Question

Where does the Extensor Carpi radialis longus originate and insert? And what is its action?

Answer 1

The Extensor Carpi radialis longus muscle originates from the lateral supracondylar ridge of the humerus and inserts onto the base of the second metacarpal bone of the hand. Its action is to extend the hand at the wrist joint and abduct the hand.

Step-by-step explanation:

The Extensor Carpi radialis longus muscle originates from the lateral supracondylar ridge of the humerus. It inserts onto the base of the second metacarpal bone of the hand.

The action of the Extensor Carpi radialis longus muscle is to extend the hand at the wrist joint and abduct the hand, moving it away from the midline of the body.