Musculus adductor pollicis

The video tutorial discusses the adductor pollicis muscle, focusing on its structure, innervation, and function. The muscle is part of the thenar muscles and is located on the radial side of the hand. It has two heads and attaches to the base of the thumb. The deep branch of the ulnar nerve innervates it. The muscle primarily performs thumb adduction and assists in thumb opposition and flexion.

Which muscle is part of the thenar muscles and is the deepest among them?

• Opponens pollicis

• Abductor pollicis brevis

• Flexor pollicis brevis

• Adductor pollicis

Where does the transverse head of the adductor pollicis muscle originate?

• On the dorsal side of the second metacarpal bone

• On the base of the first metacarpal bone

• On the palmar side of the third metacarpal bone

• On the radial side of the fourth metacarpal bone

Which nerve is responsible for the innervation of the adductor pollicis muscle?

• Musculocutaneous nerve

• Ulnar nerve

• Radial nerve

• Median nerve

What is the primary function of the adductor pollicis muscle?

• Flexion of the thumb

• Extension of the thumb

• Adduction of the thumb

• Abduction of the thumb

In addition to adduction, what other movement does the adductor pollicis assist with?

• Opposition of the thumb

• Supination of the forearm

• Pronation of the forearm

• Extension of the wrist