Myoelectric Limbs

Besame Mucho - Fernando Varela

Myoelectric Arm for below Elbow Prosthesis - CSIR - CSIO Technology

Myoelectric Arm  for below Elbow Prosthesis

Recently I visited CSIR technofest 2010 showcased by Council of Scientific & Industrial Research, New Delhi, at India International Trade Fair in New Delhi, the Capital of India.  In this technofest, I have seen a technology  " Myoelectric Arm  for below Elbow Prosthesis" which was developed by CSIO (Central Scientific Instruments Organisation, Chandigarh) under the aegis of CSIR, New Delhi, India.

Now-a-days, with increase in accidents and machine calamities (in factories), people have below elbow amputations and they need some kind of prosthesis like Myoelectric Arm  for below Elbow Prosthesis.  Low cost prosthesis is not able to perform effective movements.  Central Scientific Instruments Organisation, Chandigarh has developed much low cost prosthesis called ‘Myoelectric Arm  for below Elbow Prosthesis' for the requirements of needy people.

Myoelectric arm is an artificial arm meant to provide rehabilitation to arm amputees at affordable cost. It looks and works like a natural arm.

When a person performs the action of opening or closing his hand, the muscles of his arm (residual stump for amputee) generate an electric potential.  The muscles generating maximum signal are identified and a set of electrodes pick up this signal.  After electronic processing, a motor is driven to close or open the hand.

The arm consists of two parts – mechanical assembly and electronic circuitry.  Mechanical parts comprise of grouping fingers, palm, wrist and lower portion of upper limb.  Electronics involves sensor electrodes, circuitry to process the myoelectric signal and a DC motor for opening and closing the hand.  A body colored glove provides the cosmetic appeal to the entire set up.

This prosthesis weight is 1.2 to 1.7 Kg (maximum), Operating voltage is 7.2 V.

Features of this myoelectric arm below elbow prosthesis

• Microcontroller based operation
• Intelligent Prosthesis with variable hand speed setting according to user's performance
• Variable grip force on the object depending on its weight.

This is a boon to the needy people who are in armed forces, civilians and local industries.

The below links are useful for more details and information

http://www.csio.res.in

http://www.csir.res.in

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MYOELECTRIC UPPER LIMB PROSTHESES FOR HIGH-LEVEL AMPUTATIONS: Design Methodology, Prototype, and Test of an Artificial Arm for Shoulder-Disarticulated Patients Sale Price: $61.00   Eligible for free shipping! Availability: Usually ships in 24 hours See Reviews For This Product Description The prosthetic rehabilitation of upper limb amputees presenting a high-level amputation is a very challenging target due to the severe disability of the patients and to the current lack of commercial prosthetic solutions adequate to significantly restore a sufficient quality of life. Two contrasting aspects are extremely important to satisfy the patients? requirements, i.e. the Functionality and the Wearability of the prosthesis. This book presents the activity that was performed for the development of a novel powered shoulder articulation and its introduction in a current myoelectric prosthesis. The approach followed for the design process has been formalized in a procedure that makes it possible to tackle the problem of prosthetic rehabilitation from a general perspective, consistently combining clinical aspects and technical issues. The application of the procedure determined the design guidelines of the new device, which was finally designed, prototyped and tested. The book is mainly addressed to the community working in the specific field of Upper Limb Prosthetics and/or the field of Upper Limb Robotic Rehabilitation, since many key issues are common to both the disciplines.

Powered Upper Limb Prostheses: Control, Implementation and Clinical Application Sale Price: $313.45 See Reviews For This Product Description Powered Upper Limb Prostheses deals with the concept, implementation and clinical application of utilizing inherent electrical signals within normally innervated residual muscles under voluntary control of an upper limb amputee, amplifying these signals by battery-powered electrical means to make a terminal device, the prosthetic hand, move to perform intended function. The reader is introduced to various facets of upper limb amputations and their clinical management in both children and adults. The authors from Canada, USA and Great Britain are well known practicioners, academics and researchers in the field. The book has over 130 illustrations and contains an extensive bibliography.