Musculus abductor pollicis longus

The video tutorial explains the anatomy and function of the deep forearm extensors, focusing on the abductor pollicis longus muscle. It describes the muscle's location, origin, and insertion, as well as its connection to the radial nerve. The tutorial also covers the muscle's role in thumb abduction and its support in radial abduction at the wrist.

Which group of muscles does the abductor pollicis longus belong to?

• Deep leg extensors

• Intrinsic hand muscles

• Superficial forearm flexors

• Deep forearm extensors

Where is the origin of the abductor pollicis longus muscle primarily located?

• On the lateral surface of the femur

• On the anterior surface of the humerus

• On the dorsal surface of the radius and ulna

• On the palmar surface of the hand

What is the name of the membrane that the tendon of the abductor pollicis longus radiates into?

• Membrana Interossea Antebrachii

• Membrana Interossea Cruris

• Membrana Interossea Thoracis

• Membrana Interossea Pelvis

Which nerve supplies the abductor pollicis longus muscle?

• Median nerve

• Sciatic nerve

• Radial nerve

• Ulnar nerve

What movement does the abductor pollicis longus muscle primarily perform?

• Adduction of the wrist

• Abduction of the thumb

• Extension of the fingers

• Flexion of the thumb