Question

Because it is located between the extensors and flexors of the forearm, the brachioradialis muscle is a good anatomical landmark. Which of the following statements is true regarding the brachioradialis?

a. The extensor digitorum muscle is anterior to brachiradialis
b. The palmaris tongus muscle in posterior to the brachloradinin
c. The brachioradialis muncle inserts on the flexor rotinaculum
d. The brachioradialis muscle is located between the fexor carpi ulnaris and the extensor carpi ulnaris muscles
e. The flexor carpi radialis muscle is medial to the brachioradialis, and extensor carpi radialis longus in posterior to the brachioradialis

Answer 1

The true statement regarding the brachioradialis muscle is that it is located between the flexor carpi ulnaris and the extensor carpi ulnaris muscles, making option (d) the correct answer.

Step-by-step explanation:

Among the given options regarding the position of the brachioradialis muscle in relation to other muscles of the forearm, the correct statement is that the brachioradialis muscle is located between the flexor carpi ulnaris and the extensor carpi ulnaris muscles. Option (d) is accurate and reflects the anatomical position of this muscle. The brachioradialis is a muscle of the forearm that flexes the forearm, especially when the forearm is in a midposition between pronation and supination. It is not responsible for actions on the flexor retinaculum nor is it located anterior to the extensor digitorum muscle or posterior to the palmaris longus muscle. Furthermore, the flexor carpi radialis is indeed medial to the brachioradialis, but the extensor carpi radialis longus is not posterior but rather lateral to it.

Answer 2

e. The flexor carpi radialis muscle is medial to the brachioradialis, and extensor carpi radialis longus in posterior to the brachioradialis

Step-by-step explanation:

The Brachialis is an anterior skeletal arm muscle that extends from the medial arm to the superior area of the forearm. The brachialis fibers originate in the anterior part of the humerus and direct to the inferior part of the elbow, where they insert in the upper region of the ulna and distal radius. Posterolateral to the brachialis is the extensor carpi radialis longus, while medially is the flexor carpi radialis longus. This muscle a flexor of the elbow, used in every movement needed to approximate the anterior part of the forearm to the arm. It is a very thick and powerful muscle that acts with high speed.