The term 'Radius Neighbors' refers to the two bones in the forearm, the radius and the ulna. The ulna is the longer of the two bones and is often referred to as the 'funny bone'. It is located on the medial side of the forearm and is the larger of the two bones. The radius is located on the lateral side of the forearm and is the shorter of the two bones. Together, these two bones form the elbow joint and are essential for movement of the arm.