Forearm Anatomy: Pronation vs Supination - Bone Alignment Diagram #3317901 (License: Personal Use)

This vintage-style anatomical drawing illustrates the human forearm in two functional positions: supination (B), where the radius and ulna run parallel, and pronation (A), where the radius crosses obliquely over the ulna. Key bones-humerus (H), radius (R), and ulna (U)-are labeled to clarify joint mechanics at the elbow and wrist. The hand orientation reflects rotational changes critical for daily motor function.

Used in anatomy textbooks, orthopedic education, physical therapy resources, and kinesiology courses to demonstrate forearm rotation mechanics; targets learners seeking visual reinforcement of skeletal movement principles.