Question

What is the origin and insertion of the extensor carpi radialis longus muscle?

1) Origin: lateral supracondylar ridge of humerus, Insertion: base of metacarpal II
2) Origin: medial supracondylar ridge of humerus, Insertion: base of metacarpal II
3) Origin: lateral supracondylar ridge of humerus, Insertion: base of metacarpal III
4) Origin: medial supracondylar ridge of humerus, Insertion: base of metacarpal III

Answer 1

The origin of the extensor carpi radialis longus muscle is the lateral supracondylar ridge of the humerus, and it inserts at the base of metacarpal II.

Step-by-step explanation:

The origin of the extensor carpi radialis longus muscle is the lateral supracondylar ridge of the humerus, and it inserts at the base of metacarpal II. Therefore, the correct option is 1) Origin: lateral supracondylar ridge of humerus, Insertion: base of metacarpal II.