Forearm extensor muscles

The video tutorial covers the twelve forearm extensor muscles, organized into carpi, pollicis, and digit groups. It explains their primary actions, innervations, and anatomical features, including the anatomical snuffbox. The tutorial also highlights the unique roles of brachioradialis, supinator, and anconeus muscles.

Which of the following muscles is responsible for extending the wrist?

• Pronator teres

• Flexor carpi ulnaris

• Brachioradialis

• Extensor carpi radialis longus

What is the primary action of the abductor pollicis longus muscle?

• Extends the thumb

• Adducts the thumb

• Flexes the thumb

• Abducts the thumb

Which muscle primarily extends the metacarpophalangeal joints of the fingers?

• Lumbricals

• Extensor digitorum communis

• Flexor digitorum profundus

• Palmaris longus

What additional muscle assists in extending the pinky finger?

• Extensor pollicis brevis

• Flexor digiti minimi

• Extensor indicis

• Extensor digiti minimi

Which muscle is considered a forearm extensor but actually flexes the elbow?

• Supinator

• Brachioradialis

• Anconeus

• Extensor carpi ulnaris

What forms the floor of the anatomical snuffbox?

• Trapezium bone

• Capitate bone

• Scaphoid bone

• Lunate bone

Which nerve innervates all the forearm extensor muscles?

• Ulnar nerve

• Median nerve

• Musculocutaneous nerve

• Radial nerve