Anatomy Forearm

Question 1

purpose of interosseus membrane between radius and ulna

Answer 1

• keeps radius and ulan a fixed distance apart
• provides pivot for rotation of forearm

Question 2

the ulna and radius are parallel to each other when the forarm is supinated/pronated.

Answer 2

supinated

Question 3

the radius crosses over the ulna and both bones pivot along the interosseous membrane during supination/pronation.

Answer 3

pronation

Question 4

during pronation what happens to the radius bone?

Answer 4

The head of the radius remains along the lateral side of the elbow, but the distal end of the radius crosses over medially

Question 5

Name the borders of the cubital fossa

Answer 5

1. Superior
   
   • imaginary line connecting epicondyles of humerus
2. Lateral
   
   • Brachioradialis
3. Medial
   
   • pronator teres