Wrist Driven And Ratchet Wrist Hand Orthoses - Rationale, Components, And Orthometry

Question 1

A quadriplegic often has weak shoulder and elbow musculature, leading to difficulties in performing activities of daily living. What level of elbow flexion strength is needed to bring the hand to the mouth for feeding?

Answer 1

3+

Question 2

The thumb opposition bar acts to both keep the thumb from falling out into extension and provide an attachment point for the thumb post. The proper location of the thumb opposition bar is:

Answer 2

Dorsal thumb MCP joint and shaft

Question 3

The actuator bar of a wrist driven wrist hand orthosis connects the orthotic wrist joint to the orthotic metacarpal phalanges joint. It is designed to:

Answer 3

Transfer the patients wrist motion to finger motion

Question 4

The ratchet wrist hand orthosis assists quadriplegics in achieving prehension to perform some tasks. What spinal cord injury level is appropriate for consideration of a ratchet versus a wrist driven WHO?

Answer 4

C5

Question 5

According to the lecture, what is one of the factors that drives the patients successful use of a complex, dynamic wrist hand orthosis?

Answer 5

Patient motivation for independence