according to individual wish.
Highlights
The SEMG is the recording of muscle electrical activity and is measured by electrodes a±xed to the surface of the skin, above the muscle of interest so that rich useful information can be obtained from the muscles
Surface electromyogram may be affected by various peripheral factors such as spacing, type and placement of electrodes on desired location
The SEMG is the recorded sequences of two principal bioelectric activities: (a) Propagation of motor nerve impulses and their transmission at the neuromuscular junctions of a motor unit, and (b) Propagation of muscle impulses by the sarcolemma and the T-tubular systems resulting in excitation and contraction coupling
Summary
The control strategy of muscles is no longer available. Development of a natural surface electromyogram (SEMG) based control strategy based on the natural muscular activities selected by the central nervous system is still required with low cost. The advances in sensors include the use of piezoelectric materials, special metal alloys, polymers and new motor applications while the advances in mechanisms include mechanical designs based on the anatomy of. This is an Open Access article published by World Scientic Publishing Company. The simplest version of articial limb looks like the human limb called as cosmetic prosthesis It is made up of latex or silicon but is not able to perform any activity. It is used to hide distorted image of an amputee Another type is body powered prosthesis in which control cables are operated through shoulder's movement. A SEMG detector signal from di®erent motor units is a composite of di®erent signals of individual muscle for further analysis for the development of prosthetic arm.[3,4,5,6,7,8,9,10]
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