Bones of the forearm

Question 1

What are the two bones of the forearm and what are they held together by?

Answer 1

The Ulna and Radius. These are held by the interosseous membrane.

Question 2

Answer the following:

• Do the bones participate at the elbow joint?
• Where does the Radius participate distally and what is the joint name?
• Does the ulnar participate with the wrist?
• What is the name of the joint where the radius and ulna participate?

Answer 2

• Both bones particupate at the elbow joint.
• It particupates distally at the wrist and is called the radiocarpal joint
• The ulna doesnt participate at the wrist
• The joint is the radioulnar joints

Question 3

What movement does the ulna have on the radius?

Answer 3

It pivots upon the ulna

Question 4

Where does the proximal head articulate with?

Answer 4

With the distal humerus and head of radius

Question 5

What does the radius do upon the ulna?

Answer 5

It pivots to create pronation and supination

Question 6

Where are the heads of the ulna and radius

Answer 6

The ulna’s head is distal and the radius is proximal.

Question 7

What are the two parts that are considered to be the elbow joint?

Answer 7

The humeroulnar and humeradial joint.

The humerulnar - trochlea of the humerus articulates with the trochlear notch of the ulna

The humeroradial joint - the capitulum of the humerus articulates with the head of the radius

Question 8

Elbow Joint - ligaments, describe.

Answer 8

On the lateral side is the radial collateral ligament which is