In arm and hand loss at the above-elbow level, both the elbow and the hand and wrist functions are affected; above-elbow arm prosthesis applications for this level are planned individually. In losses at this level, myoelectrically controlled prostheses, which work with signals taken from the remaining muscles, may be considered as an option. Prosthesis selection is always made in line with the specialist physician's assessment and medical report.
How Does a Myoelectric Prosthesis Work?
In myoelectric prostheses, the electrical signals generated when the intact muscles in the remaining upper arm region contract are detected by electrodes placed on the skin. These signals are transmitted to the electronic control system of the prosthesis and converted into movements of the elbow, wrist and hand unit.
While in mechanical prostheses movement is generally provided by shoulder and trunk movements, in myoelectric arm prostheses operated by muscle signals movement is directed through these signals. In this way, the aim is to imitate movements such as grasping and bending the elbow.
Fitting Process
Prosthetic fitting is a process planned according to the individual's needs and may include the following stages:
- Physician's examination and functional assessment
- Measuring muscle signals and determining suitability
- Custom-made socket and prosthesis planning
- Training and rehabilitation for using the prosthesis
Especially in the loss of the dominant side, such solutions may be considered to support activities of daily living.
Points to Consider
The structure of the residual limb, muscle condition, general health and the person's expectations for daily life play a role in determining the type of prosthesis; points to consider when choosing an above-elbow prosthesis are covered in detail. Appropriate device selection and the fitting process are carried out with the assessment of the relevant specialist team.
This content is for informational purposes; you should consult your physician for diagnosis and treatment.
