Controlled upper limb prosthetic function and type of myoelectric prosthesis
The US delsys surface electromyography system controls the definition of upper limb prosthesis: the myoelectric upper limb prosthesis uses the bioelectricity generated by the residual limb as a signal input into the prosthesis, and is controlled by the electronic system to control the movement of the prosthetic hand. This prosthesis is called the myoelectric control upper limb prosthesis. .
The delsys myoelectric controlled upper limb prosthesis has a rapid development and can adapt to the myoelectric control upper limb prosthetic system that can be installed by amputees from various parts of the wrist to the shoulder.
The delsys myoelectric prosthesis can be divided into the following four types according to its activity:
[1. Single-degree-of-freedom myoelectric control of upper limb prosthesis]
Its finger thumb and other four fingers open and close, the wrist can be passively rotated, and it can be self-locking at any position. It will not be loosened by external force. It can grab large, small, light and heavy objects and be fragile or strong. The object is suitable for the installation of the forearm and wrist off the amputee.
[two, degrees of freedom myoelectric control upper limb prosthesis]
It is divided into two types, one is the upper arm two degrees of freedom, the fingers can be stretched, closed, elbow bendable, stretch 135 degrees, the wrist can be passively rotated, can grab large, small, light, heavy objects and fragile or strong The object is suitable for the upper arm or elbow joint amputee. The other is the two degrees of freedom of the forearm, the fingers can be opened and closed, the wrist can be rotated inside and out of the 360 ​​degrees (or flexion), suitable for amputee with proper length of the forearm residual limb.
[three, degrees of freedom myoelectric control upper limb prosthesis]
The fingers can be opened and closed, the wrist can be rotated 360 degrees (or flexed), and the elbow can flex and extend 135 degrees. It can grasp large, small, light and heavy objects as well as fragile or strong objects. It is suitable for the upper arm. Upper or one-sided full-arm amputation is installed.
[four, degrees of freedom myoelectric control upper limb prosthesis]
It is made up of the above three degrees of self-equalization plus the full arm lift, put down this self-degree, suitable for the installation of two-arm amputee.
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