Transradial Biomechanics

Question 1

The coal for capturing the long transradial patietn’s ability to generate pronation and supination is:

Answer 1

50% of the motion evaluated without the socket in place

Question 2

Motions at the elbow, forearm, and wrist are important for prepositioning the terminal device. For a partial hand amputation, wrist motion may be critical.

Answer 2

True

Question 3

Rotational stability of the prosthetic socket can be provided one of three ways:

Answer 3

• the contours of the residual limb may be captured inside the socket.
• rigid joints may be applied to the exterior of the prosthetic socket. These cross the elbow joint, preventing axial rotation.
• socket trim lines may encompass the epicondyles; this intimate fit about the epicondyles prevents axial rotation.

Question 4

In the figure of eight transradial harness, the posterior aspect of the axilla loop is found connected to the Northwestern ring, which is located slightly to the sound side on the patients back and centered

Answer 4

Just below C7

Question 5

Conventional or body powered terminal device operation is generated by pulling on the control cable (i.e., excursion) The transradial amputee generates excursion through the motions of humeral flexion and extension, elbow flexion and extension, and:

Answer 5

Bi-scapular abduction