Musculus flexor pollicis longus

The video tutorial explores the deep flexors of the forearm, focusing on the flexor pollicis longus muscle. It discusses the muscle's origin, pathways, and its role in hand and finger joint flexion. The tutorial also covers the muscle's connection to the median nerve and its specific functions, including thumb movement and wrist bending.

Which muscles are located beneath the flexor digitorum superficialis in the forearm?

• Brachioradialis and supinator

• Extensor digitorum and extensor carpi ulnaris

• Flexor pollicis longus, flexor digitorum profundus, and pronator quadratus

• Flexor carpi ulnaris and flexor carpi radialis

Where does the flexor pollicis longus muscle originate?

• Medial epicondyle of the humerus

• Lateral epicondyle of the humerus

• Anterior facies of the radius and interosseous membrane

• Posterior surface of the ulna

Through which structure does the tendon of the flexor pollicis longus pass?

• Cubital tunnel

• Radial tunnel

• Guyon's canal

• Carpal tunnel

What is one of the primary functions of the flexor pollicis longus muscle?

• Flexion of the thumb joints

• Extension of the thumb

• Pronation of the forearm

• Abduction of the thumb

In addition to thumb flexion, what other movement does the flexor pollicis longus assist with?

• Ulnar deviation

• Extension of the wrist

• Opposition movement at the saddle joint

• Supination of the forearm