Assertion: ulna's notch | /r/CapableOf | articulate with proximal end of the radius
Facets:
Source sentences:
text: Lateral to the trochlear notch, at the end of the coronoid process, there is a small smooth surface called the radial notch that articulates with the proximal end of the radius to form the proximal radio-ulnar joint, so the radius can rotate around the ulna to maintain the flexibility of the elbow .