| Radial notch | |
|---|---|
 Upper extremity of left ulna. Lateral aspect. (Radial notch visible at center top.) | |
| Details | |
| Identifiers | |
| Latin | incisura radialis ulnae |
| TA98 | A02.4.06.005 |
| TA2 | 1234 |
| FMA | 23618 |
| Anatomical terms of bone | |
The radial notch of the ulna (lesser sigmoid cavity) is a narrow, oblong, articular depression on the lateral side of the coronoid process; it receives the circumferential articular surface of the head of the radius.
It is concave from before backward, and its prominent extremities serve for the attachment of the annular ligament.