Lesson
Forearm Joint Muscles-Actions
| Action (Plane of Motion) | Supination (Transverse) | Pronation (Transverse) |
| Description of Motion | -The radius and ulna lie parallel to one-another, as in the anatomical position -The distal radius returns to a position lateral to the ulna | -The lower end of the radius is moved around the ulna -The proximal end of the radius remains lateral to the ulna, while the lower end crosses to the medial side during pronation -The hand is carried along with this motion |