Question

When the bones of the forearm are supinated (palm of the hand faces anteriorly), the radius is crossing over the ulna. True or false.

Answer 1

It's false that when the bones of the forearm are supinated (palm of the hand faces anteriorly), the radius is crossing over the ulna.

Bones of forearm :

Your forearm is made up of two bones, the radius and ulna. Most adult forearm fractures involve both shattered bones. In the middle of the forearm, at the upper (proximal) end closest to the elbow, or at the farthest (distal) end closest to the wrist, forearm fractures are possible.

Why are there 2 bones in the forearm?

Functionally, the humerus and carpal bones, which are articulated with the radius and ulna as previously mentioned, serve as the main support structure of the forearm. Both bones act as the origin and insertion points for the muscles that bend and extend the fingers, wrist, and forearm.

Humerus bones :

The largest bone in the upper extremity and the one that defines the human brachium is the humerus (arm). At the elbow joint, it articulates distally with the radius and ulna and proximally with the glenoid via the glenohumeral (GH) joint.

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