Wrist/Hand Textbook

Question 1

Even though it’s the radius primarily moving, the ulna moves ___ during pronation and ___ during supination.

Answer 1

posteriorly & laterally during pronation

anteriorly & medially during supination

Question 2

The radiocarpal joint includes what articulations?

Answer 2

radius, scaphoid, and lunate

the TFCC is found between the ulna and the lunate & triquetrum

Question 3

With the TFCC disc in place, the radius bears _% of the load and the ulna bears _%

Without the TFCC, the radius would bear _% and the ulna, _%

Answer 3

60% radius
40% ulna

without the TFCC, 95% of axial load to radius and 5% to the ulna

Question 4

The TFCC can be damaged by forced ___ & ___

Answer 4

forced extension & pronation

Question 5

Joint articulations: the distal radius is __ and the proximal row of carpals is ___

Answer 5

concave, convex

Question 6

The scaphoid, lunate, and triquetrum articulate with the ___ & ___ to form a compound saddle joint.

Answer 6

capitate and hamate

Question 7

The trapezoid & trapezium together articulate with the __ to form a compound saddle joint

Answer 7

scaphoid

Question 8

The 1st CMC joint is a __ joint, the remaining 2-5 are ___ joints.

Answer 8

saddle

planar