Three degree of freedom,myoelectric control prostheses for upper arm

1)Myoelectricity can control actions of hand and wrist,a R or L 360°rotation of wrist and an extension or flexion of elbow.
2)If the myoelectricity can't be changed over,the passive switch changover can be added.
3)If necessary,a built-in battery can used.

Suitable for middle,short stumps of upper arm or shoulder joint disarticulation.