What are the origin, insertion, and primary action of the flexor carpi radialis?

• A. Origin: medial epicondyle of the humerus; Insertion: pisiform; Action: flexes wrist.
• B. Origin: medial epicondyle of the humerus; Insertion: bases of the 2nd and 3rd metacarpals; Action: flexes and abducts the wrist.
• C. Origin: olecranon; Insertion: base of the 5th metacarpal; Action: flexes wrist.
• D. Origin: lateral epicondyle of the humerus; Insertion: base of the 2nd metacarpal; Action: extends wrist.

Answer: (B)