Artificial Limbs for Upper Extremity

No Prosthesis

Not every person with an upper extremity amputation is a candidate for a prosthesis. Physical capabilities and limitations can be a factor, as can an individual’s development of techniques to adapt to daily tasks without the use of a prosthesis. Also, earlier unsuccessful fittings, which failed to work adequately or were painful, can contribute to an individual’s decision not to use a prosthesis.

Some upper extremity amputees who have chosen not to wear prostheses in the past have found that the advanced fitting techniques and componentry now available through an experienced Prosthetist can enhance their lives. At I.A.S we use or resources and experience to provide our clients with a wide range of prosthetic devices and up to date technology. Contact us to discuss your options.

Electrically-Powered Prostheses

Electrically powered prostheses use small electric motors to move the prosthetic components. These motors can be found in the terminal device (hand or hook), wrist, and elbow. An electrically powered prosthesis utilizes a rechargeable battery system to power the motors. Because electric motors are used to operate hand function, grip force of the hand is significantly increased, often in excess of 20-32 pounds.

There are several ways to control this type of prosthesis (CONTROL SCHEMES):

1. Myoelectric Control
2. Servo Control
3. Push Button Control
4. Harness switch Control

In most cases a single control scheme is chosen. For the more advanced/ higher-level fittings, several control schemes may be used on the same prosthesis to provide enhanced function.

MYOELECTRIC CONTROL utilizes small electrodes resting on the surface of the skin to detect and then have amplified tiny electrical signals emanating from voluntarily controlled muscles, typically in the residual limb. These signals act as ‘switches’ to control specific functions and activities of electric motors associated with the prosthetic terminal devices, wrists, and elbows.